diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5956fa7bb33..f050052b293 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -106,7 +106,7 @@ jobs:
   compatibility-test:
     strategy:
       matrix:
-        go-version: ["~1.22.0", "~1.21.3", "~1.20.10"]
+        go-version: ["~1.22.0", "~1.21.3"]
         os: [ubuntu-latest, macos-latest, windows-latest]
         # GitHub Actions does not support arm* architectures on default
         # runners. It is possible to accomplish this with a self-hosted runner
diff --git a/.github/workflows/scripts/dependabot-pr.sh b/.github/workflows/scripts/dependabot-pr.sh
index c39b794dc26..7146f0a4748 100755
--- a/.github/workflows/scripts/dependabot-pr.sh
+++ b/.github/workflows/scripts/dependabot-pr.sh
@@ -1,18 +1,7 @@
 #!/bin/zsh -ex
 
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 git config user.name opentelemetrybot
 git config user.email 107717825+opentelemetrybot@users.noreply.github.com
@@ -29,15 +18,15 @@ declare -A mods
 
 for line in $requests; do
     echo $line
-    if [[ $line != Bump* ]]; then
+    if [[ $line != build* ]]; then
         continue
     fi
 
-    module=$(echo $line | cut -f 2 -d " ")
+    module=$(echo $line | cut -f 3 -d " ")
     if [[ $module == go.opentelemetry.io/otel* ]]; then
         continue
     fi
-    version=$(echo $line | cut -f 6 -d " ")
+    version=$(echo $line | cut -f 7 -d " ")
 
     mods[$module]=$version
     message+=$line
@@ -53,8 +42,7 @@ for module version in ${(kv)mods}; do
     done
 done
 
-make go-mod-tidy
-make build
+make go-mod-tidy golangci-lint-fix build
 
 git add go.sum go.mod
 git add "**/go.sum" "**/go.mod"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index db6f8b29942..9cd73f690d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
+### Removed
+
+- Drop support for [Go 1.20]. (#4967)
+
 ## [1.24.0/0.46.0/0.0.1-alpha] 2024-02-23
 
 This release is the last to support [Go 1.20].
diff --git a/Makefile b/Makefile
index 6de95219be7..6b6a01c1441 100644
--- a/Makefile
+++ b/Makefile
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 TOOLS_MOD_DIR := ./internal/tools
 
@@ -225,7 +214,7 @@ go-mod-tidy/%: DIR=$*
 go-mod-tidy/%: | crosslink
 	@echo "$(GO) mod tidy in $(DIR)" \
 		&& cd $(DIR) \
-		&& $(GO) mod tidy -compat=1.20
+		&& $(GO) mod tidy -compat=1.21
 
 .PHONY: lint-modules
 lint-modules: go-mod-tidy
diff --git a/README.md b/README.md
index 7766259a5c1..aa9baa6c627 100644
--- a/README.md
+++ b/README.md
@@ -51,19 +51,14 @@ Currently, this project supports the following environments.
 |---------|------------|--------------|
 | Ubuntu  | 1.22       | amd64        |
 | Ubuntu  | 1.21       | amd64        |
-| Ubuntu  | 1.20       | amd64        |
 | Ubuntu  | 1.22       | 386          |
 | Ubuntu  | 1.21       | 386          |
-| Ubuntu  | 1.20       | 386          |
 | MacOS   | 1.22       | amd64        |
 | MacOS   | 1.21       | amd64        |
-| MacOS   | 1.20       | amd64        |
 | Windows | 1.22       | amd64        |
 | Windows | 1.21       | amd64        |
-| Windows | 1.20       | amd64        |
 | Windows | 1.22       | 386          |
 | Windows | 1.21       | 386          |
-| Windows | 1.20       | 386          |
 
 While this project should work for other systems, no compatibility guarantees
 are made for those systems currently.
diff --git a/attribute/benchmark_test.go b/attribute/benchmark_test.go
index 1030a1a9deb..d81bbe8292a 100644
--- a/attribute/benchmark_test.go
+++ b/attribute/benchmark_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute_test
 
diff --git a/attribute/doc.go b/attribute/doc.go
index dafe7424dfb..eef51ebc2a2 100644
--- a/attribute/doc.go
+++ b/attribute/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package attribute provides key and value attributes.
 package attribute // import "go.opentelemetry.io/otel/attribute"
diff --git a/attribute/encoder.go b/attribute/encoder.go
index fe2bc5766cf..318e42fcabe 100644
--- a/attribute/encoder.go
+++ b/attribute/encoder.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute // import "go.opentelemetry.io/otel/attribute"
 
diff --git a/attribute/filter.go b/attribute/filter.go
index 638c213d59a..be9cd922d87 100644
--- a/attribute/filter.go
+++ b/attribute/filter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute // import "go.opentelemetry.io/otel/attribute"
 
diff --git a/attribute/filter_test.go b/attribute/filter_test.go
index c668e260b83..18fd89d4ebf 100644
--- a/attribute/filter_test.go
+++ b/attribute/filter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute
 
diff --git a/attribute/iterator.go b/attribute/iterator.go
index 841b271fb7d..f2ba89ce4bc 100644
--- a/attribute/iterator.go
+++ b/attribute/iterator.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute // import "go.opentelemetry.io/otel/attribute"
 
diff --git a/attribute/iterator_test.go b/attribute/iterator_test.go
index a40432aaacc..89b0971fae2 100644
--- a/attribute/iterator_test.go
+++ b/attribute/iterator_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute_test
 
diff --git a/attribute/key.go b/attribute/key.go
index 0656a04e43b..d9a22c65020 100644
--- a/attribute/key.go
+++ b/attribute/key.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute // import "go.opentelemetry.io/otel/attribute"
 
diff --git a/attribute/key_test.go b/attribute/key_test.go
index 1c739714e0f..45de9d81817 100644
--- a/attribute/key_test.go
+++ b/attribute/key_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute_test
 
diff --git a/attribute/kv.go b/attribute/kv.go
index 1ddf3ce0580..3028f9a40f8 100644
--- a/attribute/kv.go
+++ b/attribute/kv.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute // import "go.opentelemetry.io/otel/attribute"
 
diff --git a/attribute/kv_test.go b/attribute/kv_test.go
index 17815224ad1..3a2e948141d 100644
--- a/attribute/kv_test.go
+++ b/attribute/kv_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute_test
 
diff --git a/attribute/set.go b/attribute/set.go
index fb6da51450c..108a4afd1d8 100644
--- a/attribute/set.go
+++ b/attribute/set.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute // import "go.opentelemetry.io/otel/attribute"
 
diff --git a/attribute/set_test.go b/attribute/set_test.go
index 4382e9a7c54..4920f4cbf15 100644
--- a/attribute/set_test.go
+++ b/attribute/set_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute_test
 
diff --git a/attribute/value.go b/attribute/value.go
index cb21dd5c096..b320314133a 100644
--- a/attribute/value.go
+++ b/attribute/value.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute // import "go.opentelemetry.io/otel/attribute"
 
diff --git a/attribute/value_test.go b/attribute/value_test.go
index ec79dc62a27..afb98cfae8b 100644
--- a/attribute/value_test.go
+++ b/attribute/value_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute_test
 
diff --git a/baggage/baggage.go b/baggage/baggage.go
index 7d27cf77d5c..f3e870f8a8e 100644
--- a/baggage/baggage.go
+++ b/baggage/baggage.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package baggage // import "go.opentelemetry.io/otel/baggage"
 
diff --git a/baggage/baggage_test.go b/baggage/baggage_test.go
index 4bacf1ea54b..4ef5b334297 100644
--- a/baggage/baggage_test.go
+++ b/baggage/baggage_test.go
@@ -1,23 +1,12 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package baggage
 
 import (
 	"fmt"
 	"math/rand"
-	"sort"
+	"slices"
 	"strings"
 	"testing"
 
@@ -622,11 +611,11 @@ func TestBaggageString(t *testing.T) {
 		for i, m := range members {
 			parts := strings.Split(m, propertyDelimiter)
 			if len(parts) > 1 {
-				sort.Strings(parts[1:])
+				slices.Sort(parts[1:])
 				members[i] = strings.Join(parts, propertyDelimiter)
 			}
 		}
-		sort.Strings(members)
+		slices.Sort(members)
 		return strings.Join(members, listDelimiter)
 	}
 
diff --git a/baggage/context.go b/baggage/context.go
index 24b34b7564a..a572461a05f 100644
--- a/baggage/context.go
+++ b/baggage/context.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package baggage // import "go.opentelemetry.io/otel/baggage"
 
diff --git a/baggage/context_test.go b/baggage/context_test.go
index 1b32acdb54d..3ce82b11532 100644
--- a/baggage/context_test.go
+++ b/baggage/context_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package baggage
 
diff --git a/baggage/doc.go b/baggage/doc.go
index 4545100df67..b51d87cab70 100644
--- a/baggage/doc.go
+++ b/baggage/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package baggage provides functionality for storing and retrieving
diff --git a/bridge/opencensus/config.go b/bridge/opencensus/config.go
index 26c94742fb1..ddd8e58a5f8 100644
--- a/bridge/opencensus/config.go
+++ b/bridge/opencensus/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
 
diff --git a/bridge/opencensus/config_test.go b/bridge/opencensus/config_test.go
index 5a2011f0c98..7d5361c1ea9 100644
--- a/bridge/opencensus/config_test.go
+++ b/bridge/opencensus/config_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
 
diff --git a/bridge/opencensus/doc.go b/bridge/opencensus/doc.go
index 70990920474..8d363ce4dbc 100644
--- a/bridge/opencensus/doc.go
+++ b/bridge/opencensus/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package opencensus provides a migration bridge from OpenCensus to
 // OpenTelemetry for metrics and traces. The bridge incorporates metrics and
diff --git a/bridge/opencensus/example_test.go b/bridge/opencensus/example_test.go
index 3fa3b62179c..4ae0c9ee721 100644
--- a/bridge/opencensus/example_test.go
+++ b/bridge/opencensus/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opencensus_test
 
diff --git a/bridge/opencensus/go.mod b/bridge/opencensus/go.mod
index 482a714cd3f..c8af4880735 100644
--- a/bridge/opencensus/go.mod
+++ b/bridge/opencensus/go.mod
@@ -1,9 +1,9 @@
 module go.opentelemetry.io/otel/bridge/opencensus
 
-go 1.20
+go 1.21
 
 require (
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opencensus.io v0.24.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
diff --git a/bridge/opencensus/go.sum b/bridge/opencensus/go.sum
index 8d982bbb7a4..dec7ae2920f 100644
--- a/bridge/opencensus/go.sum
+++ b/bridge/opencensus/go.sum
@@ -35,6 +35,7 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.3/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
@@ -50,8 +51,8 @@ github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpE
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
 go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
diff --git a/bridge/opencensus/internal/handler.go b/bridge/opencensus/internal/handler.go
index 6bf5496169d..53906258075 100644
--- a/bridge/opencensus/internal/handler.go
+++ b/bridge/opencensus/internal/handler.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/bridge/opencensus/internal"
 
diff --git a/bridge/opencensus/internal/oc2otel/attributes.go b/bridge/opencensus/internal/oc2otel/attributes.go
index 3e1cebdb800..1b9e931e073 100644
--- a/bridge/opencensus/internal/oc2otel/attributes.go
+++ b/bridge/opencensus/internal/oc2otel/attributes.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oc2otel // import "go.opentelemetry.io/otel/bridge/opencensus/internal/oc2otel"
 
diff --git a/bridge/opencensus/internal/oc2otel/attributes_test.go b/bridge/opencensus/internal/oc2otel/attributes_test.go
index 44d40ec899a..8c1447341fd 100644
--- a/bridge/opencensus/internal/oc2otel/attributes_test.go
+++ b/bridge/opencensus/internal/oc2otel/attributes_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oc2otel
 
diff --git a/bridge/opencensus/internal/oc2otel/span_context.go b/bridge/opencensus/internal/oc2otel/span_context.go
index 006226f30ab..18c80c9b1ba 100644
--- a/bridge/opencensus/internal/oc2otel/span_context.go
+++ b/bridge/opencensus/internal/oc2otel/span_context.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oc2otel // import "go.opentelemetry.io/otel/bridge/opencensus/internal/oc2otel"
 
diff --git a/bridge/opencensus/internal/oc2otel/span_context_test.go b/bridge/opencensus/internal/oc2otel/span_context_test.go
index b45d5fd3931..1a2bc62aa98 100644
--- a/bridge/opencensus/internal/oc2otel/span_context_test.go
+++ b/bridge/opencensus/internal/oc2otel/span_context_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oc2otel
 
diff --git a/bridge/opencensus/internal/oc2otel/tracer_start_options.go b/bridge/opencensus/internal/oc2otel/tracer_start_options.go
index 030df047f35..e09a90605c3 100644
--- a/bridge/opencensus/internal/oc2otel/tracer_start_options.go
+++ b/bridge/opencensus/internal/oc2otel/tracer_start_options.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oc2otel // import "go.opentelemetry.io/otel/bridge/opencensus/internal/oc2otel"
 
diff --git a/bridge/opencensus/internal/oc2otel/tracer_start_options_test.go b/bridge/opencensus/internal/oc2otel/tracer_start_options_test.go
index 6a525424cab..fbfda6cca9e 100644
--- a/bridge/opencensus/internal/oc2otel/tracer_start_options_test.go
+++ b/bridge/opencensus/internal/oc2otel/tracer_start_options_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oc2otel
 
diff --git a/bridge/opencensus/internal/ocmetric/metric.go b/bridge/opencensus/internal/ocmetric/metric.go
index 8fdd0eb6167..4d053e8016d 100644
--- a/bridge/opencensus/internal/ocmetric/metric.go
+++ b/bridge/opencensus/internal/ocmetric/metric.go
@@ -1,25 +1,15 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/bridge/opencensus/internal/ocmetric"
 
 import (
+	"cmp"
 	"errors"
 	"fmt"
 	"math"
 	"reflect"
-	"sort"
+	"slices"
 	"strconv"
 
 	ocmetricdata "go.opencensus.io/metric/metricdata"
@@ -211,8 +201,9 @@ func convertExemplar(ocExemplar *ocmetricdata.Exemplar) (metricdata.Exemplar[flo
 			exemplar.FilteredAttributes = append(exemplar.FilteredAttributes, convertKV(k, v))
 		}
 	}
-	sortable := attribute.Sortable(exemplar.FilteredAttributes)
-	sort.Sort(&sortable)
+	slices.SortFunc(exemplar.FilteredAttributes, func(a, b attribute.KeyValue) int {
+		return cmp.Compare(a.Key, b.Key)
+	})
 	return exemplar, err
 }
 
@@ -388,18 +379,12 @@ func convertQuantiles(snapshot ocmetricdata.Snapshot) []metricdata.QuantileValue
 			Value:    value,
 		})
 	}
-	sort.Sort(byQuantile(quantileValues))
+	slices.SortFunc(quantileValues, func(a, b metricdata.QuantileValue) int {
+		return cmp.Compare(a.Quantile, b.Quantile)
+	})
 	return quantileValues
 }
 
-// byQuantile implements sort.Interface for []metricdata.QuantileValue
-// based on the Quantile field.
-type byQuantile []metricdata.QuantileValue
-
-func (a byQuantile) Len() int           { return len(a) }
-func (a byQuantile) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
-func (a byQuantile) Less(i, j int) bool { return a[i].Quantile < a[j].Quantile }
-
 // convertAttrs converts from OpenCensus attribute keys and values to an
 // OpenTelemetry attribute Set.
 func convertAttrs(keys []ocmetricdata.LabelKey, values []ocmetricdata.LabelValue) (attribute.Set, error) {
diff --git a/bridge/opencensus/internal/ocmetric/metric_test.go b/bridge/opencensus/internal/ocmetric/metric_test.go
index b7a25e5c776..afdcfaa9e76 100644
--- a/bridge/opencensus/internal/ocmetric/metric_test.go
+++ b/bridge/opencensus/internal/ocmetric/metric_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/bridge/opencensus/opencensusmetric/internal"
 
@@ -18,7 +7,9 @@ import (
 	"errors"
 	"fmt"
 	"math"
+	"math/rand"
 	"reflect"
+	"strconv"
 	"testing"
 	"time"
 
@@ -1179,3 +1170,57 @@ func TestConvertKV(t *testing.T) {
 		})
 	}
 }
+
+func BenchmarkConvertExemplar(b *testing.B) {
+	const attchmentsN = 10
+	data := make([]*ocmetricdata.Exemplar, b.N)
+	for i := range data {
+		a := make(ocmetricdata.Attachments, attchmentsN)
+		for j := 0; j < attchmentsN; j++ {
+			a[strconv.Itoa(j)] = rand.Int63()
+		}
+		data[i] = &ocmetricdata.Exemplar{
+			Value:       rand.NormFloat64(),
+			Timestamp:   time.Now(),
+			Attachments: a,
+		}
+	}
+
+	var out metricdata.Exemplar[float64]
+
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		out, _ = convertExemplar(data[n])
+	}
+
+	_ = out
+}
+
+func BenchmarkConvertQuantiles(b *testing.B) {
+	const percentileN = 20
+	data := make([]ocmetricdata.Snapshot, b.N)
+	for i := range data {
+		p := make(map[float64]float64, percentileN)
+		for j := 0; j < percentileN; j++ {
+			v := rand.Float64()
+			for v == 0 {
+				// Convert from [0, 1) interval to (0, 1).
+				v = rand.Float64()
+			}
+			v *= 100 // Convert from (0, 1) interval to (0, 100).
+			p[v] = rand.ExpFloat64()
+		}
+		data[i] = ocmetricdata.Snapshot{Percentiles: p}
+	}
+
+	var out []metricdata.QuantileValue
+
+	b.ReportAllocs()
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		out = convertQuantiles(data[n])
+	}
+
+	_ = out
+}
diff --git a/bridge/opencensus/internal/otel2oc/span_context.go b/bridge/opencensus/internal/otel2oc/span_context.go
index 6355eb555fb..74dcc90b8dc 100644
--- a/bridge/opencensus/internal/otel2oc/span_context.go
+++ b/bridge/opencensus/internal/otel2oc/span_context.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel2oc // import "go.opentelemetry.io/otel/bridge/opencensus/internal/otel2oc"
 
diff --git a/bridge/opencensus/internal/otel2oc/span_context_test.go b/bridge/opencensus/internal/otel2oc/span_context_test.go
index 2660009827d..36ae3cb2331 100644
--- a/bridge/opencensus/internal/otel2oc/span_context_test.go
+++ b/bridge/opencensus/internal/otel2oc/span_context_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel2oc
 
diff --git a/bridge/opencensus/internal/span.go b/bridge/opencensus/internal/span.go
index 0cf38117194..e3b76064bfc 100644
--- a/bridge/opencensus/internal/span.go
+++ b/bridge/opencensus/internal/span.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/bridge/opencensus/internal"
 
diff --git a/bridge/opencensus/internal/span_test.go b/bridge/opencensus/internal/span_test.go
index 7aa023e71c2..e11632e0252 100644
--- a/bridge/opencensus/internal/span_test.go
+++ b/bridge/opencensus/internal/span_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal_test
 
diff --git a/bridge/opencensus/internal/tracer.go b/bridge/opencensus/internal/tracer.go
index 4ed70a30afe..2454f27091c 100644
--- a/bridge/opencensus/internal/tracer.go
+++ b/bridge/opencensus/internal/tracer.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/bridge/opencensus/internal"
 
diff --git a/bridge/opencensus/internal/tracer_test.go b/bridge/opencensus/internal/tracer_test.go
index 618a7b81567..a32115fa501 100644
--- a/bridge/opencensus/internal/tracer_test.go
+++ b/bridge/opencensus/internal/tracer_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal_test
 
diff --git a/bridge/opencensus/metric.go b/bridge/opencensus/metric.go
index 888e82f5ff3..f4c8408db5b 100644
--- a/bridge/opencensus/metric.go
+++ b/bridge/opencensus/metric.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
 
diff --git a/bridge/opencensus/metric_test.go b/bridge/opencensus/metric_test.go
index 901953c3a81..e1676b7182f 100644
--- a/bridge/opencensus/metric_test.go
+++ b/bridge/opencensus/metric_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
 
diff --git a/bridge/opencensus/test/bridge_test.go b/bridge/opencensus/test/bridge_test.go
index 98041025c60..1fe74fe4f7d 100644
--- a/bridge/opencensus/test/bridge_test.go
+++ b/bridge/opencensus/test/bridge_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package test
 
diff --git a/bridge/opencensus/test/go.mod b/bridge/opencensus/test/go.mod
index dd144140262..cbbbcc2b4fe 100644
--- a/bridge/opencensus/test/go.mod
+++ b/bridge/opencensus/test/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/bridge/opencensus/test
 
-go 1.20
+go 1.21
 
 require (
 	go.opencensus.io v0.24.0
diff --git a/bridge/opencensus/test/go.sum b/bridge/opencensus/test/go.sum
index 34ecbfcd138..feb0121ae90 100644
--- a/bridge/opencensus/test/go.sum
+++ b/bridge/opencensus/test/go.sum
@@ -35,6 +35,7 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.3/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@@ -45,7 +46,8 @@ github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpE
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
 go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
diff --git a/bridge/opencensus/trace.go b/bridge/opencensus/trace.go
index 92ec6d6961a..0ff72b9e9c7 100644
--- a/bridge/opencensus/trace.go
+++ b/bridge/opencensus/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
 
diff --git a/bridge/opencensus/trace_test.go b/bridge/opencensus/trace_test.go
index 529a77070c7..d00fff5414f 100644
--- a/bridge/opencensus/trace_test.go
+++ b/bridge/opencensus/trace_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
 
diff --git a/bridge/opencensus/version.go b/bridge/opencensus/version.go
index 8b54f1c29b9..530cffd1410 100644
--- a/bridge/opencensus/version.go
+++ b/bridge/opencensus/version.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
 
diff --git a/bridge/opentracing/bridge.go b/bridge/opentracing/bridge.go
index 6ecb3fc25bf..8aee5567f9e 100644
--- a/bridge/opentracing/bridge.go
+++ b/bridge/opentracing/bridge.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opentracing // import "go.opentelemetry.io/otel/bridge/opentracing"
 
diff --git a/bridge/opentracing/bridge_test.go b/bridge/opentracing/bridge_test.go
index 11c21d79496..0eea0ab0f53 100644
--- a/bridge/opentracing/bridge_test.go
+++ b/bridge/opentracing/bridge_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opentracing
 
diff --git a/bridge/opentracing/doc.go b/bridge/opentracing/doc.go
index 5b97ee334ab..5a89b6549a7 100644
--- a/bridge/opentracing/doc.go
+++ b/bridge/opentracing/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package opentracing implements a bridge that forwards OpenTracing API
 // calls to the OpenTelemetry SDK.
diff --git a/bridge/opentracing/go.mod b/bridge/opentracing/go.mod
index 1e8a5ab8686..66408dec9ec 100644
--- a/bridge/opentracing/go.mod
+++ b/bridge/opentracing/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/bridge/opentracing
 
-go 1.20
+go 1.21
 
 replace go.opentelemetry.io/otel => ../..
 
@@ -8,7 +8,7 @@ replace go.opentelemetry.io/otel/trace => ../../trace
 
 require (
 	github.com/opentracing/opentracing-go v1.2.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
 )
diff --git a/bridge/opentracing/go.sum b/bridge/opentracing/go.sum
index 5d0939ce33a..92351b5bcc8 100644
--- a/bridge/opentracing/go.sum
+++ b/bridge/opentracing/go.sum
@@ -7,14 +7,15 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/opentracing/opentracing-go v1.2.0 h1:uEJPy/1a5RIPAJ0Ov+OIO8OxWu77jEv+1B0VhjKrZUs=
 github.com/opentracing/opentracing-go v1.2.0/go.mod h1:GxEUsuufX4nBwe+T+Wl9TAgYrxe9dPLANfrWvHYVTgc=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/bridge/opentracing/internal/doc.go b/bridge/opentracing/internal/doc.go
index 96f94d7242e..785121ce628 100644
--- a/bridge/opentracing/internal/doc.go
+++ b/bridge/opentracing/internal/doc.go
@@ -1,15 +1,4 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/bridge/opentracing/internal"
diff --git a/bridge/opentracing/internal/mock.go b/bridge/opentracing/internal/mock.go
index 7d7f00730ef..ba92206f419 100644
--- a/bridge/opentracing/internal/mock.go
+++ b/bridge/opentracing/internal/mock.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/bridge/opentracing/internal"
 
diff --git a/bridge/opentracing/migration/api.go b/bridge/opentracing/migration/api.go
index 9a6b70d9da0..3a97a86e041 100644
--- a/bridge/opentracing/migration/api.go
+++ b/bridge/opentracing/migration/api.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package migration provides interfaces and functions that are useful for
 // providing a cooperation of the OpenTelemetry tracers with the
diff --git a/bridge/opentracing/migration/defer.go b/bridge/opentracing/migration/defer.go
index cbeca54cccc..8d87385fe8a 100644
--- a/bridge/opentracing/migration/defer.go
+++ b/bridge/opentracing/migration/defer.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package migration // import "go.opentelemetry.io/otel/bridge/opentracing/migration"
 
diff --git a/bridge/opentracing/mix_test.go b/bridge/opentracing/mix_test.go
index 7dc902545a6..bd2a3e291fb 100644
--- a/bridge/opentracing/mix_test.go
+++ b/bridge/opentracing/mix_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opentracing
 
diff --git a/bridge/opentracing/provider.go b/bridge/opentracing/provider.go
index 90bad0bd516..b069753f7e9 100644
--- a/bridge/opentracing/provider.go
+++ b/bridge/opentracing/provider.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//	http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opentracing // import "go.opentelemetry.io/otel/bridge/opentracing"
 
diff --git a/bridge/opentracing/provider_test.go b/bridge/opentracing/provider_test.go
index 1a4dd5ca5b5..0560e0230b5 100644
--- a/bridge/opentracing/provider_test.go
+++ b/bridge/opentracing/provider_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opentracing
 
diff --git a/bridge/opentracing/test/bridge_grpc_test.go b/bridge/opentracing/test/bridge_grpc_test.go
index 6b2208f6d3c..68f22ba6960 100644
--- a/bridge/opentracing/test/bridge_grpc_test.go
+++ b/bridge/opentracing/test/bridge_grpc_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package test
 
diff --git a/bridge/opentracing/test/go.mod b/bridge/opentracing/test/go.mod
index fd8727aa98a..073a2b63afa 100644
--- a/bridge/opentracing/test/go.mod
+++ b/bridge/opentracing/test/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/bridge/opentracing/test
 
-go 1.20
+go 1.21
 
 replace go.opentelemetry.io/otel => ../../..
 
@@ -11,10 +11,10 @@ replace go.opentelemetry.io/otel/trace => ../../../trace
 require (
 	github.com/opentracing-contrib/go-grpc v0.0.0-20210225150812-73cb765af46e
 	github.com/opentracing/opentracing-go v1.2.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/bridge/opentracing v1.24.0
-	google.golang.org/grpc v1.61.1
+	google.golang.org/grpc v1.62.0
 )
 
 require (
@@ -25,10 +25,10 @@ require (
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
-	golang.org/x/net v0.18.0 // indirect
+	golang.org/x/net v0.20.0 // indirect
 	golang.org/x/sys v0.16.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 // indirect
 	google.golang.org/protobuf v1.32.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/bridge/opentracing/test/go.sum b/bridge/opentracing/test/go.sum
index c9afb3566f6..7c4c40e063a 100644
--- a/bridge/opentracing/test/go.sum
+++ b/bridge/opentracing/test/go.sum
@@ -19,6 +19,7 @@ github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiu
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/grpc-ecosystem/grpc-opentracing v0.0.0-20180507213350-8e809c8a8645/go.mod h1:6iZfnjpejD4L/4DwD7NryNaJyCQdzwWwH2MWhCA90Kw=
 github.com/opentracing-contrib/go-grpc v0.0.0-20210225150812-73cb765af46e h1:4cPxUYdgaGzZIT5/j0IfqOrrXmq6bG8AwvwisMXpdrg=
 github.com/opentracing-contrib/go-grpc v0.0.0-20210225150812-73cb765af46e/go.mod h1:DYR5Eij8rJl8h7gblRrOZ8g0kW1umSpKqYIBTgeDtLo=
@@ -30,14 +31,14 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190921015927-1a5e07d1ff72/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.18.0 h1:mIYleuAkSbHh0tCv7RvjL3F6ZVbLjq4+R7zbOn3Kokg=
-golang.org/x/net v0.18.0/go.mod h1:/czyP5RqHAH4odGYxBJ1qz0+CE5WZ+2j1YgoEo8F2jQ=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -51,11 +52,11 @@ golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBn
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17 h1:Jyp0Hsi0bmHXG6k9eATXoYtjd6e2UzZ1SCn/wIupY14=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17/go.mod h1:oQ5rr10WTTMvP4A36n8JpR1OrO1BEiV4f78CneXZxkA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 h1:AjyfHzEPEFp/NpvfN5g+KDla3EMojjhRVZc1i7cj+oM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80/go.mod h1:PAREbraiVEVGVdTZsVWjSbbTtSyGbAgIIvni8a8CD5s=
 google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.61.1 h1:kLAiWrZs7YeDM6MumDe7m3y4aM6wacLzM1Y/wiLP9XY=
-google.golang.org/grpc v1.61.1/go.mod h1:VUbo7IFqmF1QtCAstipjG0GIoq49KvMe9+h1jFLBNJs=
+google.golang.org/grpc v1.62.0 h1:HQKZ/fa1bXkX1oFOvSjmZEUL8wLSaZTjCcLAlmZRtdk=
+google.golang.org/grpc v1.62.0/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
diff --git a/bridge/opentracing/util.go b/bridge/opentracing/util.go
index 725777c7adb..585e2dee4d4 100644
--- a/bridge/opentracing/util.go
+++ b/bridge/opentracing/util.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opentracing // import "go.opentelemetry.io/otel/bridge/opentracing"
 
diff --git a/bridge/opentracing/wrapper.go b/bridge/opentracing/wrapper.go
index 1e065e3bc62..13b91c24048 100644
--- a/bridge/opentracing/wrapper.go
+++ b/bridge/opentracing/wrapper.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package opentracing // import "go.opentelemetry.io/otel/bridge/opentracing"
 
diff --git a/codes/codes.go b/codes/codes.go
index 587ebae4e30..df29d96a6da 100644
--- a/codes/codes.go
+++ b/codes/codes.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package codes // import "go.opentelemetry.io/otel/codes"
 
diff --git a/codes/codes_test.go b/codes/codes_test.go
index 3518af1d21b..7c2322bddf6 100644
--- a/codes/codes_test.go
+++ b/codes/codes_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package codes
 
diff --git a/codes/doc.go b/codes/doc.go
index 4e328fbb4b3..ee8db448b8b 100644
--- a/codes/doc.go
+++ b/codes/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package codes defines the canonical error codes used by OpenTelemetry.
diff --git a/doc.go b/doc.go
index 36d7c24e88e..441c595014d 100644
--- a/doc.go
+++ b/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package otel provides global access to the OpenTelemetry API. The subpackages of
diff --git a/error_handler.go b/error_handler.go
index 72fad85412b..67414c71e05 100644
--- a/error_handler.go
+++ b/error_handler.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel // import "go.opentelemetry.io/otel"
 
diff --git a/example/dice/doc.go b/example/dice/doc.go
index 31a3f7bfc20..237a50ea65f 100644
--- a/example/dice/doc.go
+++ b/example/dice/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Dice is the "Roll the dice" application.
 //
diff --git a/example/dice/go.mod b/example/dice/go.mod
index e90df37b119..d41967a8188 100644
--- a/example/dice/go.mod
+++ b/example/dice/go.mod
@@ -1,9 +1,9 @@
 module go.opentelemetry.io/otel/example/dice
 
-go 1.20
+go 1.21
 
 require (
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.48.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.49.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.24.0
 	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.24.0
diff --git a/example/dice/go.sum b/example/dice/go.sum
index 770d5b3c6ee..58f8f850e4b 100644
--- a/example/dice/go.sum
+++ b/example/dice/go.sum
@@ -1,4 +1,5 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
 github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
@@ -7,10 +8,14 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.48.0 h1:doUP+ExOpH3spVTLS0FcWGLnQrPct/hD/bCPbDRUEAU=
-go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.48.0/go.mod h1:rdENBZMT2OE6Ne/KLwpiXudnAsbdrdBaqBvTN8M8BgA=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.49.0 h1:jq9TW8u3so/bN+JPT166wjOI6/vQPF6Xe7nMNIltagk=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.49.0/go.mod h1:p8pYQP+m5XfbZm9fxtSKAbM6oIllS7s2AfxrChvc7iw=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/example/dice/main.go b/example/dice/main.go
index 7ba965300d1..f0327b360ea 100644
--- a/example/dice/main.go
+++ b/example/dice/main.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package main
 
diff --git a/example/dice/otel.go b/example/dice/otel.go
index 87e64dc6ce8..15540cf873c 100644
--- a/example/dice/otel.go
+++ b/example/dice/otel.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package main
 
diff --git a/example/dice/rolldice.go b/example/dice/rolldice.go
index 10bd237c325..24ebd1c424b 100644
--- a/example/dice/rolldice.go
+++ b/example/dice/rolldice.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package main
 
diff --git a/example/namedtracer/foo/foo.go b/example/namedtracer/foo/foo.go
index 074912e26e1..af24d51fed4 100644
--- a/example/namedtracer/foo/foo.go
+++ b/example/namedtracer/foo/foo.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package foo // import "go.opentelemetry.io/otel/example/namedtracer/foo"
 
diff --git a/example/namedtracer/go.mod b/example/namedtracer/go.mod
index 0da9e59efc1..efa0a993db0 100644
--- a/example/namedtracer/go.mod
+++ b/example/namedtracer/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/example/namedtracer
 
-go 1.20
+go 1.21
 
 replace (
 	go.opentelemetry.io/otel => ../..
diff --git a/example/namedtracer/go.sum b/example/namedtracer/go.sum
index 8bc156d8db0..6a60a259fce 100644
--- a/example/namedtracer/go.sum
+++ b/example/namedtracer/go.sum
@@ -1,12 +1,17 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
 github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/example/namedtracer/main.go b/example/namedtracer/main.go
index 51caa20a3dd..47048bef006 100644
--- a/example/namedtracer/main.go
+++ b/example/namedtracer/main.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package main
 
diff --git a/example/opencensus/go.mod b/example/opencensus/go.mod
index 0248a47c535..38f2961d585 100644
--- a/example/opencensus/go.mod
+++ b/example/opencensus/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/example/opencensus
 
-go 1.20
+go 1.21
 
 replace (
 	go.opentelemetry.io/otel => ../..
diff --git a/example/opencensus/go.sum b/example/opencensus/go.sum
index 34ecbfcd138..feb0121ae90 100644
--- a/example/opencensus/go.sum
+++ b/example/opencensus/go.sum
@@ -35,6 +35,7 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.3/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@@ -45,7 +46,8 @@ github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpE
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
 go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
diff --git a/example/opencensus/main.go b/example/opencensus/main.go
index 4d1d1d04beb..b427540990f 100644
--- a/example/opencensus/main.go
+++ b/example/opencensus/main.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package main
 
diff --git a/example/otel-collector/go.mod b/example/otel-collector/go.mod
index c7c00087b0c..7c357fc2cf9 100644
--- a/example/otel-collector/go.mod
+++ b/example/otel-collector/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/example/otel-collector
 
-go 1.20
+go 1.21
 
 replace (
 	go.opentelemetry.io/otel => ../..
@@ -12,7 +12,7 @@ require (
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
-	google.golang.org/grpc v1.61.1
+	google.golang.org/grpc v1.62.0
 )
 
 require (
@@ -24,11 +24,11 @@ require (
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.24.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.1.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/net v0.20.0 // indirect
 	golang.org/x/sys v0.17.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 // indirect
 	google.golang.org/protobuf v1.32.0 // indirect
 )
 
diff --git a/example/otel-collector/go.sum b/example/otel-collector/go.sum
index 94cbc1869ca..795272f643c 100644
--- a/example/otel-collector/go.sum
+++ b/example/otel-collector/go.sum
@@ -1,6 +1,7 @@
 github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
 github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
 github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
@@ -11,29 +12,35 @@ github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 h1:Wqo399gCIufwto+VfwCSvsnfGpF/w5E9CNxSwbpD6No=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0/go.mod h1:qmOFXW2epJhM0qSnUUYpldc7gVz2KMQwJ/QYCDIa7XU=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opentelemetry.io/proto/otlp v1.1.0 h1:2Di21piLrCqJ3U3eXGCTPHE9R8Nh+0uglSnOyxikMeI=
 go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7ej/RNTae6MdY=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
-golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
-golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
+go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto v0.0.0-20231212172506-995d672761c0 h1:YJ5pD9rF8o9Qtta0Cmy9rdBwkSjrTCT6XTiUQVOtIos=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 h1:rcS6EyEaoCO52hQDupoSfrxI3R6C2Tq741is7X8OvnM=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917/go.mod h1:CmlNWB9lSezaYELKS5Ym1r44VrrbPUa7JTvw+6MbpJ0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917 h1:6G8oQ016D88m1xAKljMlBOOGWDZkes4kMhgGFlf8WcQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917/go.mod h1:xtjpI3tXFPP051KaWnhvxkiubL/6dJ18vLVf7q2pTOU=
-google.golang.org/grpc v1.61.1 h1:kLAiWrZs7YeDM6MumDe7m3y4aM6wacLzM1Y/wiLP9XY=
-google.golang.org/grpc v1.61.1/go.mod h1:VUbo7IFqmF1QtCAstipjG0GIoq49KvMe9+h1jFLBNJs=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80 h1:KAeGQVN3M9nD0/bQXnr/ClcEMJ968gUXJQ9pwfSynuQ=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80/go.mod h1:cc8bqMqtv9gMOr0zHg2Vzff5ULhhL2IXP4sbcn32Dro=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 h1:Lj5rbfG876hIAYFjqiJnPHfhXbv+nzTWfm04Fg/XSVU=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80/go.mod h1:4jWUdICTdgc3Ibxmr8nAJiiLHwQBY0UI0XZcEMaFKaA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 h1:AjyfHzEPEFp/NpvfN5g+KDla3EMojjhRVZc1i7cj+oM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80/go.mod h1:PAREbraiVEVGVdTZsVWjSbbTtSyGbAgIIvni8a8CD5s=
+google.golang.org/grpc v1.62.0 h1:HQKZ/fa1bXkX1oFOvSjmZEUL8wLSaZTjCcLAlmZRtdk=
+google.golang.org/grpc v1.62.0/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
 google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/example/otel-collector/k8s/jaeger.yaml b/example/otel-collector/k8s/jaeger.yaml
index 56558aee24c..37eaa964ce6 100644
--- a/example/otel-collector/k8s/jaeger.yaml
+++ b/example/otel-collector/k8s/jaeger.yaml
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 apiVersion: jaegertracing.io/v1
 kind: Jaeger
diff --git a/example/otel-collector/k8s/namespace.yaml b/example/otel-collector/k8s/namespace.yaml
index c31ad1c9dcc..bca2937f8e9 100644
--- a/example/otel-collector/k8s/namespace.yaml
+++ b/example/otel-collector/k8s/namespace.yaml
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 apiVersion: v1
 kind: Namespace
diff --git a/example/otel-collector/k8s/otel-collector.yaml b/example/otel-collector/k8s/otel-collector.yaml
index c6497a0d282..2c0e3b74ed2 100644
--- a/example/otel-collector/k8s/otel-collector.yaml
+++ b/example/otel-collector/k8s/otel-collector.yaml
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 apiVersion: v1
 kind: ConfigMap
diff --git a/example/otel-collector/k8s/prometheus-monitor.yaml b/example/otel-collector/k8s/prometheus-monitor.yaml
index 88d639a090c..125961447f6 100644
--- a/example/otel-collector/k8s/prometheus-monitor.yaml
+++ b/example/otel-collector/k8s/prometheus-monitor.yaml
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 apiVersion: monitoring.coreos.com/v1
 kind: Prometheus
diff --git a/example/otel-collector/k8s/prometheus-service.yaml b/example/otel-collector/k8s/prometheus-service.yaml
index 87634773e84..33156834a5e 100644
--- a/example/otel-collector/k8s/prometheus-service.yaml
+++ b/example/otel-collector/k8s/prometheus-service.yaml
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 apiVersion: monitoring.coreos.com/v1
 kind: ServiceMonitor
diff --git a/example/otel-collector/main.go b/example/otel-collector/main.go
index dc0d727ef8e..3e080d68dec 100644
--- a/example/otel-collector/main.go
+++ b/example/otel-collector/main.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Example using OTLP exporters + collector + third-party backends. For
 // information about using the exporter, see:
diff --git a/example/passthrough/go.mod b/example/passthrough/go.mod
index b06d1387b30..fc2e9a1e438 100644
--- a/example/passthrough/go.mod
+++ b/example/passthrough/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/example/passthrough
 
-go 1.20
+go 1.21
 
 require (
 	go.opentelemetry.io/otel v1.24.0
diff --git a/example/passthrough/go.sum b/example/passthrough/go.sum
index 8bc156d8db0..6a60a259fce 100644
--- a/example/passthrough/go.sum
+++ b/example/passthrough/go.sum
@@ -1,12 +1,17 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
 github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/example/passthrough/handler/handler.go b/example/passthrough/handler/handler.go
index b199dd2cf94..c2b4a31085d 100644
--- a/example/passthrough/handler/handler.go
+++ b/example/passthrough/handler/handler.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package handler // import "go.opentelemetry.io/otel/example/passthrough/handler"
 
diff --git a/example/passthrough/main.go b/example/passthrough/main.go
index edd8f443016..e35044861f9 100644
--- a/example/passthrough/main.go
+++ b/example/passthrough/main.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package main
 
diff --git a/example/prometheus/doc.go b/example/prometheus/doc.go
index b272a494874..7e07c5888da 100644
--- a/example/prometheus/doc.go
+++ b/example/prometheus/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package main provides a code sample of the Prometheus exporter.
 package main
diff --git a/example/prometheus/go.mod b/example/prometheus/go.mod
index 71d1bb62f06..2043fec5d4a 100644
--- a/example/prometheus/go.mod
+++ b/example/prometheus/go.mod
@@ -1,9 +1,9 @@
 module go.opentelemetry.io/otel/example/prometheus
 
-go 1.20
+go 1.21
 
 require (
-	github.com/prometheus/client_golang v1.18.0
+	github.com/prometheus/client_golang v1.19.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/exporters/prometheus v0.46.0
 	go.opentelemetry.io/otel/metric v1.24.0
@@ -15,9 +15,8 @@ require (
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
 	github.com/prometheus/client_model v0.6.0 // indirect
-	github.com/prometheus/common v0.45.0 // indirect
+	github.com/prometheus/common v0.48.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
diff --git a/example/prometheus/go.sum b/example/prometheus/go.sum
index 6a767b8484b..45020259491 100644
--- a/example/prometheus/go.sum
+++ b/example/prometheus/go.sum
@@ -3,26 +3,29 @@ github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6r
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
 github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 h1:jWpvCLoY8Z/e3VKvlsiIGKtc+UG6U5vzxaoagmhXfyg=
-github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0/go.mod h1:QUyp042oQthUoa9bqDv0ER0wrtXnBruoNd7aNjkbP+k=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/prometheus/client_golang v1.18.0 h1:HzFfmkOzH5Q8L8G+kSJKUx5dtG87sewO+FoDDqP5Tbk=
-github.com/prometheus/client_golang v1.18.0/go.mod h1:T+GXkCk5wSJyOqMIzVgvvjFDlkOQntgjkJWKrN5txjA=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/prometheus/client_golang v1.19.0 h1:ygXvpU1AoN1MhdzckN+PyD9QJOSD4x7kmXYlnfbA6JU=
+github.com/prometheus/client_golang v1.19.0/go.mod h1:ZRM9uEAypZakd+q/x7+gmsvXdURP+DABIEIjnmDdp+k=
 github.com/prometheus/client_model v0.6.0 h1:k1v3CzpSRUTrKMppY35TLwPvxHqBu0bYgxZzqGIgaos=
 github.com/prometheus/client_model v0.6.0/go.mod h1:NTQHnmxFpouOD0DpvP4XujX3CdOAGQPoaGhyTchlyt8=
-github.com/prometheus/common v0.45.0 h1:2BGz0eBc2hdMDLnO/8n0jeB3oPrt2D08CekT0lneoxM=
-github.com/prometheus/common v0.45.0/go.mod h1:YJmSTw9BoKxJplESWWxlbyttQR4uaEcGyv9MZjVOJsY=
+github.com/prometheus/common v0.48.0 h1:QO8U2CdOzSn1BBsmXJXduaaW+dY/5QLjfB8svtSzKKE=
+github.com/prometheus/common v0.48.0/go.mod h1:0/KsvlIEfPQCQ5I2iNSAWKPZziNCvRs5EC6ILDTlAPc=
 github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k6Bo=
 github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
 google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/example/prometheus/main.go b/example/prometheus/main.go
index 777135cebc2..23d91f0aa18 100644
--- a/example/prometheus/main.go
+++ b/example/prometheus/main.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package main
 
diff --git a/example/zipkin/Dockerfile b/example/zipkin/Dockerfile
index 9d610763961..ca27de41252 100644
--- a/example/zipkin/Dockerfile
+++ b/example/zipkin/Dockerfile
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 FROM golang:1.22-alpine
 COPY . /go/src/github.com/open-telemetry/opentelemetry-go/
 WORKDIR /go/src/github.com/open-telemetry/opentelemetry-go/example/zipkin/
diff --git a/example/zipkin/docker-compose.yml b/example/zipkin/docker-compose.yml
index 3de0023d262..dab1a1cd7e6 100644
--- a/example/zipkin/docker-compose.yml
+++ b/example/zipkin/docker-compose.yml
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 version: "3.7"
 services:
   zipkin-collector:
diff --git a/example/zipkin/go.mod b/example/zipkin/go.mod
index be39ee6e881..12cdb8b2c01 100644
--- a/example/zipkin/go.mod
+++ b/example/zipkin/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/example/zipkin
 
-go 1.20
+go 1.21
 
 replace (
 	go.opentelemetry.io/otel => ../..
diff --git a/example/zipkin/go.sum b/example/zipkin/go.sum
index 9a3217a09b2..06ab880657c 100644
--- a/example/zipkin/go.sum
+++ b/example/zipkin/go.sum
@@ -1,14 +1,19 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
 github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/openzipkin/zipkin-go v0.4.2 h1:zjqfqHjUpPmB3c1GlCvvgsM1G4LkvqQbBDueDOCg/jA=
 github.com/openzipkin/zipkin-go v0.4.2/go.mod h1:ZeVkFjuuBiSy13y8vpSDCjMi9GoI3hPpCJSBx/EYFhY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/example/zipkin/main.go b/example/zipkin/main.go
index 1f2c6def86a..81326383d5d 100644
--- a/example/zipkin/main.go
+++ b/example/zipkin/main.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Command zipkin is an example program that creates spans
 // and uploads to openzipkin collector.
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/client.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/client.go
index 16f9af12b66..e5a96270b52 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/client.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/client.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/client_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/client_test.go
index 109d5e5a030..c323175b1f5 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/client_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/client_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetricgrpc
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/config.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/config.go
index 9269f5a01b7..ef2746705b5 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/config.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/doc.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/doc.go
index 48e63689e00..df6e3459571 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/doc.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package otlpmetricgrpc provides an OTLP metrics exporter using gRPC.
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/example_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/example_test.go
index 8307b51fc69..3fef08c071a 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/example_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetricgrpc_test
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter.go
index 826276ba392..462dc8a7a0d 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter_test.go
index 6bb91b6ca09..59f72ea284c 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/go.mod b/exporters/otlp/otlpmetric/otlpmetricgrpc/go.mod
index e702ea9a667..42706a3f7be 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/go.mod
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/go.mod
@@ -1,19 +1,19 @@
 module go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc
 
-go 1.20
+go 1.21
 
 retract v0.32.2 // Contains unresolvable dependencies.
 
 require (
 	github.com/cenkalti/backoff/v4 v4.2.1
 	github.com/google/go-cmp v0.6.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/sdk/metric v1.24.0
 	go.opentelemetry.io/proto/otlp v1.1.0
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917
-	google.golang.org/grpc v1.61.1
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80
+	google.golang.org/grpc v1.62.0
 	google.golang.org/protobuf v1.32.0
 )
 
@@ -28,10 +28,10 @@ require (
 	github.com/rogpeppe/go-internal v1.11.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/net v0.20.0 // indirect
 	golang.org/x/sys v0.17.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/go.sum b/exporters/otlp/otlpmetric/otlpmetricgrpc/go.sum
index cccb45af00b..ee4a05c318b 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/go.sum
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/go.sum
@@ -17,35 +17,38 @@ github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 h1:Wqo399gCIufwto+VfwCSvsnfGpF/w5E9CNxSwbpD6No=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0/go.mod h1:qmOFXW2epJhM0qSnUUYpldc7gVz2KMQwJ/QYCDIa7XU=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
 github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opentelemetry.io/proto/otlp v1.1.0 h1:2Di21piLrCqJ3U3eXGCTPHE9R8Nh+0uglSnOyxikMeI=
 go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7ej/RNTae6MdY=
-golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
-golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto v0.0.0-20231212172506-995d672761c0 h1:YJ5pD9rF8o9Qtta0Cmy9rdBwkSjrTCT6XTiUQVOtIos=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 h1:rcS6EyEaoCO52hQDupoSfrxI3R6C2Tq741is7X8OvnM=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917/go.mod h1:CmlNWB9lSezaYELKS5Ym1r44VrrbPUa7JTvw+6MbpJ0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917 h1:6G8oQ016D88m1xAKljMlBOOGWDZkes4kMhgGFlf8WcQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917/go.mod h1:xtjpI3tXFPP051KaWnhvxkiubL/6dJ18vLVf7q2pTOU=
-google.golang.org/grpc v1.61.1 h1:kLAiWrZs7YeDM6MumDe7m3y4aM6wacLzM1Y/wiLP9XY=
-google.golang.org/grpc v1.61.1/go.mod h1:VUbo7IFqmF1QtCAstipjG0GIoq49KvMe9+h1jFLBNJs=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80 h1:KAeGQVN3M9nD0/bQXnr/ClcEMJ968gUXJQ9pwfSynuQ=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80/go.mod h1:cc8bqMqtv9gMOr0zHg2Vzff5ULhhL2IXP4sbcn32Dro=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 h1:Lj5rbfG876hIAYFjqiJnPHfhXbv+nzTWfm04Fg/XSVU=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80/go.mod h1:4jWUdICTdgc3Ibxmr8nAJiiLHwQBY0UI0XZcEMaFKaA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 h1:AjyfHzEPEFp/NpvfN5g+KDla3EMojjhRVZc1i7cj+oM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80/go.mod h1:PAREbraiVEVGVdTZsVWjSbbTtSyGbAgIIvni8a8CD5s=
+google.golang.org/grpc v1.62.0 h1:HQKZ/fa1bXkX1oFOvSjmZEUL8wLSaZTjCcLAlmZRtdk=
+google.golang.org/grpc v1.62.0/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
 google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig.go
index 17951ceb451..b2735ba923c 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig_test.go
index 6cbe0c7ab11..14543ea11eb 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/gen.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/gen.go
index 06718efa898..95e2f4ba3b0 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/gen.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/gen.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig.go
index ae100513bad..7ae53f2d181 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig_test.go
index b3f9f9c3714..5c621d7b47e 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/envconfig_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options.go
index 9b1a76b2d2c..b6ed9a2bb65 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/options.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options_test.go
index dfb9d7712db..a24a9544556 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/optiontypes.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/optiontypes.go
index 8a3c8422e1b..83f6d7fd1a7 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/optiontypes.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/optiontypes.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/tls.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/tls.go
index 2e36e0b6f25..0229ac80bef 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/tls.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/tls.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client.go
index 1a8350c2488..0ba939375dc 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/client.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client_test.go
index e325f16b97e..59111d05aeb 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/client_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/collector.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/collector.go
index f08fbd5c5f7..6eea8d39a75 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/collector.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/collector.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/collector.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess.go
index f4d48198251..50e25fdbc72 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess_test.go
index c385c4d428e..740e2a468e4 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess_test.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry.go
index 689779c3604..b552333dbb2 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package retry provides request retry functionality that can perform
 // configurable exponential backoff for transient errors and honor any
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry_test.go
index 9279c7c00ff..b48dde62359 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package retry
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/attribute.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/attribute.go
index e80798eebde..2605c74d054 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/attribute.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/attribute.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/attribute.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/attribute_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/attribute_test.go
index 57db7ab797b..0815ba988d2 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/attribute_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/attribute_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/attribute_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error.go
index d5d2fdcb7ea..fb009ba21cf 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/error.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error_test.go
index 03e16ef8f14..be53e29e66e 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/metricdata.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/metricdata.go
index 80f03b4b420..2494337feeb 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/metricdata.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/metricdata.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/metricdata.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package transform provides transformation functionality from the
 // sdk/metric/metricdata data-types into OTLP data-types.
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/metricdata_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/metricdata_test.go
index 2ce09fe6c29..d2770158d05 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/metricdata_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/metricdata_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/metricdata_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/version.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/version.go
index a4ce4da3e3e..e45b6e98cf8 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/version.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/version.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetricgrpc/version_test.go b/exporters/otlp/otlpmetric/otlpmetricgrpc/version_test.go
index 9b7f0544ad5..fca12bf56ed 100644
--- a/exporters/otlp/otlpmetric/otlpmetricgrpc/version_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetricgrpc/version_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetricgrpc
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/client.go b/exporters/otlp/otlpmetric/otlpmetrichttp/client.go
index 5f3c7144c8d..e3ba7dea05f 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/client.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/client.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetrichttp // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/client_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/client_test.go
index 5d302d51159..2838fd9d011 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/client_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/client_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetrichttp
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/config.go b/exporters/otlp/otlpmetric/otlpmetrichttp/config.go
index e5f1ce9c389..8c685d3011d 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/config.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetrichttp // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/doc.go b/exporters/otlp/otlpmetric/otlpmetrichttp/doc.go
index a707b5ebb71..93d843d348c 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/doc.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package otlpmetrichttp provides an OTLP metrics exporter using HTTP with protobuf payloads.
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/example_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/example_test.go
index 398c834a5f1..2d08e986c04 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/example_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetrichttp_test
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/exporter.go b/exporters/otlp/otlpmetric/otlpmetrichttp/exporter.go
index 96991ede5c7..442d8096103 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/exporter.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetrichttp // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/exporter_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/exporter_test.go
index 4af2ab43375..8234bf0e22a 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/exporter_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/exporter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetrichttp // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/go.mod b/exporters/otlp/otlpmetric/otlpmetrichttp/go.mod
index c0035187322..44a9e3c4773 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/go.mod
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/go.mod
@@ -1,18 +1,18 @@
 module go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp
 
-go 1.20
+go 1.21
 
 retract v0.32.2 // Contains unresolvable dependencies.
 
 require (
 	github.com/cenkalti/backoff/v4 v4.2.1
 	github.com/google/go-cmp v0.6.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/sdk/metric v1.24.0
 	go.opentelemetry.io/proto/otlp v1.1.0
-	google.golang.org/grpc v1.61.1
+	google.golang.org/grpc v1.62.0
 	google.golang.org/protobuf v1.32.0
 )
 
@@ -27,11 +27,11 @@ require (
 	github.com/rogpeppe/go-internal v1.11.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/net v0.20.0 // indirect
 	golang.org/x/sys v0.17.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/go.sum b/exporters/otlp/otlpmetric/otlpmetrichttp/go.sum
index cccb45af00b..ee4a05c318b 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/go.sum
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/go.sum
@@ -17,35 +17,38 @@ github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 h1:Wqo399gCIufwto+VfwCSvsnfGpF/w5E9CNxSwbpD6No=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0/go.mod h1:qmOFXW2epJhM0qSnUUYpldc7gVz2KMQwJ/QYCDIa7XU=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
 github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opentelemetry.io/proto/otlp v1.1.0 h1:2Di21piLrCqJ3U3eXGCTPHE9R8Nh+0uglSnOyxikMeI=
 go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7ej/RNTae6MdY=
-golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
-golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto v0.0.0-20231212172506-995d672761c0 h1:YJ5pD9rF8o9Qtta0Cmy9rdBwkSjrTCT6XTiUQVOtIos=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 h1:rcS6EyEaoCO52hQDupoSfrxI3R6C2Tq741is7X8OvnM=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917/go.mod h1:CmlNWB9lSezaYELKS5Ym1r44VrrbPUa7JTvw+6MbpJ0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917 h1:6G8oQ016D88m1xAKljMlBOOGWDZkes4kMhgGFlf8WcQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917/go.mod h1:xtjpI3tXFPP051KaWnhvxkiubL/6dJ18vLVf7q2pTOU=
-google.golang.org/grpc v1.61.1 h1:kLAiWrZs7YeDM6MumDe7m3y4aM6wacLzM1Y/wiLP9XY=
-google.golang.org/grpc v1.61.1/go.mod h1:VUbo7IFqmF1QtCAstipjG0GIoq49KvMe9+h1jFLBNJs=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80 h1:KAeGQVN3M9nD0/bQXnr/ClcEMJ968gUXJQ9pwfSynuQ=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80/go.mod h1:cc8bqMqtv9gMOr0zHg2Vzff5ULhhL2IXP4sbcn32Dro=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 h1:Lj5rbfG876hIAYFjqiJnPHfhXbv+nzTWfm04Fg/XSVU=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80/go.mod h1:4jWUdICTdgc3Ibxmr8nAJiiLHwQBY0UI0XZcEMaFKaA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 h1:AjyfHzEPEFp/NpvfN5g+KDla3EMojjhRVZc1i7cj+oM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80/go.mod h1:PAREbraiVEVGVdTZsVWjSbbTtSyGbAgIIvni8a8CD5s=
+google.golang.org/grpc v1.62.0 h1:HQKZ/fa1bXkX1oFOvSjmZEUL8wLSaZTjCcLAlmZRtdk=
+google.golang.org/grpc v1.62.0/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
 google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig/envconfig.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig/envconfig.go
index 9dfb55c41bb..35885ba8a72 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig/envconfig.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig/envconfig.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig/envconfig_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig/envconfig_test.go
index 6cbe0c7ab11..14543ea11eb 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig/envconfig_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/envconfig/envconfig_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/gen.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/gen.go
index 002c8b36b2e..1b379f10c5e 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/gen.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/gen.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/envconfig.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/envconfig.go
index 2bab35be6c4..89b134a39fb 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/envconfig.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/envconfig.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/envconfig_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/envconfig_test.go
index b3f9f9c3714..5c621d7b47e 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/envconfig_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/envconfig_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/envconfig_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options.go
index 927592e595c..9bbf0941f94 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/options.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options_test.go
index 70595ef3113..3401f8ec524 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/optiontypes.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/optiontypes.go
index f8805e31d62..ae3d0978703 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/optiontypes.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/optiontypes.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/tls.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/tls.go
index 15cbec25850..ae09ad57e16 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/tls.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/tls.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client.go
index a47a9422b55..9f6e6122fcc 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/client.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client_test.go
index 72f4f40b116..ccf3a578d70 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/client_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/collector.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/collector.go
index 6398f8ba5ba..178dcde6c36 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/collector.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/collector.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/collector.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/partialsuccess.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/partialsuccess.go
index 584785778ac..ed93844a4e7 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/partialsuccess.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/partialsuccess.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/partialsuccess_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/partialsuccess_test.go
index c385c4d428e..740e2a468e4 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/partialsuccess_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/partialsuccess_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess_test.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/retry/retry.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/retry/retry.go
index c8d2a6ddfc7..ea4cff080fc 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/retry/retry.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/retry/retry.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package retry provides request retry functionality that can perform
 // configurable exponential backoff for transient errors and honor any
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/retry/retry_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/retry/retry_test.go
index 9279c7c00ff..b48dde62359 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/retry/retry_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/retry/retry_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package retry
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/attribute.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/attribute.go
index 7fcc144c1cd..d607da78eaf 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/attribute.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/attribute.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/attribute.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/attribute_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/attribute_test.go
index 57db7ab797b..0815ba988d2 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/attribute_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/attribute_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/attribute_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error.go
index 0b5446e4d07..60d0d1f72ae 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/error.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error_test.go
index 03e16ef8f14..be53e29e66e 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/metricdata.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/metricdata.go
index c8ab8dbf6a5..d6845171758 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/metricdata.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/metricdata.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/metricdata.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package transform provides transformation functionality from the
 // sdk/metric/metricdata data-types into OTLP data-types.
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/metricdata_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/metricdata_test.go
index 2ce09fe6c29..d2770158d05 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/metricdata_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/metricdata_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/metricdata_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/version.go b/exporters/otlp/otlpmetric/otlpmetrichttp/version.go
index 3538f8a7d0e..c75bb84dfd1 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/version.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/version.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetrichttp // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp"
 
diff --git a/exporters/otlp/otlpmetric/otlpmetrichttp/version_test.go b/exporters/otlp/otlpmetric/otlpmetrichttp/version_test.go
index 73091976fcc..eabecf5953f 100644
--- a/exporters/otlp/otlpmetric/otlpmetrichttp/version_test.go
+++ b/exporters/otlp/otlpmetric/otlpmetrichttp/version_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpmetrichttp
 
diff --git a/exporters/otlp/otlptrace/clients.go b/exporters/otlp/otlptrace/clients.go
index dbb40cf5820..3c1a625c067 100644
--- a/exporters/otlp/otlptrace/clients.go
+++ b/exporters/otlp/otlptrace/clients.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
 
diff --git a/exporters/otlp/otlptrace/doc.go b/exporters/otlp/otlptrace/doc.go
index 9e642235ade..09ad5eadb6f 100644
--- a/exporters/otlp/otlptrace/doc.go
+++ b/exporters/otlp/otlptrace/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package otlptrace contains abstractions for OTLP span exporters.
diff --git a/exporters/otlp/otlptrace/exporter.go b/exporters/otlp/otlptrace/exporter.go
index cb41c7d58f2..3f0a518ae0f 100644
--- a/exporters/otlp/otlptrace/exporter.go
+++ b/exporters/otlp/otlptrace/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
 
diff --git a/exporters/otlp/otlptrace/exporter_test.go b/exporters/otlp/otlptrace/exporter_test.go
index 1007d23a7e2..55d030b94b6 100644
--- a/exporters/otlp/otlptrace/exporter_test.go
+++ b/exporters/otlp/otlptrace/exporter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptrace_test
 
diff --git a/exporters/otlp/otlptrace/go.mod b/exporters/otlp/otlptrace/go.mod
index bf91621c2e8..f4da96602a5 100644
--- a/exporters/otlp/otlptrace/go.mod
+++ b/exporters/otlp/otlptrace/go.mod
@@ -1,10 +1,10 @@
 module go.opentelemetry.io/otel/exporters/otlp/otlptrace
 
-go 1.20
+go 1.21
 
 require (
 	github.com/google/go-cmp v0.6.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
diff --git a/exporters/otlp/otlptrace/go.sum b/exporters/otlp/otlptrace/go.sum
index ea26e3d25fb..32b7e498168 100644
--- a/exporters/otlp/otlptrace/go.sum
+++ b/exporters/otlp/otlptrace/go.sum
@@ -21,8 +21,8 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opentelemetry.io/proto/otlp v1.1.0 h1:2Di21piLrCqJ3U3eXGCTPHE9R8Nh+0uglSnOyxikMeI=
 go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7ej/RNTae6MdY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
diff --git a/exporters/otlp/otlptrace/internal/tracetransform/attribute.go b/exporters/otlp/otlptrace/internal/tracetransform/attribute.go
index ec74f1aad75..4571a5ca397 100644
--- a/exporters/otlp/otlptrace/internal/tracetransform/attribute.go
+++ b/exporters/otlp/otlptrace/internal/tracetransform/attribute.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
 
diff --git a/exporters/otlp/otlptrace/internal/tracetransform/attribute_test.go b/exporters/otlp/otlptrace/internal/tracetransform/attribute_test.go
index 3f335f12392..d67e3f0ec4d 100644
--- a/exporters/otlp/otlptrace/internal/tracetransform/attribute_test.go
+++ b/exporters/otlp/otlptrace/internal/tracetransform/attribute_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetransform
 
diff --git a/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go b/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go
index 7aaec38d22a..f6dd3decc90 100644
--- a/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go
+++ b/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
 
diff --git a/exporters/otlp/otlptrace/internal/tracetransform/resource.go b/exporters/otlp/otlptrace/internal/tracetransform/resource.go
index 05a1f78adbc..db7b698a566 100644
--- a/exporters/otlp/otlptrace/internal/tracetransform/resource.go
+++ b/exporters/otlp/otlptrace/internal/tracetransform/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
 
diff --git a/exporters/otlp/otlptrace/internal/tracetransform/resource_test.go b/exporters/otlp/otlptrace/internal/tracetransform/resource_test.go
index f214cd6f891..ef82a8a4d2e 100644
--- a/exporters/otlp/otlptrace/internal/tracetransform/resource_test.go
+++ b/exporters/otlp/otlptrace/internal/tracetransform/resource_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetransform
 
diff --git a/exporters/otlp/otlptrace/internal/tracetransform/span.go b/exporters/otlp/otlptrace/internal/tracetransform/span.go
index b83cbd72478..e03bf46a5ad 100644
--- a/exporters/otlp/otlptrace/internal/tracetransform/span.go
+++ b/exporters/otlp/otlptrace/internal/tracetransform/span.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
 
diff --git a/exporters/otlp/otlptrace/internal/tracetransform/span_test.go b/exporters/otlp/otlptrace/internal/tracetransform/span_test.go
index 546ab60e538..f22ebab7b77 100644
--- a/exporters/otlp/otlptrace/internal/tracetransform/span_test.go
+++ b/exporters/otlp/otlptrace/internal/tracetransform/span_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetransform
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/client.go b/exporters/otlp/otlptrace/otlptracegrpc/client.go
index b4cc21d7a3c..94e2cb86dfd 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/client.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/client.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/client_test.go b/exporters/otlp/otlptrace/otlptracegrpc/client_test.go
index d0d06506d06..46d08c238ab 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/client_test.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/client_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//	http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracegrpc_test
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/client_unit_test.go b/exporters/otlp/otlptrace/otlptracegrpc/client_unit_test.go
index df27a208daf..5391030d7df 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/client_unit_test.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/client_unit_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracegrpc
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/doc.go b/exporters/otlp/otlptrace/otlptracegrpc/doc.go
index a3c2690c5d0..3709d7dcf03 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/doc.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package otlptracegrpc provides an OTLP span exporter using gRPC.
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/example_test.go b/exporters/otlp/otlptrace/otlptracegrpc/example_test.go
index ee03d1b505a..40bc173c870 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/example_test.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracegrpc_test
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/exporter.go b/exporters/otlp/otlptrace/otlptracegrpc/exporter.go
index 89af41002f7..b826b84247e 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/exporter.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/go.mod b/exporters/otlp/otlptrace/otlptracegrpc/go.mod
index 8b4729b811d..8a8599f0870 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/go.mod
+++ b/exporters/otlp/otlptrace/otlptracegrpc/go.mod
@@ -1,18 +1,18 @@
 module go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc
 
-go 1.20
+go 1.21
 
 require (
 	github.com/cenkalti/backoff/v4 v4.2.1
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
 	go.opentelemetry.io/proto/otlp v1.1.0
 	go.uber.org/goleak v1.3.0
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917
-	google.golang.org/grpc v1.61.1
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80
+	google.golang.org/grpc v1.62.0
 	google.golang.org/protobuf v1.32.0
 )
 
@@ -25,10 +25,10 @@ require (
 	github.com/kr/text v0.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/net v0.20.0 // indirect
 	golang.org/x/sys v0.17.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/go.sum b/exporters/otlp/otlptrace/otlptracegrpc/go.sum
index 9a3c1868c33..96cffd31b9f 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/go.sum
+++ b/exporters/otlp/otlptrace/otlptracegrpc/go.sum
@@ -13,39 +13,44 @@ github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 h1:Wqo399gCIufwto+VfwCSvsnfGpF/w5E9CNxSwbpD6No=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0/go.mod h1:qmOFXW2epJhM0qSnUUYpldc7gVz2KMQwJ/QYCDIa7XU=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opentelemetry.io/proto/otlp v1.1.0 h1:2Di21piLrCqJ3U3eXGCTPHE9R8Nh+0uglSnOyxikMeI=
 go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7ej/RNTae6MdY=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
-golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto v0.0.0-20231212172506-995d672761c0 h1:YJ5pD9rF8o9Qtta0Cmy9rdBwkSjrTCT6XTiUQVOtIos=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 h1:rcS6EyEaoCO52hQDupoSfrxI3R6C2Tq741is7X8OvnM=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917/go.mod h1:CmlNWB9lSezaYELKS5Ym1r44VrrbPUa7JTvw+6MbpJ0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917 h1:6G8oQ016D88m1xAKljMlBOOGWDZkes4kMhgGFlf8WcQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917/go.mod h1:xtjpI3tXFPP051KaWnhvxkiubL/6dJ18vLVf7q2pTOU=
-google.golang.org/grpc v1.61.1 h1:kLAiWrZs7YeDM6MumDe7m3y4aM6wacLzM1Y/wiLP9XY=
-google.golang.org/grpc v1.61.1/go.mod h1:VUbo7IFqmF1QtCAstipjG0GIoq49KvMe9+h1jFLBNJs=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80 h1:KAeGQVN3M9nD0/bQXnr/ClcEMJ968gUXJQ9pwfSynuQ=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80/go.mod h1:cc8bqMqtv9gMOr0zHg2Vzff5ULhhL2IXP4sbcn32Dro=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 h1:Lj5rbfG876hIAYFjqiJnPHfhXbv+nzTWfm04Fg/XSVU=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80/go.mod h1:4jWUdICTdgc3Ibxmr8nAJiiLHwQBY0UI0XZcEMaFKaA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 h1:AjyfHzEPEFp/NpvfN5g+KDla3EMojjhRVZc1i7cj+oM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80/go.mod h1:PAREbraiVEVGVdTZsVWjSbbTtSyGbAgIIvni8a8CD5s=
+google.golang.org/grpc v1.62.0 h1:HQKZ/fa1bXkX1oFOvSjmZEUL8wLSaZTjCcLAlmZRtdk=
+google.golang.org/grpc v1.62.0/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
 google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig.go
index 5530119e4cf..9513c0a57ca 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig_test.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig_test.go
index 6cbe0c7ab11..14543ea11eb 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig_test.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/gen.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/gen.go
index 1fb29061894..97cd6c54f70 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/gen.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/gen.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/envconfig.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/envconfig.go
index 32f6dddb4f6..7bb189a94bc 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/envconfig.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/envconfig.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options.go
index 5f6936f015e..e3f7f431fe0 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options_test.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options_test.go
index 5bbe38969d2..87fd281dfc5 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options_test.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/options_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/optiontypes.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/optiontypes.go
index d9dcdc96e7d..3d4f699d477 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/optiontypes.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/optiontypes.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/tls.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/tls.go
index 19b6d4b21f9..38b97a01313 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/tls.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/tls.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/client.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/client.go
index ac85d0d52d0..4f70930465a 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/client.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/client.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/client.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/collector.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/collector.go
index a18618a05d7..0b30980a4da 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/collector.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/collector.go
@@ -2,23 +2,13 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/collector.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest"
 
 import (
-	"sort"
+	"cmp"
+	"slices"
 
 	collectortracepb "go.opentelemetry.io/proto/otlp/collector/trace/v1"
 	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
@@ -99,8 +89,8 @@ func resourceString(res *resourcepb.Resource) string {
 }
 
 func sortedAttributes(attrs []*commonpb.KeyValue) []*commonpb.KeyValue {
-	sort.Slice(attrs[:], func(i, j int) bool {
-		return attrs[i].Key < attrs[j].Key
+	slices.SortFunc(attrs, func(a, b *commonpb.KeyValue) int {
+		return cmp.Compare(a.Key, b.Key)
 	})
 	return attrs
 }
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/data.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/data.go
index d9cb6ff5327..75837732cc9 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/data.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/data.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/data.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/otlptest.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/otlptest.go
index b27b147b9e9..dbe41b8c4e9 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/otlptest.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest/otlptest.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/otlptest.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlptracetest"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess.go
index 076905e54bf..a12ea4c48eb 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal"
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess_test.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess_test.go
index c385c4d428e..740e2a468e4 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess_test.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess_test.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry.go
index 3ce7d6632b8..4f2113ae2cf 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package retry provides request retry functionality that can perform
 // configurable exponential backoff for transient errors and honor any
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry_test.go b/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry_test.go
index 9279c7c00ff..b48dde62359 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry_test.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package retry
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/mock_collector_test.go b/exporters/otlp/otlptrace/otlptracegrpc/mock_collector_test.go
index ffd14ab6b9d..5c59907cd14 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/mock_collector_test.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/mock_collector_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracegrpc_test
 
diff --git a/exporters/otlp/otlptrace/otlptracegrpc/options.go b/exporters/otlp/otlptrace/otlptracegrpc/options.go
index 461610c6b95..d7559bfb5a1 100644
--- a/exporters/otlp/otlptrace/otlptracegrpc/options.go
+++ b/exporters/otlp/otlptrace/otlptracegrpc/options.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/certificate_test.go b/exporters/otlp/otlptrace/otlptracehttp/certificate_test.go
index b164d754381..c3f981c6f86 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/certificate_test.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/certificate_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracehttp_test
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/client.go b/exporters/otlp/otlptrace/otlptracehttp/client.go
index 60d1681ccc9..54ba0ebab73 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/client.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/client.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracehttp // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/client_test.go b/exporters/otlp/otlptrace/otlptracehttp/client_test.go
index b4bc2f4cfa5..0494f82c9a7 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/client_test.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/client_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracehttp_test
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/doc.go b/exporters/otlp/otlptrace/otlptracehttp/doc.go
index cb4f19ad16b..18843d62945 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/doc.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package otlptracehttp provides an OTLP span exporter using HTTP with protobuf payloads.
diff --git a/exporters/otlp/otlptrace/otlptracehttp/example_test.go b/exporters/otlp/otlptrace/otlptracehttp/example_test.go
index d67bdf5afea..6d7fd4df1b1 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/example_test.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracehttp_test
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/exporter.go b/exporters/otlp/otlptrace/otlptracehttp/exporter.go
index 23b8642040d..fae89ea4fe6 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/exporter.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracehttp // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/go.mod b/exporters/otlp/otlptrace/otlptracehttp/go.mod
index 675dbf642d1..d079b79718f 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/go.mod
+++ b/exporters/otlp/otlptrace/otlptracehttp/go.mod
@@ -1,16 +1,16 @@
 module go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp
 
-go 1.20
+go 1.21
 
 require (
 	github.com/cenkalti/backoff/v4 v4.2.1
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
 	go.opentelemetry.io/proto/otlp v1.1.0
-	google.golang.org/grpc v1.61.1
+	google.golang.org/grpc v1.62.0
 	google.golang.org/protobuf v1.32.0
 )
 
@@ -23,11 +23,11 @@ require (
 	github.com/kr/text v0.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/net v0.20.0 // indirect
 	golang.org/x/sys v0.17.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/go.sum b/exporters/otlp/otlptrace/otlptracehttp/go.sum
index f65af23c279..de2668d0b61 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/go.sum
+++ b/exporters/otlp/otlptrace/otlptracehttp/go.sum
@@ -13,37 +13,42 @@ github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 h1:Wqo399gCIufwto+VfwCSvsnfGpF/w5E9CNxSwbpD6No=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0/go.mod h1:qmOFXW2epJhM0qSnUUYpldc7gVz2KMQwJ/QYCDIa7XU=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go.opentelemetry.io/proto/otlp v1.1.0 h1:2Di21piLrCqJ3U3eXGCTPHE9R8Nh+0uglSnOyxikMeI=
 go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7ej/RNTae6MdY=
-golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
-golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto v0.0.0-20231212172506-995d672761c0 h1:YJ5pD9rF8o9Qtta0Cmy9rdBwkSjrTCT6XTiUQVOtIos=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917 h1:rcS6EyEaoCO52hQDupoSfrxI3R6C2Tq741is7X8OvnM=
-google.golang.org/genproto/googleapis/api v0.0.0-20240102182953-50ed04b92917/go.mod h1:CmlNWB9lSezaYELKS5Ym1r44VrrbPUa7JTvw+6MbpJ0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917 h1:6G8oQ016D88m1xAKljMlBOOGWDZkes4kMhgGFlf8WcQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240102182953-50ed04b92917/go.mod h1:xtjpI3tXFPP051KaWnhvxkiubL/6dJ18vLVf7q2pTOU=
-google.golang.org/grpc v1.61.1 h1:kLAiWrZs7YeDM6MumDe7m3y4aM6wacLzM1Y/wiLP9XY=
-google.golang.org/grpc v1.61.1/go.mod h1:VUbo7IFqmF1QtCAstipjG0GIoq49KvMe9+h1jFLBNJs=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80 h1:KAeGQVN3M9nD0/bQXnr/ClcEMJ968gUXJQ9pwfSynuQ=
+google.golang.org/genproto v0.0.0-20240123012728-ef4313101c80/go.mod h1:cc8bqMqtv9gMOr0zHg2Vzff5ULhhL2IXP4sbcn32Dro=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80 h1:Lj5rbfG876hIAYFjqiJnPHfhXbv+nzTWfm04Fg/XSVU=
+google.golang.org/genproto/googleapis/api v0.0.0-20240123012728-ef4313101c80/go.mod h1:4jWUdICTdgc3Ibxmr8nAJiiLHwQBY0UI0XZcEMaFKaA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 h1:AjyfHzEPEFp/NpvfN5g+KDla3EMojjhRVZc1i7cj+oM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80/go.mod h1:PAREbraiVEVGVdTZsVWjSbbTtSyGbAgIIvni8a8CD5s=
+google.golang.org/grpc v1.62.0 h1:HQKZ/fa1bXkX1oFOvSjmZEUL8wLSaZTjCcLAlmZRtdk=
+google.golang.org/grpc v1.62.0/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
 google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig.go b/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig.go
index 8016b7a0b88..26a316d003d 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig_test.go b/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig_test.go
index 6cbe0c7ab11..14543ea11eb 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig_test.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/gen.go b/exporters/otlp/otlptrace/otlptracehttp/internal/gen.go
index 01347d8c651..e4142b9d7c5 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/gen.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/gen.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/envconfig.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/envconfig.go
index 45f137a7872..ff4141b6dc8 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/envconfig.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/envconfig.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options.go
index 0a98da5cdd9..45fefc4dd8c 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options_test.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options_test.go
index 72b57202410..1df421a34dc 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options_test.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/options_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/optiontypes.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/optiontypes.go
index 8625674855d..bc4db059524 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/optiontypes.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/optiontypes.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/tls.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/tls.go
index c342f7d6831..dd6f12b220b 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/tls.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/tls.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/client.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/client.go
index 3f9680064ec..04f235deb7e 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/client.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/client.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/client.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/collector.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/collector.go
index 4392c56314a..bcba6f6a302 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/collector.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/collector.go
@@ -2,23 +2,13 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/collector.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest"
 
 import (
-	"sort"
+	"cmp"
+	"slices"
 
 	collectortracepb "go.opentelemetry.io/proto/otlp/collector/trace/v1"
 	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
@@ -99,8 +89,8 @@ func resourceString(res *resourcepb.Resource) string {
 }
 
 func sortedAttributes(attrs []*commonpb.KeyValue) []*commonpb.KeyValue {
-	sort.Slice(attrs[:], func(i, j int) bool {
-		return attrs[i].Key < attrs[j].Key
+	slices.SortFunc(attrs, func(a, b *commonpb.KeyValue) int {
+		return cmp.Compare(a.Key, b.Key)
 	})
 	return attrs
 }
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/data.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/data.go
index 3db4640ca90..dd296c75c0e 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/data.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/data.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/data.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/otlptest.go b/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/otlptest.go
index c2887674c6a..1805264efc4 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/otlptest.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest/otlptest.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/otlptest.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlptracetest"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/partialsuccess.go b/exporters/otlp/otlptrace/otlptracehttp/internal/partialsuccess.go
index f051ad5d95c..9e04a9bc196 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/partialsuccess.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/partialsuccess.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal"
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/partialsuccess_test.go b/exporters/otlp/otlptrace/otlptracehttp/internal/partialsuccess_test.go
index c385c4d428e..740e2a468e4 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/partialsuccess_test.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/partialsuccess_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess_test.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/retry/retry.go b/exporters/otlp/otlptrace/otlptracehttp/internal/retry/retry.go
index 44974ff49bd..e3e6477832e 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/retry/retry.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/retry/retry.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package retry provides request retry functionality that can perform
 // configurable exponential backoff for transient errors and honor any
diff --git a/exporters/otlp/otlptrace/otlptracehttp/internal/retry/retry_test.go b/exporters/otlp/otlptrace/otlptracehttp/internal/retry/retry_test.go
index 9279c7c00ff..b48dde62359 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/internal/retry/retry_test.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/internal/retry/retry_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package retry
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/mock_collector_test.go b/exporters/otlp/otlptrace/otlptracehttp/mock_collector_test.go
index 2b87215d183..bf1140e5d50 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/mock_collector_test.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/mock_collector_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracehttp_test
 
diff --git a/exporters/otlp/otlptrace/otlptracehttp/options.go b/exporters/otlp/otlptrace/otlptracehttp/options.go
index c3edcbf17e4..ed204403b56 100644
--- a/exporters/otlp/otlptrace/otlptracehttp/options.go
+++ b/exporters/otlp/otlptrace/otlptracehttp/options.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracehttp // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
 
diff --git a/exporters/otlp/otlptrace/version.go b/exporters/otlp/otlptrace/version.go
index afc89644e63..e62b0101687 100644
--- a/exporters/otlp/otlptrace/version.go
+++ b/exporters/otlp/otlptrace/version.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
 
diff --git a/exporters/otlp/otlptrace/version_test.go b/exporters/otlp/otlptrace/version_test.go
index 62558d99751..4fd81033138 100644
--- a/exporters/otlp/otlptrace/version_test.go
+++ b/exporters/otlp/otlptrace/version_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptrace_test
 
diff --git a/exporters/prometheus/benchmark_test.go b/exporters/prometheus/benchmark_test.go
index 1d7139b5cc7..27e63309032 100644
--- a/exporters/prometheus/benchmark_test.go
+++ b/exporters/prometheus/benchmark_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package prometheus
 
diff --git a/exporters/prometheus/config.go b/exporters/prometheus/config.go
index 03ce27b131e..a10ab7f1df8 100644
--- a/exporters/prometheus/config.go
+++ b/exporters/prometheus/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package prometheus // import "go.opentelemetry.io/otel/exporters/prometheus"
 
diff --git a/exporters/prometheus/config_test.go b/exporters/prometheus/config_test.go
index b759cfe98f5..d0432cabada 100644
--- a/exporters/prometheus/config_test.go
+++ b/exporters/prometheus/config_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package prometheus // import "go.opentelemetry.io/otel/exporters/prometheus"
 
diff --git a/exporters/prometheus/doc.go b/exporters/prometheus/doc.go
index f212c6146cf..e9b77869ea5 100644
--- a/exporters/prometheus/doc.go
+++ b/exporters/prometheus/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package prometheus provides a Prometheus Exporter that converts
 // OTLP metrics into the Prometheus exposition format and implements
diff --git a/exporters/prometheus/exporter.go b/exporters/prometheus/exporter.go
index 16df309be44..ea09390c5ba 100644
--- a/exporters/prometheus/exporter.go
+++ b/exporters/prometheus/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package prometheus // import "go.opentelemetry.io/otel/exporters/prometheus"
 
@@ -18,7 +7,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"sort"
+	"slices"
 	"strings"
 	"sync"
 	"unicode"
@@ -324,9 +313,7 @@ func getAttrs(attrs attribute.Set, ks, vs [2]string, resourceKV keyVals) ([]stri
 	values := make([]string, 0, attrs.Len())
 	for key, vals := range keysMap {
 		keys = append(keys, key)
-		sort.Slice(vals, func(i, j int) bool {
-			return i < j
-		})
+		slices.Sort(vals)
 		values = append(values, strings.Join(vals, ";"))
 	}
 
diff --git a/exporters/prometheus/exporter_test.go b/exporters/prometheus/exporter_test.go
index c7961014c1f..ee052604eb1 100644
--- a/exporters/prometheus/exporter_test.go
+++ b/exporters/prometheus/exporter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package prometheus
 
diff --git a/exporters/prometheus/go.mod b/exporters/prometheus/go.mod
index 732507bfffd..9806a7d6e8f 100644
--- a/exporters/prometheus/go.mod
+++ b/exporters/prometheus/go.mod
@@ -1,11 +1,11 @@
 module go.opentelemetry.io/otel/exporters/prometheus
 
-go 1.20
+go 1.21
 
 require (
-	github.com/prometheus/client_golang v1.18.0
+	github.com/prometheus/client_golang v1.19.0
 	github.com/prometheus/client_model v0.6.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/metric v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
@@ -20,9 +20,8 @@ require (
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/kr/text v0.2.0 // indirect
-	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/common v0.45.0 // indirect
+	github.com/prometheus/common v0.48.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
 	golang.org/x/sys v0.17.0 // indirect
diff --git a/exporters/prometheus/go.sum b/exporters/prometheus/go.sum
index 466109a5d70..571f2b58ceb 100644
--- a/exporters/prometheus/go.sum
+++ b/exporters/prometheus/go.sum
@@ -11,29 +11,31 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 h1:jWpvCLoY8Z/e3VKvlsiIGKtc+UG6U5vzxaoagmhXfyg=
-github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0/go.mod h1:QUyp042oQthUoa9bqDv0ER0wrtXnBruoNd7aNjkbP+k=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.18.0 h1:HzFfmkOzH5Q8L8G+kSJKUx5dtG87sewO+FoDDqP5Tbk=
-github.com/prometheus/client_golang v1.18.0/go.mod h1:T+GXkCk5wSJyOqMIzVgvvjFDlkOQntgjkJWKrN5txjA=
+github.com/prometheus/client_golang v1.19.0 h1:ygXvpU1AoN1MhdzckN+PyD9QJOSD4x7kmXYlnfbA6JU=
+github.com/prometheus/client_golang v1.19.0/go.mod h1:ZRM9uEAypZakd+q/x7+gmsvXdURP+DABIEIjnmDdp+k=
 github.com/prometheus/client_model v0.6.0 h1:k1v3CzpSRUTrKMppY35TLwPvxHqBu0bYgxZzqGIgaos=
 github.com/prometheus/client_model v0.6.0/go.mod h1:NTQHnmxFpouOD0DpvP4XujX3CdOAGQPoaGhyTchlyt8=
-github.com/prometheus/common v0.45.0 h1:2BGz0eBc2hdMDLnO/8n0jeB3oPrt2D08CekT0lneoxM=
-github.com/prometheus/common v0.45.0/go.mod h1:YJmSTw9BoKxJplESWWxlbyttQR4uaEcGyv9MZjVOJsY=
+github.com/prometheus/common v0.48.0 h1:QO8U2CdOzSn1BBsmXJXduaaW+dY/5QLjfB8svtSzKKE=
+github.com/prometheus/common v0.48.0/go.mod h1:0/KsvlIEfPQCQ5I2iNSAWKPZziNCvRs5EC6ILDTlAPc=
 github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k6Bo=
 github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
 google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/exporters/stdout/stdoutmetric/config.go b/exporters/stdout/stdoutmetric/config.go
index cac5afeeb67..cb14210748a 100644
--- a/exporters/stdout/stdoutmetric/config.go
+++ b/exporters/stdout/stdoutmetric/config.go
@@ -1,15 +1,5 @@
 // Copyright The OpenTelemetry Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdoutmetric // import "go.opentelemetry.io/otel/exporters/stdout/stdoutmetric"
 
diff --git a/exporters/stdout/stdoutmetric/doc.go b/exporters/stdout/stdoutmetric/doc.go
index fc766ad0bea..c0388034bc1 100644
--- a/exporters/stdout/stdoutmetric/doc.go
+++ b/exporters/stdout/stdoutmetric/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package stdoutmetric provides an exporter for OpenTelemetry metric
 // telemetry.
diff --git a/exporters/stdout/stdoutmetric/encoder.go b/exporters/stdout/stdoutmetric/encoder.go
index 28439d74c38..e6ada7b0d72 100644
--- a/exporters/stdout/stdoutmetric/encoder.go
+++ b/exporters/stdout/stdoutmetric/encoder.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdoutmetric // import "go.opentelemetry.io/otel/exporters/stdout/stdoutmetric"
 
diff --git a/exporters/stdout/stdoutmetric/example_test.go b/exporters/stdout/stdoutmetric/example_test.go
index 3086c064d01..10dae5043b4 100644
--- a/exporters/stdout/stdoutmetric/example_test.go
+++ b/exporters/stdout/stdoutmetric/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdoutmetric_test
 
diff --git a/exporters/stdout/stdoutmetric/exporter.go b/exporters/stdout/stdoutmetric/exporter.go
index faedf9a9100..96006ab29dc 100644
--- a/exporters/stdout/stdoutmetric/exporter.go
+++ b/exporters/stdout/stdoutmetric/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdoutmetric // import "go.opentelemetry.io/otel/exporters/stdout/stdoutmetric"
 
diff --git a/exporters/stdout/stdoutmetric/exporter_test.go b/exporters/stdout/stdoutmetric/exporter_test.go
index 2dbfe6357a2..a8c96046da6 100644
--- a/exporters/stdout/stdoutmetric/exporter_test.go
+++ b/exporters/stdout/stdoutmetric/exporter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdoutmetric_test // import "go.opentelemetry.io/otel/exporters/stdout/stdoutmetric"
 
diff --git a/exporters/stdout/stdoutmetric/go.mod b/exporters/stdout/stdoutmetric/go.mod
index 6cc37bd4290..bd111a6423e 100644
--- a/exporters/stdout/stdoutmetric/go.mod
+++ b/exporters/stdout/stdoutmetric/go.mod
@@ -1,9 +1,9 @@
 module go.opentelemetry.io/otel/exporters/stdout/stdoutmetric
 
-go 1.20
+go 1.21
 
 require (
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/sdk/metric v1.24.0
diff --git a/exporters/stdout/stdoutmetric/go.sum b/exporters/stdout/stdoutmetric/go.sum
index 30f0aa10ffa..08b2c141d1c 100644
--- a/exporters/stdout/stdoutmetric/go.sum
+++ b/exporters/stdout/stdoutmetric/go.sum
@@ -6,10 +6,11 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
diff --git a/exporters/stdout/stdouttrace/config.go b/exporters/stdout/stdouttrace/config.go
index 2d765435495..3f60e3ef089 100644
--- a/exporters/stdout/stdouttrace/config.go
+++ b/exporters/stdout/stdouttrace/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
 
diff --git a/exporters/stdout/stdouttrace/doc.go b/exporters/stdout/stdouttrace/doc.go
index 8da3268c7c7..eff7730cdc9 100644
--- a/exporters/stdout/stdouttrace/doc.go
+++ b/exporters/stdout/stdouttrace/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package stdouttrace contains an OpenTelemetry exporter for tracing
 // telemetry to be written to an output destination as JSON.
diff --git a/exporters/stdout/stdouttrace/example_test.go b/exporters/stdout/stdouttrace/example_test.go
index e769aad58ab..42f7e062ce5 100644
--- a/exporters/stdout/stdouttrace/example_test.go
+++ b/exporters/stdout/stdouttrace/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdouttrace_test
 
diff --git a/exporters/stdout/stdouttrace/go.mod b/exporters/stdout/stdouttrace/go.mod
index e374bb63b63..c24f4f3c7ca 100644
--- a/exporters/stdout/stdouttrace/go.mod
+++ b/exporters/stdout/stdouttrace/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/exporters/stdout/stdouttrace
 
-go 1.20
+go 1.21
 
 replace (
 	go.opentelemetry.io/otel => ../../..
@@ -8,7 +8,7 @@ replace (
 )
 
 require (
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
diff --git a/exporters/stdout/stdouttrace/go.sum b/exporters/stdout/stdouttrace/go.sum
index 30f0aa10ffa..08b2c141d1c 100644
--- a/exporters/stdout/stdouttrace/go.sum
+++ b/exporters/stdout/stdouttrace/go.sum
@@ -6,10 +6,11 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
diff --git a/exporters/stdout/stdouttrace/trace.go b/exporters/stdout/stdouttrace/trace.go
index 4998d777449..dcbd04dd62f 100644
--- a/exporters/stdout/stdouttrace/trace.go
+++ b/exporters/stdout/stdouttrace/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
 
diff --git a/exporters/stdout/stdouttrace/trace_test.go b/exporters/stdout/stdouttrace/trace_test.go
index 649312bf697..d308b13ed5e 100644
--- a/exporters/stdout/stdouttrace/trace_test.go
+++ b/exporters/stdout/stdouttrace/trace_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package stdouttrace_test
 
diff --git a/exporters/zipkin/doc.go b/exporters/zipkin/doc.go
index 5ff392c2cb3..16bf43844b6 100644
--- a/exporters/zipkin/doc.go
+++ b/exporters/zipkin/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package zipkin contains an OpenTelemetry tracing exporter for Zipkin.
 package zipkin // import "go.opentelemetry.io/otel/exporters/zipkin"
diff --git a/exporters/zipkin/env.go b/exporters/zipkin/env.go
index f1afd8e8665..9e91180a046 100644
--- a/exporters/zipkin/env.go
+++ b/exporters/zipkin/env.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package zipkin // import "go.opentelemetry.io/otel/exporters/zipkin"
 
diff --git a/exporters/zipkin/env_test.go b/exporters/zipkin/env_test.go
index 0ac9d5a9d0d..aea2a01eb35 100644
--- a/exporters/zipkin/env_test.go
+++ b/exporters/zipkin/env_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package zipkin
 
diff --git a/exporters/zipkin/go.mod b/exporters/zipkin/go.mod
index 00e68621b90..aa0d4f1b4aa 100644
--- a/exporters/zipkin/go.mod
+++ b/exporters/zipkin/go.mod
@@ -1,13 +1,13 @@
 module go.opentelemetry.io/otel/exporters/zipkin
 
-go 1.20
+go 1.21
 
 require (
 	github.com/go-logr/logr v1.4.1
 	github.com/go-logr/stdr v1.2.2
 	github.com/google/go-cmp v0.6.0
 	github.com/openzipkin/zipkin-go v0.4.2
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
diff --git a/exporters/zipkin/go.sum b/exporters/zipkin/go.sum
index 52d6ac18655..24c8c47dddc 100644
--- a/exporters/zipkin/go.sum
+++ b/exporters/zipkin/go.sum
@@ -11,8 +11,8 @@ github.com/openzipkin/zipkin-go v0.4.2 h1:zjqfqHjUpPmB3c1GlCvvgsM1G4LkvqQbBDueDO
 github.com/openzipkin/zipkin-go v0.4.2/go.mod h1:ZeVkFjuuBiSy13y8vpSDCjMi9GoI3hPpCJSBx/EYFhY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
diff --git a/exporters/zipkin/internal/gen.go b/exporters/zipkin/internal/gen.go
index c686454cee4..785f8f5bbec 100644
--- a/exporters/zipkin/internal/gen.go
+++ b/exporters/zipkin/internal/gen.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/exporters/zipkin/internal"
 
diff --git a/exporters/zipkin/internal/internaltest/alignment.go b/exporters/zipkin/internal/internaltest/alignment.go
index 14bf46c37a1..b307e7e453a 100644
--- a/exporters/zipkin/internal/internaltest/alignment.go
+++ b/exporters/zipkin/internal/internaltest/alignment.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/alignment.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/exporters/zipkin/internal/internaltest"
 
diff --git a/exporters/zipkin/internal/internaltest/env.go b/exporters/zipkin/internal/internaltest/env.go
index e13a1fc6593..f3bb074c506 100644
--- a/exporters/zipkin/internal/internaltest/env.go
+++ b/exporters/zipkin/internal/internaltest/env.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/env.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/exporters/zipkin/internal/internaltest"
 
diff --git a/exporters/zipkin/internal/internaltest/env_test.go b/exporters/zipkin/internal/internaltest/env_test.go
index dc4dcea8e30..3fe33f92821 100644
--- a/exporters/zipkin/internal/internaltest/env_test.go
+++ b/exporters/zipkin/internal/internaltest/env_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/env_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/exporters/zipkin/internal/internaltest/errors.go b/exporters/zipkin/internal/internaltest/errors.go
index 11641c82c70..0d6063eab92 100644
--- a/exporters/zipkin/internal/internaltest/errors.go
+++ b/exporters/zipkin/internal/internaltest/errors.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/errors.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/exporters/zipkin/internal/internaltest"
 
diff --git a/exporters/zipkin/internal/internaltest/harness.go b/exporters/zipkin/internal/internaltest/harness.go
index 53e8b3bf113..5f335d69351 100644
--- a/exporters/zipkin/internal/internaltest/harness.go
+++ b/exporters/zipkin/internal/internaltest/harness.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/harness.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/exporters/zipkin/internal/internaltest"
 
diff --git a/exporters/zipkin/internal/internaltest/text_map_carrier.go b/exporters/zipkin/internal/internaltest/text_map_carrier.go
index ac70986fffa..3ce209874a3 100644
--- a/exporters/zipkin/internal/internaltest/text_map_carrier.go
+++ b/exporters/zipkin/internal/internaltest/text_map_carrier.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_carrier.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/exporters/zipkin/internal/internaltest"
 
diff --git a/exporters/zipkin/internal/internaltest/text_map_carrier_test.go b/exporters/zipkin/internal/internaltest/text_map_carrier_test.go
index 086c8af26ea..1128221afad 100644
--- a/exporters/zipkin/internal/internaltest/text_map_carrier_test.go
+++ b/exporters/zipkin/internal/internaltest/text_map_carrier_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_carrier_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/exporters/zipkin/internal/internaltest/text_map_propagator.go b/exporters/zipkin/internal/internaltest/text_map_propagator.go
index f22e7ffaa3c..e9e164844e0 100644
--- a/exporters/zipkin/internal/internaltest/text_map_propagator.go
+++ b/exporters/zipkin/internal/internaltest/text_map_propagator.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_propagator.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/exporters/zipkin/internal/internaltest"
 
diff --git a/exporters/zipkin/internal/internaltest/text_map_propagator_test.go b/exporters/zipkin/internal/internaltest/text_map_propagator_test.go
index babcc95fc1b..eda9dbe55c7 100644
--- a/exporters/zipkin/internal/internaltest/text_map_propagator_test.go
+++ b/exporters/zipkin/internal/internaltest/text_map_propagator_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_propagator_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/exporters/zipkin/internal/matchers/expectation.go b/exporters/zipkin/internal/matchers/expectation.go
index f890ca92790..94ebffcdbaf 100644
--- a/exporters/zipkin/internal/matchers/expectation.go
+++ b/exporters/zipkin/internal/matchers/expectation.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/expectation.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/exporters/zipkin/internal/matchers"
 
diff --git a/exporters/zipkin/internal/matchers/expecter.go b/exporters/zipkin/internal/matchers/expecter.go
index e29b15c7914..d9324cb6b16 100644
--- a/exporters/zipkin/internal/matchers/expecter.go
+++ b/exporters/zipkin/internal/matchers/expecter.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/expecter.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/exporters/zipkin/internal/matchers"
 
diff --git a/exporters/zipkin/internal/matchers/temporal_matcher.go b/exporters/zipkin/internal/matchers/temporal_matcher.go
index dbd2690b4d6..8e9ec209f2d 100644
--- a/exporters/zipkin/internal/matchers/temporal_matcher.go
+++ b/exporters/zipkin/internal/matchers/temporal_matcher.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/temporal_matcher.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/exporters/zipkin/internal/matchers"
 
diff --git a/exporters/zipkin/model.go b/exporters/zipkin/model.go
index 50c163b8346..059ad7e38c3 100644
--- a/exporters/zipkin/model.go
+++ b/exporters/zipkin/model.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package zipkin // import "go.opentelemetry.io/otel/exporters/zipkin"
 
diff --git a/exporters/zipkin/model_test.go b/exporters/zipkin/model_test.go
index 957b521b537..117267b1bf2 100644
--- a/exporters/zipkin/model_test.go
+++ b/exporters/zipkin/model_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package zipkin
 
diff --git a/exporters/zipkin/zipkin.go b/exporters/zipkin/zipkin.go
index 2708e4612e5..1b07c8c2548 100644
--- a/exporters/zipkin/zipkin.go
+++ b/exporters/zipkin/zipkin.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package zipkin // import "go.opentelemetry.io/otel/exporters/zipkin"
 
diff --git a/exporters/zipkin/zipkin_test.go b/exporters/zipkin/zipkin_test.go
index deb3eafca15..431b1277811 100644
--- a/exporters/zipkin/zipkin_test.go
+++ b/exporters/zipkin/zipkin_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package zipkin
 
diff --git a/get_main_pkgs.sh b/get_main_pkgs.sh
index 9a58fb1d372..93e80ea306c 100755
--- a/get_main_pkgs.sh
+++ b/get_main_pkgs.sh
@@ -1,18 +1,7 @@
 #!/usr/bin/env bash
 
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 set -euo pipefail
 
diff --git a/go.mod b/go.mod
index 7180f343a69..cde7aa8d1b3 100644
--- a/go.mod
+++ b/go.mod
@@ -1,12 +1,12 @@
 module go.opentelemetry.io/otel
 
-go 1.20
+go 1.21
 
 require (
 	github.com/go-logr/logr v1.4.1
 	github.com/go-logr/stdr v1.2.2
 	github.com/google/go-cmp v0.6.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel/metric v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
 )
diff --git a/go.sum b/go.sum
index 10051f76c68..e91d3265de8 100644
--- a/go.sum
+++ b/go.sum
@@ -9,8 +9,8 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/handler.go b/handler.go
index 4115fe3bbb5..f63fbdfc13a 100644
--- a/handler.go
+++ b/handler.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel // import "go.opentelemetry.io/otel"
 
diff --git a/handler_test.go b/handler_test.go
index c522d61e661..4bf8283c358 100644
--- a/handler_test.go
+++ b/handler_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel
 
diff --git a/internal/attribute/attribute.go b/internal/attribute/attribute.go
index 622c3ee3f27..f32766e57f6 100644
--- a/internal/attribute/attribute.go
+++ b/internal/attribute/attribute.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package attribute provide several helper functions for some commonly used
diff --git a/internal/attribute/attribute_test.go b/internal/attribute/attribute_test.go
index 05f4a0a5397..7202700cac1 100644
--- a/internal/attribute/attribute_test.go
+++ b/internal/attribute/attribute_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package attribute
 
diff --git a/internal/baggage/baggage.go b/internal/baggage/baggage.go
index b96e5408e69..b4f85f44a93 100644
--- a/internal/baggage/baggage.go
+++ b/internal/baggage/baggage.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package baggage provides base types and functionality to store and retrieve
diff --git a/internal/baggage/context.go b/internal/baggage/context.go
index 4469700d9cb..3aea9c491f0 100644
--- a/internal/baggage/context.go
+++ b/internal/baggage/context.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package baggage // import "go.opentelemetry.io/otel/internal/baggage"
 
diff --git a/internal/baggage/context_test.go b/internal/baggage/context_test.go
index ba98211232c..7074f4b49a4 100644
--- a/internal/baggage/context_test.go
+++ b/internal/baggage/context_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package baggage
 
diff --git a/internal/gen.go b/internal/gen.go
index f532f07e9e5..4259f0320d4 100644
--- a/internal/gen.go
+++ b/internal/gen.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/internal"
 
diff --git a/internal/global/benchmark_test.go b/internal/global/benchmark_test.go
index 5d4d3b9cf8b..5b938b496c6 100644
--- a/internal/global/benchmark_test.go
+++ b/internal/global/benchmark_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global
 
diff --git a/internal/global/handler.go b/internal/global/handler.go
index 5e9b8304792..423ee4f8f86 100644
--- a/internal/global/handler.go
+++ b/internal/global/handler.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
diff --git a/internal/global/handler_test.go b/internal/global/handler_test.go
index 6ddae2f4cce..db2c1e6e0b0 100644
--- a/internal/global/handler_test.go
+++ b/internal/global/handler_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global
 
diff --git a/internal/global/instruments.go b/internal/global/instruments.go
index ebb13c20678..0c8ed20a596 100644
--- a/internal/global/instruments.go
+++ b/internal/global/instruments.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
diff --git a/internal/global/instruments_test.go b/internal/global/instruments_test.go
index 7808f77da30..4e7241f8442 100644
--- a/internal/global/instruments_test.go
+++ b/internal/global/instruments_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global
 
diff --git a/internal/global/internal_logging.go b/internal/global/internal_logging.go
index c6f305a2b76..adbca7d3477 100644
--- a/internal/global/internal_logging.go
+++ b/internal/global/internal_logging.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
@@ -23,17 +12,20 @@ import (
 	"github.com/go-logr/stdr"
 )
 
-// globalLogger is the logging interface used within the otel api and sdk provide details of the internals.
+// globalLogger holds a reference to the [logr.Logger] used within
+// go.opentelemetry.io/otel.
 //
 // The default logger uses stdr which is backed by the standard `log.Logger`
 // interface. This logger will only show messages at the Error Level.
-var globalLogger atomic.Pointer[logr.Logger]
+var globalLogger = func() *atomic.Pointer[logr.Logger] {
+	l := stdr.New(log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile))
 
-func init() {
-	SetLogger(stdr.New(log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile)))
-}
+	p := new(atomic.Pointer[logr.Logger])
+	p.Store(&l)
+	return p
+}()
 
-// SetLogger overrides the globalLogger with l.
+// SetLogger sets the global Logger to l.
 //
 // To see Warn messages use a logger with `l.V(1).Enabled() == true`
 // To see Info messages use a logger with `l.V(4).Enabled() == true`
@@ -42,28 +34,29 @@ func SetLogger(l logr.Logger) {
 	globalLogger.Store(&l)
 }
 
-func getLogger() logr.Logger {
+// GetLogger returns the global logger.
+func GetLogger() logr.Logger {
 	return *globalLogger.Load()
 }
 
 // Info prints messages about the general state of the API or SDK.
 // This should usually be less than 5 messages a minute.
 func Info(msg string, keysAndValues ...interface{}) {
-	getLogger().V(4).Info(msg, keysAndValues...)
+	GetLogger().V(4).Info(msg, keysAndValues...)
 }
 
 // Error prints messages about exceptional states of the API or SDK.
 func Error(err error, msg string, keysAndValues ...interface{}) {
-	getLogger().Error(err, msg, keysAndValues...)
+	GetLogger().Error(err, msg, keysAndValues...)
 }
 
 // Debug prints messages about all internal changes in the API or SDK.
 func Debug(msg string, keysAndValues ...interface{}) {
-	getLogger().V(8).Info(msg, keysAndValues...)
+	GetLogger().V(8).Info(msg, keysAndValues...)
 }
 
 // Warn prints messages about warnings in the API or SDK.
 // Not an error but is likely more important than an informational event.
 func Warn(msg string, keysAndValues ...interface{}) {
-	getLogger().V(1).Info(msg, keysAndValues...)
+	GetLogger().V(1).Info(msg, keysAndValues...)
 }
diff --git a/internal/global/internal_logging_test.go b/internal/global/internal_logging_test.go
index b51333b4dd5..2b55050c8bc 100644
--- a/internal/global/internal_logging_test.go
+++ b/internal/global/internal_logging_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global
 
diff --git a/internal/global/meter.go b/internal/global/meter.go
index 7ed61c0e256..f21898591e5 100644
--- a/internal/global/meter.go
+++ b/internal/global/meter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
diff --git a/internal/global/meter_test.go b/internal/global/meter_test.go
index 4d05c82961a..630112c1236 100644
--- a/internal/global/meter_test.go
+++ b/internal/global/meter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
diff --git a/internal/global/meter_types_test.go b/internal/global/meter_types_test.go
index 9929e12353d..ae4cb9e1619 100644
--- a/internal/global/meter_types_test.go
+++ b/internal/global/meter_types_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
diff --git a/internal/global/propagator.go b/internal/global/propagator.go
index 06bac35c2fe..38560ff9915 100644
--- a/internal/global/propagator.go
+++ b/internal/global/propagator.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
diff --git a/internal/global/propagator_test.go b/internal/global/propagator_test.go
index d13be35c715..8f49bc5b500 100644
--- a/internal/global/propagator_test.go
+++ b/internal/global/propagator_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global
 
diff --git a/internal/global/state.go b/internal/global/state.go
index 386c8bfdc08..976fa610387 100644
--- a/internal/global/state.go
+++ b/internal/global/state.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
diff --git a/internal/global/state_test.go b/internal/global/state_test.go
index 5a049edfeed..f54ba7ef09b 100644
--- a/internal/global/state_test.go
+++ b/internal/global/state_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global
 
diff --git a/internal/global/trace.go b/internal/global/trace.go
index 3f61ec12a34..2e765c6d07e 100644
--- a/internal/global/trace.go
+++ b/internal/global/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global // import "go.opentelemetry.io/otel/internal/global"
 
diff --git a/internal/global/trace_test.go b/internal/global/trace_test.go
index d9807493854..cc0fd73b526 100644
--- a/internal/global/trace_test.go
+++ b/internal/global/trace_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global
 
diff --git a/internal/global/util_test.go b/internal/global/util_test.go
index bc88508184c..0e0659c0ac3 100644
--- a/internal/global/util_test.go
+++ b/internal/global/util_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package global
 
diff --git a/internal/internaltest/alignment.go b/internal/internaltest/alignment.go
index 165fc443aff..cf0bfbbdc12 100644
--- a/internal/internaltest/alignment.go
+++ b/internal/internaltest/alignment.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/alignment.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/internal/internaltest"
 
diff --git a/internal/internaltest/env.go b/internal/internaltest/env.go
index d30eeb123c7..58d415994b7 100644
--- a/internal/internaltest/env.go
+++ b/internal/internaltest/env.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/env.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/internal/internaltest"
 
diff --git a/internal/internaltest/env_test.go b/internal/internaltest/env_test.go
index dc4dcea8e30..3fe33f92821 100644
--- a/internal/internaltest/env_test.go
+++ b/internal/internaltest/env_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/env_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/internaltest/errors.go b/internal/internaltest/errors.go
index 30ea672e440..ff28fafb24f 100644
--- a/internal/internaltest/errors.go
+++ b/internal/internaltest/errors.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/errors.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/internal/internaltest"
 
diff --git a/internal/internaltest/harness.go b/internal/internaltest/harness.go
index ce8e2035f38..c2e4a795804 100644
--- a/internal/internaltest/harness.go
+++ b/internal/internaltest/harness.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/harness.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/internal/internaltest"
 
diff --git a/internal/internaltest/text_map_carrier.go b/internal/internaltest/text_map_carrier.go
index 9ca585df7ef..4648a12a6c8 100644
--- a/internal/internaltest/text_map_carrier.go
+++ b/internal/internaltest/text_map_carrier.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_carrier.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/internal/internaltest"
 
diff --git a/internal/internaltest/text_map_carrier_test.go b/internal/internaltest/text_map_carrier_test.go
index 086c8af26ea..1128221afad 100644
--- a/internal/internaltest/text_map_carrier_test.go
+++ b/internal/internaltest/text_map_carrier_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_carrier_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/internaltest/text_map_propagator.go b/internal/internaltest/text_map_propagator.go
index 6c7bc464d9f..17bd53f3386 100644
--- a/internal/internaltest/text_map_propagator.go
+++ b/internal/internaltest/text_map_propagator.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_propagator.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/internal/internaltest"
 
diff --git a/internal/internaltest/text_map_propagator_test.go b/internal/internaltest/text_map_propagator_test.go
index babcc95fc1b..eda9dbe55c7 100644
--- a/internal/internaltest/text_map_propagator_test.go
+++ b/internal/internaltest/text_map_propagator_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_propagator_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/matchers/expectation.go b/internal/matchers/expectation.go
index f54f63afbb3..90b29bd1bc6 100644
--- a/internal/matchers/expectation.go
+++ b/internal/matchers/expectation.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/expectation.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/internal/matchers"
 
diff --git a/internal/matchers/expecter.go b/internal/matchers/expecter.go
index fc2ac0fb37e..c79a233394d 100644
--- a/internal/matchers/expecter.go
+++ b/internal/matchers/expecter.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/expecter.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/internal/matchers"
 
diff --git a/internal/matchers/package.go b/internal/matchers/package.go
index 4868fedef7c..812ce97041a 100644
--- a/internal/matchers/package.go
+++ b/internal/matchers/package.go
@@ -1,15 +1,4 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/internal/matchers"
diff --git a/internal/matchers/temporal_matcher.go b/internal/matchers/temporal_matcher.go
index 7e647a56722..0ca79d7dd1a 100644
--- a/internal/matchers/temporal_matcher.go
+++ b/internal/matchers/temporal_matcher.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/temporal_matcher.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/internal/matchers"
 
diff --git a/internal/rawhelpers.go b/internal/rawhelpers.go
index e07e7940004..3e7bb3b3566 100644
--- a/internal/rawhelpers.go
+++ b/internal/rawhelpers.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/internal"
 
diff --git a/internal/shared/internaltest/alignment.go.tmpl b/internal/shared/internaltest/alignment.go.tmpl
index 9ce5d2d14e3..1dd0960729e 100644
--- a/internal/shared/internaltest/alignment.go.tmpl
+++ b/internal/shared/internaltest/alignment.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/alignment.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/internaltest/env.go.tmpl b/internal/shared/internaltest/env.go.tmpl
index e4583451b7d..151ce12ec3f 100644
--- a/internal/shared/internaltest/env.go.tmpl
+++ b/internal/shared/internaltest/env.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/env.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/internaltest/env_test.go.tmpl b/internal/shared/internaltest/env_test.go.tmpl
index dc4dcea8e30..3fe33f92821 100644
--- a/internal/shared/internaltest/env_test.go.tmpl
+++ b/internal/shared/internaltest/env_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/env_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/internaltest/errors.go.tmpl b/internal/shared/internaltest/errors.go.tmpl
index bfaf86d51ea..f41fd542895 100644
--- a/internal/shared/internaltest/errors.go.tmpl
+++ b/internal/shared/internaltest/errors.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/errors.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/internaltest/harness.go.tmpl b/internal/shared/internaltest/harness.go.tmpl
index 7223b9d2196..36db35476b4 100644
--- a/internal/shared/internaltest/harness.go.tmpl
+++ b/internal/shared/internaltest/harness.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/harness.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/internaltest/text_map_carrier.go.tmpl b/internal/shared/internaltest/text_map_carrier.go.tmpl
index f80d4e2c767..2261c37a7c0 100644
--- a/internal/shared/internaltest/text_map_carrier.go.tmpl
+++ b/internal/shared/internaltest/text_map_carrier.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_carrier.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/internaltest/text_map_carrier_test.go.tmpl b/internal/shared/internaltest/text_map_carrier_test.go.tmpl
index 086c8af26ea..1128221afad 100644
--- a/internal/shared/internaltest/text_map_carrier_test.go.tmpl
+++ b/internal/shared/internaltest/text_map_carrier_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_carrier_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/internaltest/text_map_propagator.go.tmpl b/internal/shared/internaltest/text_map_propagator.go.tmpl
index 0c3a33cb1d7..3ef2745dba9 100644
--- a/internal/shared/internaltest/text_map_propagator.go.tmpl
+++ b/internal/shared/internaltest/text_map_propagator.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_propagator.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/internaltest/text_map_propagator_test.go.tmpl b/internal/shared/internaltest/text_map_propagator_test.go.tmpl
index babcc95fc1b..eda9dbe55c7 100644
--- a/internal/shared/internaltest/text_map_propagator_test.go.tmpl
+++ b/internal/shared/internaltest/text_map_propagator_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_propagator_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/internal/shared/matchers/expectation.go.tmpl b/internal/shared/matchers/expectation.go.tmpl
index 4002fec51f1..2d5b4c925b3 100644
--- a/internal/shared/matchers/expectation.go.tmpl
+++ b/internal/shared/matchers/expectation.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/expectation.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers
 
diff --git a/internal/shared/matchers/expecter.go.tmpl b/internal/shared/matchers/expecter.go.tmpl
index be06071e4bd..f254b430334 100644
--- a/internal/shared/matchers/expecter.go.tmpl
+++ b/internal/shared/matchers/expecter.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/expecter.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers
 
diff --git a/internal/shared/matchers/temporal_matcher.go.tmpl b/internal/shared/matchers/temporal_matcher.go.tmpl
index 270a3d84f99..6bb7f57f18e 100644
--- a/internal/shared/matchers/temporal_matcher.go.tmpl
+++ b/internal/shared/matchers/temporal_matcher.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/temporal_matcher.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers
 
diff --git a/internal/shared/otlp/envconfig/envconfig.go.tmpl b/internal/shared/otlp/envconfig/envconfig.go.tmpl
index b516e9ca2c3..6e0110b3344 100644
--- a/internal/shared/otlp/envconfig/envconfig.go.tmpl
+++ b/internal/shared/otlp/envconfig/envconfig.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig
 
diff --git a/internal/shared/otlp/envconfig/envconfig_test.go.tmpl b/internal/shared/otlp/envconfig/envconfig_test.go.tmpl
index 6cbe0c7ab11..14543ea11eb 100644
--- a/internal/shared/otlp/envconfig/envconfig_test.go.tmpl
+++ b/internal/shared/otlp/envconfig/envconfig_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/envconfig/envconfig_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package envconfig
 
diff --git a/internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl b/internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl
index a76a4835ddb..5334c9b3911 100644
--- a/internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/internal/shared/otlp/otlpmetric/oconf/envconfig_test.go.tmpl b/internal/shared/otlp/otlpmetric/oconf/envconfig_test.go.tmpl
index b3f9f9c3714..5c621d7b47e 100644
--- a/internal/shared/otlp/otlpmetric/oconf/envconfig_test.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/oconf/envconfig_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/envconfig_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/internal/shared/otlp/otlpmetric/oconf/options.go.tmpl b/internal/shared/otlp/otlpmetric/oconf/options.go.tmpl
index 5e9f075b1bd..071a144fdf5 100644
--- a/internal/shared/otlp/otlpmetric/oconf/options.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/oconf/options.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/options.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl b/internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl
index ea80af285d6..f266628e2ae 100644
--- a/internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl b/internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl
index 6ec4125228e..1a2cba6c424 100644
--- a/internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl b/internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl
index 6adcb4f3b53..c674f87134b 100644
--- a/internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package oconf
 
diff --git a/internal/shared/otlp/otlpmetric/otest/client.go.tmpl b/internal/shared/otlp/otlpmetric/otest/client.go.tmpl
index cefc910c4c5..95af8bbff1b 100644
--- a/internal/shared/otlp/otlpmetric/otest/client.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/otest/client.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/client.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest
 
diff --git a/internal/shared/otlp/otlpmetric/otest/client_test.go.tmpl b/internal/shared/otlp/otlpmetric/otest/client_test.go.tmpl
index b7cfa019fb5..79ead4d91f2 100644
--- a/internal/shared/otlp/otlpmetric/otest/client_test.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/otest/client_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/client_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest
 
diff --git a/internal/shared/otlp/otlpmetric/otest/collector.go.tmpl b/internal/shared/otlp/otlpmetric/otest/collector.go.tmpl
index fba237e68fc..22ffd923790 100644
--- a/internal/shared/otlp/otlpmetric/otest/collector.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/otest/collector.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/otest/collector.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otest
 
diff --git a/internal/shared/otlp/otlpmetric/transform/attribute.go.tmpl b/internal/shared/otlp/otlpmetric/transform/attribute.go.tmpl
index 60a23a6ed78..63cd40dda7a 100644
--- a/internal/shared/otlp/otlpmetric/transform/attribute.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/transform/attribute.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/attribute.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/internal/shared/otlp/otlpmetric/transform/attribute_test.go.tmpl b/internal/shared/otlp/otlpmetric/transform/attribute_test.go.tmpl
index 57db7ab797b..0815ba988d2 100644
--- a/internal/shared/otlp/otlpmetric/transform/attribute_test.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/transform/attribute_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/attribute_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/internal/shared/otlp/otlpmetric/transform/error.go.tmpl b/internal/shared/otlp/otlpmetric/transform/error.go.tmpl
index 5f9476af6f8..69f0dd5d76c 100644
--- a/internal/shared/otlp/otlpmetric/transform/error.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/transform/error.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/error.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl b/internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl
index 03e16ef8f14..be53e29e66e 100644
--- a/internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/internal/shared/otlp/otlpmetric/transform/metricdata.go.tmpl b/internal/shared/otlp/otlpmetric/transform/metricdata.go.tmpl
index 35344b46b73..01b259764cb 100644
--- a/internal/shared/otlp/otlpmetric/transform/metricdata.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/transform/metricdata.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/metricdata.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package transform provides transformation functionality from the
 // sdk/metric/metricdata data-types into OTLP data-types.
diff --git a/internal/shared/otlp/otlpmetric/transform/metricdata_test.go.tmpl b/internal/shared/otlp/otlpmetric/transform/metricdata_test.go.tmpl
index 2ce09fe6c29..d2770158d05 100644
--- a/internal/shared/otlp/otlpmetric/transform/metricdata_test.go.tmpl
+++ b/internal/shared/otlp/otlpmetric/transform/metricdata_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlpmetric/transform/metricdata_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package transform
 
diff --git a/internal/shared/otlp/otlptrace/header.go.tmpl b/internal/shared/otlp/otlptrace/header.go.tmpl
index c8ad7a00efb..cbb1340c092 100644
--- a/internal/shared/otlp/otlptrace/header.go.tmpl
+++ b/internal/shared/otlp/otlptrace/header.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/header.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/internal/shared/otlp/otlptrace/header_test.go.tmpl b/internal/shared/otlp/otlptrace/header_test.go.tmpl
index 4c80b9c28f8..ea61dbfd3c7 100644
--- a/internal/shared/otlp/otlptrace/header_test.go.tmpl
+++ b/internal/shared/otlp/otlptrace/header_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/header_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl b/internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl
index 6b9e1b27e49..f1fa3dc8450 100644
--- a/internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig
 
diff --git a/internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl b/internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl
index f138acf156d..0a64afe3ce6 100644
--- a/internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig
 
diff --git a/internal/shared/otlp/otlptrace/otlpconfig/options_test.go.tmpl b/internal/shared/otlp/otlptrace/otlpconfig/options_test.go.tmpl
index c750149ccaa..2a25c103e4d 100644
--- a/internal/shared/otlp/otlptrace/otlpconfig/options_test.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlpconfig/options_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/options_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig
 
diff --git a/internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl b/internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl
index 6edfa85e181..ef64ea4c682 100644
--- a/internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig
 
diff --git a/internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl b/internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl
index 767ae5d52d4..59cf0326a62 100644
--- a/internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlpconfig
 
diff --git a/internal/shared/otlp/otlptrace/otlptracetest/client.go.tmpl b/internal/shared/otlp/otlptrace/otlptracetest/client.go.tmpl
index 598d594069b..6be0e77e7b5 100644
--- a/internal/shared/otlp/otlptrace/otlptracetest/client.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlptracetest/client.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/client.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest
 
diff --git a/internal/shared/otlp/otlptrace/otlptracetest/collector.go.tmpl b/internal/shared/otlp/otlptrace/otlptracetest/collector.go.tmpl
index f5075d4f287..07cd70de622 100644
--- a/internal/shared/otlp/otlptrace/otlptracetest/collector.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlptracetest/collector.go.tmpl
@@ -2,23 +2,13 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/collector.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest
 
 import (
-	"sort"
+	"cmp"
+	"slices"
 
 	collectortracepb "go.opentelemetry.io/proto/otlp/collector/trace/v1"
 	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
@@ -99,8 +89,8 @@ func resourceString(res *resourcepb.Resource) string {
 }
 
 func sortedAttributes(attrs []*commonpb.KeyValue) []*commonpb.KeyValue {
-	sort.Slice(attrs[:], func(i, j int) bool {
-		return attrs[i].Key < attrs[j].Key
+	slices.SortFunc(attrs, func(a, b *commonpb.KeyValue) int {
+		return cmp.Compare(a.Key, b.Key)
 	})
 	return attrs
 }
diff --git a/internal/shared/otlp/otlptrace/otlptracetest/data.go.tmpl b/internal/shared/otlp/otlptrace/otlptracetest/data.go.tmpl
index bbdfe2e71b2..f9b020b71cc 100644
--- a/internal/shared/otlp/otlptrace/otlptracetest/data.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlptracetest/data.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/data.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest
 
diff --git a/internal/shared/otlp/otlptrace/otlptracetest/otlptest.go.tmpl b/internal/shared/otlp/otlptrace/otlptracetest/otlptest.go.tmpl
index 00e6ff9569b..1eec6efaedc 100644
--- a/internal/shared/otlp/otlptrace/otlptracetest/otlptest.go.tmpl
+++ b/internal/shared/otlp/otlptrace/otlptracetest/otlptest.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/otlptrace/otlptracetest/otlptest.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otlptracetest
 
diff --git a/internal/shared/otlp/partialsuccess.go.tmpl b/internal/shared/otlp/partialsuccess.go.tmpl
index b556540a691..a28d6d9d169 100644
--- a/internal/shared/otlp/partialsuccess.go.tmpl
+++ b/internal/shared/otlp/partialsuccess.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/internal/shared/otlp/partialsuccess_test.go.tmpl b/internal/shared/otlp/partialsuccess_test.go.tmpl
index c385c4d428e..740e2a468e4 100644
--- a/internal/shared/otlp/partialsuccess_test.go.tmpl
+++ b/internal/shared/otlp/partialsuccess_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/partialsuccess_test.go
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/internal/shared/otlp/retry/retry.go.tmpl b/internal/shared/otlp/retry/retry.go.tmpl
index 7618ef30102..02d3c2147c1 100644
--- a/internal/shared/otlp/retry/retry.go.tmpl
+++ b/internal/shared/otlp/retry/retry.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package retry provides request retry functionality that can perform
 // configurable exponential backoff for transient errors and honor any
diff --git a/internal/shared/otlp/retry/retry_test.go.tmpl b/internal/shared/otlp/retry/retry_test.go.tmpl
index 9279c7c00ff..b48dde62359 100644
--- a/internal/shared/otlp/retry/retry_test.go.tmpl
+++ b/internal/shared/otlp/retry/retry_test.go.tmpl
@@ -2,18 +2,7 @@
 // source: internal/shared/otlp/retry/retry_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package retry
 
diff --git a/internal/tools/go.mod b/internal/tools/go.mod
index 5d3744be9c1..27622cdd224 100644
--- a/internal/tools/go.mod
+++ b/internal/tools/go.mod
@@ -1,6 +1,6 @@
 module go.opentelemetry.io/otel/internal/tools
 
-go 1.20
+go 1.21
 
 require (
 	github.com/client9/misspell v0.3.4
@@ -9,12 +9,12 @@ require (
 	github.com/itchyny/gojq v0.12.14
 	github.com/jcchavezs/porto v0.6.0
 	github.com/wadey/gocovmerge v0.0.0-20160331181800-b5bfa59ec0ad
-	go.opentelemetry.io/build-tools/crosslink v0.12.0
-	go.opentelemetry.io/build-tools/dbotconf v0.12.0
-	go.opentelemetry.io/build-tools/gotmpl v0.12.0
-	go.opentelemetry.io/build-tools/multimod v0.12.0
-	go.opentelemetry.io/build-tools/semconvgen v0.12.0
-	golang.org/x/exp v0.0.0-20230510235704-dd950f8aeaea
+	go.opentelemetry.io/build-tools/crosslink v0.13.0
+	go.opentelemetry.io/build-tools/dbotconf v0.13.0
+	go.opentelemetry.io/build-tools/gotmpl v0.13.0
+	go.opentelemetry.io/build-tools/multimod v0.13.0
+	go.opentelemetry.io/build-tools/semconvgen v0.13.0
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9
 	golang.org/x/tools v0.18.0
 	golang.org/x/vuln v1.0.4
 )
@@ -58,7 +58,7 @@ require (
 	github.com/curioswitch/go-reassign v0.2.0 // indirect
 	github.com/cyphar/filepath-securejoin v0.2.4 // indirect
 	github.com/daixiang0/gci v0.11.2 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/denis-tingaikin/go-header v0.4.3 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/esimonov/ifshort v1.0.4 // indirect
@@ -66,7 +66,7 @@ require (
 	github.com/fatih/color v1.15.0 // indirect
 	github.com/fatih/structtag v1.2.0 // indirect
 	github.com/firefart/nonamedreturns v1.0.4 // indirect
-	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/fzipp/gocyclo v0.6.0 // indirect
 	github.com/ghostiam/protogetter v0.2.3 // indirect
 	github.com/go-critic/go-critic v0.9.0 // indirect
@@ -130,7 +130,6 @@ require (
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
-	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
 	github.com/mbilski/exhaustivestruct v1.2.0 // indirect
 	github.com/mgechev/revive v1.3.4 // indirect
 	github.com/mitchellh/go-homedir v1.1.0 // indirect
@@ -141,13 +140,13 @@ require (
 	github.com/nishanths/predeclared v0.2.2 // indirect
 	github.com/nunnatsa/ginkgolinter v0.14.1 // indirect
 	github.com/olekukonko/tablewriter v0.0.5 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
 	github.com/pjbgf/sha1cd v0.3.0 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/polyfloyd/go-errorlint v1.4.5 // indirect
-	github.com/prometheus/client_golang v1.18.0 // indirect
+	github.com/prometheus/client_golang v1.19.0 // indirect
 	github.com/prometheus/client_model v0.6.0 // indirect
-	github.com/prometheus/common v0.45.0 // indirect
+	github.com/prometheus/common v0.48.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
 	github.com/quasilyte/go-ruleguard v0.4.0 // indirect
 	github.com/quasilyte/gogrep v0.5.0 // indirect
@@ -156,6 +155,8 @@ require (
 	github.com/rivo/uniseg v0.4.4 // indirect
 	github.com/ryancurrah/gomodguard v1.3.0 // indirect
 	github.com/ryanrolds/sqlclosecheck v0.5.1 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
 	github.com/sanposhiho/wastedassign/v2 v2.0.7 // indirect
 	github.com/sashamelentyev/interfacebloat v1.1.0 // indirect
 	github.com/sashamelentyev/usestdlibvars v1.24.0 // indirect
@@ -168,18 +169,18 @@ require (
 	github.com/sivchari/tenv v1.7.1 // indirect
 	github.com/skeema/knownhosts v1.2.1 // indirect
 	github.com/sonatard/noctx v0.0.2 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
 	github.com/sourcegraph/go-diff v0.7.0 // indirect
-	github.com/spf13/afero v1.9.5 // indirect
-	github.com/spf13/cast v1.5.1 // indirect
-	github.com/spf13/cobra v1.7.0 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/spf13/cobra v1.8.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/spf13/viper v1.16.0 // indirect
+	github.com/spf13/viper v1.18.2 // indirect
 	github.com/ssgreg/nlreturn/v2 v2.2.1 // indirect
 	github.com/stbenjam/no-sprintf-host-port v0.1.1 // indirect
-	github.com/stretchr/objx v0.5.0 // indirect
-	github.com/stretchr/testify v1.8.4 // indirect
-	github.com/subosito/gotenv v1.4.2 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
+	github.com/stretchr/testify v1.9.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/t-yuki/gocover-cobertura v0.0.0-20180217150009-aaee18c8195c // indirect
 	github.com/tdakkota/asciicheck v0.2.0 // indirect
 	github.com/tetafro/godot v1.4.15 // indirect
@@ -197,10 +198,10 @@ require (
 	github.com/ykadowak/zerologlint v0.1.3 // indirect
 	gitlab.com/bosi/decorder v0.4.1 // indirect
 	go-simpler.org/sloglint v0.1.2 // indirect
-	go.opentelemetry.io/build-tools v0.12.0 // indirect
+	go.opentelemetry.io/build-tools v0.13.0 // indirect
 	go.tmz.dev/musttag v0.7.2 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	go.uber.org/zap v1.26.0 // indirect
+	go.uber.org/zap v1.27.0 // indirect
 	golang.org/x/crypto v0.19.0 // indirect
 	golang.org/x/exp/typeparams v0.0.0-20230307190834-24139beb5833 // indirect
 	golang.org/x/mod v0.15.0 // indirect
diff --git a/internal/tools/go.sum b/internal/tools/go.sum
index 86e1fa98ed4..2e35003affa 100644
--- a/internal/tools/go.sum
+++ b/internal/tools/go.sum
@@ -7,7 +7,6 @@ cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
 cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
 cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.44.3/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
 cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
 cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
 cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
@@ -18,9 +17,6 @@ cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKV
 cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
 cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
 cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
-cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
-cloud.google.com/go v0.75.0/go.mod h1:VGuuCn7PG0dwsd5XPVm2Mm3wlh3EL55/79EKB6hlPTY=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
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@@ -38,7 +34,6 @@ cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0Zeo
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-cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3fOKtUw0Xmo=
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@@ -70,9 +65,11 @@ github.com/OpenPeeDeeP/depguard/v2 v2.1.0/go.mod h1:PUBgk35fX4i7JDmwzlJwJ+GMe6Nf
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+github.com/alecthomas/repr v0.2.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
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@@ -85,7 +82,9 @@ github.com/alexkohler/prealloc v1.0.0/go.mod h1:VetnK3dIgFBBKmg0YnD9F9x6Icjd+9cv
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+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
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+github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
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@@ -131,9 +130,7 @@ github.com/cloudflare/circl v1.3.3/go.mod h1:5XYMA4rFBvNIrhs50XuiBJ15vF2pZn4nnUK
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-github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
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@@ -141,18 +138,18 @@ github.com/cyphar/filepath-securejoin v0.2.4/go.mod h1:aPGpWjXOXUn2NCNjFvBE6aRxG
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+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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@@ -164,14 +161,16 @@ github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4
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-github.com/frankban/quicktest v1.14.4 h1:g2rn0vABPOOXmZUj+vbmUp0lPoXEMuhTpIluN0XL9UY=
-github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
-github.com/fsnotify/fsnotify v1.6.0/go.mod h1:sl3t1tCWJFWoRz9R8WJCbQihKKwmorjAbSClcnxKAGw=
+github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
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+github.com/gliderlabs/ssh v0.3.5/go.mod h1:8XB4KraRrX39qHhT6yxPsHedjA08I/uBVwj4xC+/+z4=
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@@ -179,6 +178,7 @@ github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376/go.mod h1:an3vInlBmS
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+github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399/go.mod h1:1OCfN199q1Jm3HZlxleg+Dw/mwps2Wbk9frAWm+4FII=
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@@ -191,8 +191,10 @@ github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9
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+github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
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+github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
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@@ -205,6 +207,7 @@ github.com/go-toolsmith/astfmt v1.1.0/go.mod h1:OrcLlRwu0CuiIBp/8b5PYF9ktGVZUjlN
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+github.com/go-toolsmith/pkgload v1.2.2/go.mod h1:R2hxLNRKuAsiXCo2i5J6ZQPhnPMOVtU+f0arbFPWCus=
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@@ -271,6 +274,7 @@ github.com/golangci/unconvert v0.0.0-20180507085042-28b1c447d1f4/go.mod h1:Izgrg
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+github.com/google/go-cmdtest v0.4.1-0.20220921163831-55ab3332a786/go.mod h1:apVn/GCasLZUVpAJ6oWAuyP7Ne7CEsQbTnc0plM3m+o=
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@@ -288,7 +292,6 @@ github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
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-github.com/google/martian/v3 v3.1.0/go.mod h1:y5Zk1BBys9G+gd6Jrk0W3cC1+ELVxBWuIGO+w/tUAp0=
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@@ -296,16 +299,12 @@ github.com/google/pprof v0.0.0-20200212024743-f11f1df84d12/go.mod h1:ZgVRPoUq/hf
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@@ -319,6 +318,7 @@ github.com/gostaticanalysis/nilerr v0.1.1 h1:ThE+hJP0fEp4zWLkWHWcRyI2Od0p7DlgYG3
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@@ -333,7 +333,6 @@ github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T
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@@ -372,13 +371,14 @@ github.com/kkHAIKE/contextcheck v1.1.4 h1:B6zAaLhOEEcjvUgIYEqystmnFk1Oemn8bvJhbt
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@@ -414,8 +414,6 @@ github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m
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@@ -444,24 +442,27 @@ github.com/nunnatsa/ginkgolinter v0.14.1/go.mod h1:nY0pafUSst7v7F637e7fymaMlQqI9
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@@ -469,8 +470,8 @@ github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5Fsn
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@@ -503,11 +504,16 @@ github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
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@@ -538,20 +544,20 @@ github.com/skeema/knownhosts v1.2.1 h1:SHWdIUa82uGZz+F+47k8SY4QhhI291cXCpopT1lK2
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@@ -559,8 +565,9 @@ github.com/stbenjam/no-sprintf-host-port v0.1.1/go.mod h1:TLhvtIvONRzdmkFiio4O8L
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@@ -569,11 +576,11 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
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@@ -620,6 +627,7 @@ github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5t
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@@ -627,36 +635,34 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
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@@ -672,8 +678,8 @@ golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
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@@ -690,7 +696,6 @@ golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHl
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 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
@@ -699,7 +704,6 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
@@ -739,9 +743,6 @@ golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81R
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.0.0-20201031054903-ff519b6c9102/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.0.0-20201209123823-ac852fbbde11/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20201224014010-6772e930b67b/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
@@ -760,10 +761,6 @@ golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4Iltr
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20191202225959-858c2ad4c8b6/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
-golang.org/x/oauth2 v0.0.0-20201109201403-9fd604954f58/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
-golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
-golang.org/x/oauth2 v0.0.0-20210218202405-ba52d332ba99/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210514164344-f6687ab2804c/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -812,17 +809,12 @@ golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20201201145000-ef89a241ccb3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210104204734-6f8348627aad/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210225134936-a50acf3fe073/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -834,7 +826,6 @@ golang.org/x/sys v0.0.0-20220702020025-31831981b65f/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -851,12 +842,12 @@ golang.org/x/term v0.4.0/go.mod h1:9P2UbLfCdcvo3p/nzKvsmas4TnlujnuoV9hGgYzW1lQ=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
 golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
 golang.org/x/term v0.17.0 h1:mkTF7LCd6WGJNL3K1Ad7kwxNfYAW6a8a8QqtMblp/4U=
+golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
@@ -916,15 +907,9 @@ golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc
 golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200820010801-b793a1359eac/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
-golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201001104356-43ebab892c4c/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20201110124207-079ba7bd75cd/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20201201161351-ac6f37ff4c2a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20201208233053-a543418bbed2/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20210105154028-b0ab187a4818/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20210108195828-e2f9c7f1fc8e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
 golang.org/x/tools v0.1.1-0.20210205202024-ef80cdb6ec6d/go.mod h1:9bzcO0MWcOuT0tm1iBGzDVPshzfwoVvREIui8C+MHqU=
 golang.org/x/tools v0.1.1-0.20210302220138-2ac05c832e1a/go.mod h1:9bzcO0MWcOuT0tm1iBGzDVPshzfwoVvREIui8C+MHqU=
@@ -962,16 +947,12 @@ google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0M
 google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
 google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
-google.golang.org/api v0.35.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
-google.golang.org/api v0.36.0/go.mod h1:+z5ficQTmoYpPn8LCUNVpK5I7hwkpjbcgqA7I34qYtE=
-google.golang.org/api v0.40.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjRCQ8=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -1001,13 +982,6 @@ google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7Fc
 google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201109203340-2640f1f9cdfb/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201201144952-b05cb90ed32e/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201210142538-e3217bee35cc/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201214200347-8c77b98c765d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20210108203827-ffc7fda8c3d7/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20210226172003-ab064af71705/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
@@ -1020,10 +994,6 @@ google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKa
 google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
 google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
 google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
-google.golang.org/grpc v1.34.0/go.mod h1:WotjhfgOW/POjDeRt8vscBtXq+2VjORFy659qA51WJ8=
-google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -1043,6 +1013,7 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
 gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
diff --git a/internal/tools/semconvkit/main.go b/internal/tools/semconvkit/main.go
index ce8e9168cc9..4ac57869414 100644
--- a/internal/tools/semconvkit/main.go
+++ b/internal/tools/semconvkit/main.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconvkit is used to generate opentelemetry-go specific semantic
 // convention code. It is expected to be used in with the semconvgen utility
diff --git a/internal/tools/semconvkit/templates/doc.go.tmpl b/internal/tools/semconvkit/templates/doc.go.tmpl
index 4a45fb295da..d5ab565ac9f 100644
--- a/internal/tools/semconvkit/templates/doc.go.tmpl
+++ b/internal/tools/semconvkit/templates/doc.go.tmpl
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/internal/tools/semconvkit/templates/exception.go.tmpl b/internal/tools/semconvkit/templates/exception.go.tmpl
index 9aa3f5fe65a..29d40112e5e 100644
--- a/internal/tools/semconvkit/templates/exception.go.tmpl
+++ b/internal/tools/semconvkit/templates/exception.go.tmpl
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/{{.TagVer}}"
 
diff --git a/internal/tools/semconvkit/templates/schema.go.tmpl b/internal/tools/semconvkit/templates/schema.go.tmpl
index b23608e02ad..b1fea015313 100644
--- a/internal/tools/semconvkit/templates/schema.go.tmpl
+++ b/internal/tools/semconvkit/templates/schema.go.tmpl
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/{{.TagVer}}"
 
diff --git a/internal/tools/tools.go b/internal/tools/tools.go
index 44d113314ed..9ec96441287 100644
--- a/internal/tools/tools.go
+++ b/internal/tools/tools.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build tools
 // +build tools
diff --git a/internal_logging.go b/internal_logging.go
index c4f8acd5d83..6de7f2e4d88 100644
--- a/internal_logging.go
+++ b/internal_logging.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel // import "go.opentelemetry.io/otel"
 
diff --git a/internal_logging_test.go b/internal_logging_test.go
index 57006334ae3..efa24db6358 100644
--- a/internal_logging_test.go
+++ b/internal_logging_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel_test
 
diff --git a/log/DESIGN.md b/log/DESIGN.md
index e961a45a3b2..a1a78a72efd 100644
--- a/log/DESIGN.md
+++ b/log/DESIGN.md
@@ -774,7 +774,6 @@ and we may even have problems naming the functions.
 The Logs Bridge API MUST NOT be released as stable
 before all issues below are closed:
 
-- [Clarify that log attributes are NOT common attributes](https://github.com/open-telemetry/opentelemetry-specification/issues/3849)
 - [Clarify handling empty (null) values in Logs Data Model](https://github.com/open-telemetry/opentelemetry-specification/issues/3835)
 - [Clarify attributes parameter type of Get a Logger operation](https://github.com/open-telemetry/opentelemetry-specification/issues/3841)
 
diff --git a/log/doc.go b/log/doc.go
index c6f5ad4a725..420b6898e89 100644
--- a/log/doc.go
+++ b/log/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package log provides the OpenTelemetry Logs Bridge API.
@@ -36,11 +25,11 @@ make:
   - Default to another implementation
 
 All interfaces in this API embed a corresponding interface from
-go.opentelemetry.io/otel/log/embedded. If an author wants the default behavior
-of their implementations to be a compilation failure, signaling to their users
-they need to update to the latest version of that implementation, they need to
-embed the corresponding interface from go.opentelemetry.io/otel/log/embedded in
-their implementation. For example,
+[go.opentelemetry.io/otel/log/embedded]. If an author wants the default
+behavior of their implementations to be a compilation failure, signaling to
+their users they need to update to the latest version of that implementation,
+they need to embed the corresponding interface from
+[go.opentelemetry.io/otel/log/embedded] in their implementation. For example,
 
 	import "go.opentelemetry.io/otel/log/embedded"
 
@@ -61,12 +50,12 @@ they need to embed the API interface directly.
 
 This is not a recommended behavior as it could lead to publishing packages that
 contain runtime panics when users update other package that use newer versions
-of go.opentelemetry.io/otel/log.
+of [go.opentelemetry.io/otel/log].
 
 Finally, an author can embed another implementation in theirs. The embedded
 implementation will be used for methods not defined by the author. For example,
 an author who wants to default to silently dropping the call can use
-o.opentelemetry.io/otel/log/noop:
+[go.opentelemetry.io/otel/log/noop]:
 
 	import "go.opentelemetry.io/otel/log/noop"
 
diff --git a/log/embedded/embedded.go b/log/embedded/embedded.go
index eeecbdae1f2..a3714c4c69a 100644
--- a/log/embedded/embedded.go
+++ b/log/embedded/embedded.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package embedded provides interfaces embedded within the [OpenTelemetry Logs
 // Bridge API].
@@ -21,7 +10,7 @@
 // API] is extended (which is something that can happen without a major version
 // bump of the API package).
 //
-// [OpenTelemetry Logs Bridge API]: https://github.com/open-telemetry/opentelemetry-go/tree/d3dcb3999c5689a7bb803cb0529e55a651ed14f1/log
+// [OpenTelemetry Logs Bridge API]: https://pkg.go.dev/go.opentelemetry.io/otel/log
 package embedded // import "go.opentelemetry.io/otel/log/embedded"
 
 // LoggerProvider is embedded in the [Logs Bridge API LoggerProvider].
@@ -32,7 +21,7 @@ package embedded // import "go.opentelemetry.io/otel/log/embedded"
 // Bridge API LoggerProvider] interface is extended (which is something that
 // can happen without a major version bump of the API package).
 //
-// [Logs Bridge API LoggerProvider]: https://github.com/open-telemetry/opentelemetry-go/blob/d3dcb3999c5689a7bb803cb0529e55a651ed14f1/log/provider.go#L22-L32
+// [Logs Bridge API LoggerProvider]: https://pkg.go.dev/go.opentelemetry.io/otel/log#LoggerProvider
 type LoggerProvider interface{ loggerProvider() }
 
 // Logger is embedded in [Logs Bridge API Logger].
@@ -43,5 +32,5 @@ type LoggerProvider interface{ loggerProvider() }
 // interface is extended (which is something that can happen without a major
 // version bump of the API package).
 //
-// [Logs Bridge API Logger]: https://github.com/open-telemetry/opentelemetry-go/blob/d3dcb3999c5689a7bb803cb0529e55a651ed14f1/log/logger.go#L28-L39
+// [Logs Bridge API Logger]: https://pkg.go.dev/go.opentelemetry.io/otel/log#Logger
 type Logger interface{ logger() }
diff --git a/log/go.mod b/log/go.mod
index aa71df96752..6b11f605f70 100644
--- a/log/go.mod
+++ b/log/go.mod
@@ -1,16 +1,16 @@
 module go.opentelemetry.io/otel/log
 
-go 1.20
+go 1.21
 
 require (
 	github.com/go-logr/logr v1.4.1
-	github.com/go-logr/stdr v1.2.2
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
diff --git a/log/go.sum b/log/go.sum
index 75d8b1f55b4..e91d3265de8 100644
--- a/log/go.sum
+++ b/log/go.sum
@@ -6,10 +6,11 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/log/keyvalue.go b/log/keyvalue.go
index 1416284366c..bb55f0d2270 100644
--- a/log/keyvalue.go
+++ b/log/keyvalue.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:generate stringer -type=Kind -trimprefix=Kind
 
@@ -20,6 +9,7 @@ import (
 	"bytes"
 	"errors"
 	"math"
+	"slices"
 	"unsafe"
 
 	"go.opentelemetry.io/otel/internal/global"
@@ -261,11 +251,9 @@ func (v Value) Equal(w Value) bool {
 	case KindFloat64:
 		return v.asFloat64() == w.asFloat64()
 	case KindSlice:
-		// TODO: replace with slices.EqualFunc when Go 1.20 support dropped.
-		return sliceEqualFunc(v.asSlice(), w.asSlice(), Value.Equal)
+		return slices.EqualFunc(v.asSlice(), w.asSlice(), Value.Equal)
 	case KindMap:
-		// TODO: replace with slices.EqualFunc when Go 1.20 support dropped.
-		return sliceEqualFunc(v.asMap(), w.asMap(), KeyValue.Equal)
+		return slices.EqualFunc(v.asMap(), w.asMap(), KeyValue.Equal)
 	case KindBytes:
 		return bytes.Equal(v.asBytes(), w.asBytes())
 	case KindEmpty:
@@ -276,30 +264,6 @@ func (v Value) Equal(w Value) bool {
 	}
 }
 
-// sliceEqualFunc reports whether two slices are equal using an equality
-// function on each pair of elements. If the lengths are different,
-// sliceEqualFunc returns false. Otherwise, the elements are compared in
-// increasing index order, and the comparison stops at the first index for
-// which eq returns false.
-//
-// This is based on [EqualFunc]. It was added to provide backwards
-// compatibility for Go 1.20. When Go 1.20 is no longer supported it can be
-// removed.
-//
-// EqualFunc: https://pkg.go.dev/slices#EqualFunc
-func sliceEqualFunc[T any](s1 []T, s2 []T, eq func(T, T) bool) bool {
-	if len(s1) != len(s2) {
-		return false
-	}
-	for i, v1 := range s1 {
-		v2 := s2[i]
-		if !eq(v1, v2) {
-			return false
-		}
-	}
-	return true
-}
-
 // An KeyValue is a key-value pair used to represent a log attribute (a
 // superset of [go.opentelemetry.io/otel/attribute.KeyValue]) and map item.
 type KeyValue struct {
diff --git a/log/keyvalue_bench_test.go b/log/keyvalue_bench_test.go
index 15d78838dae..ede54e54821 100644
--- a/log/keyvalue_bench_test.go
+++ b/log/keyvalue_bench_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package log_test
 
diff --git a/log/keyvalue_test.go b/log/keyvalue_test.go
index c6e4e03a91e..098334b8f29 100644
--- a/log/keyvalue_test.go
+++ b/log/keyvalue_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Copyright 2022 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -19,13 +8,10 @@
 package log_test
 
 import (
-	golog "log"
-	"os"
 	"testing"
 
 	"github.com/go-logr/logr"
 	"github.com/go-logr/logr/testr"
-	"github.com/go-logr/stdr"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
@@ -273,13 +259,14 @@ func (l *logSink) Error(err error, msg string, keysAndValues ...interface{}) {
 	l.LogSink.Error(err, msg, keysAndValues)
 }
 
-var stdLogger = stdr.New(golog.New(os.Stderr, "", golog.LstdFlags|golog.Lshortfile))
-
 func testErrKind[T any](f func() T, msg string, k log.Kind) func(*testing.T) {
 	return func(t *testing.T) {
+		t.Cleanup(func(l logr.Logger) func() {
+			return func() { global.SetLogger(l) }
+		}(global.GetLogger()))
+
 		l := &logSink{LogSink: testr.New(t).GetSink()}
 		global.SetLogger(logr.New(l))
-		t.Cleanup(func() { global.SetLogger(stdLogger) })
 
 		assert.Zero(t, f())
 
diff --git a/log/logger.go b/log/logger.go
index 555365219a5..56843afe366 100644
--- a/log/logger.go
+++ b/log/logger.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package log // import "go.opentelemetry.io/otel/log"
 
diff --git a/log/logger_test.go b/log/logger_test.go
index 4367ed33a5d..23f2ab64be0 100644
--- a/log/logger_test.go
+++ b/log/logger_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package log_test
 
diff --git a/log/noop/noop.go b/log/noop/noop.go
index 936a9f5ff78..be5a6ba5cbb 100644
--- a/log/noop/noop.go
+++ b/log/noop/noop.go
@@ -1,26 +1,17 @@
 // Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package noop provides an implementation of the [OpenTelemetry Logs Bridge
+// API] that produces no telemetry and minimizes used computation resources.
 //
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package noop provides an implementation of the OpenTelemetry Logs Bridge API
-// that produces no telemetry and minimizes used computation resources.
-//
-// Using this package to implement the OpenTelemetry Logs Bridge API will
+// Using this package to implement the [OpenTelemetry Logs Bridge API] will
 // effectively disable OpenTelemetry.
 //
 // This implementation can be embedded in other implementations of the
-// OpenTelemetry Logs Bridge API. Doing so will mean the implementation
+// [OpenTelemetry Logs Bridge API]. Doing so will mean the implementation
 // defaults to no operation for methods it does not implement.
+//
+// [OpenTelemetry Logs Bridge API]: https://pkg.go.dev/go.opentelemetry.io/otel/log
 package noop // import "go.opentelemetry.io/otel/log/noop"
 
 import (
diff --git a/log/noop/noop_test.go b/log/noop/noop_test.go
index 079f8f2888f..61a4f54de7b 100644
--- a/log/noop/noop_test.go
+++ b/log/noop/noop_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package noop // import "go.opentelemetry.io/otel/log/noop"
 
diff --git a/log/provider.go b/log/provider.go
index 4a0da402367..caa89ac024e 100644
--- a/log/provider.go
+++ b/log/provider.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package log // import "go.opentelemetry.io/otel/log"
 
diff --git a/log/record.go b/log/record.go
index 4647a7ee57f..96302f00624 100644
--- a/log/record.go
+++ b/log/record.go
@@ -1,20 +1,12 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package log // import "go.opentelemetry.io/otel/log"
 
-import "time"
+import (
+	"slices"
+	"time"
+)
 
 // attributesInlineCount is the number of attributes that are efficiently
 // stored in an array within a Record. This value is borrowed from slog which
@@ -125,26 +117,10 @@ func (r *Record) AddAttributes(attrs ...KeyValue) {
 		r.nFront++
 	}
 
-	// TODO: when Go 1.20 is no longer supported, use slices.Grow instead.
-	r.back = grow(r.back, len(attrs[i:]))
+	r.back = slices.Grow(r.back, len(attrs[i:]))
 	r.back = append(r.back, attrs[i:]...)
 }
 
-// grow increases the slice's capacity, if necessary, to guarantee space for
-// another n elements. After grow(n), at least n elements can be appended to
-// the slice without another allocation.
-//
-// This is based on [Grow]. It is not available in Go 1.20 so it is reproduced
-// here.
-//
-// [Grow]: https://pkg.go.dev/slices#Grow
-func grow(slice []KeyValue, n int) []KeyValue {
-	if n -= cap(slice) - len(slice); n > 0 {
-		slice = append(slice[:cap(slice)], make([]KeyValue, n)...)[:len(slice)]
-	}
-	return slice
-}
-
 // AttributesLen returns the number of attributes in the log record.
 func (r *Record) AttributesLen() int {
 	return r.nFront + len(r.back)
diff --git a/log/record_bench_test.go b/log/record_bench_test.go
index b83845ad9c7..4a7c0b31b3a 100644
--- a/log/record_bench_test.go
+++ b/log/record_bench_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package log_test
 
diff --git a/log/record_test.go b/log/record_test.go
index f17f4f8d213..5a7487740d2 100644
--- a/log/record_test.go
+++ b/log/record_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package log_test
 
diff --git a/log/severity.go b/log/severity.go
index 45edd681a78..5ef8826a07c 100644
--- a/log/severity.go
+++ b/log/severity.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:generate stringer -type=Severity -linecomment
 
diff --git a/log/severity_test.go b/log/severity_test.go
index 12aa5538f07..cd153d20d02 100644
--- a/log/severity_test.go
+++ b/log/severity_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package log_test
 
diff --git a/metric.go b/metric.go
index f955171951f..1e6473b32f3 100644
--- a/metric.go
+++ b/metric.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel // import "go.opentelemetry.io/otel"
 
diff --git a/metric/asyncfloat64.go b/metric/asyncfloat64.go
index 072baa8e8d0..c7234f4bc8d 100644
--- a/metric/asyncfloat64.go
+++ b/metric/asyncfloat64.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/asyncfloat64_test.go b/metric/asyncfloat64_test.go
index 845d63d3e8e..7ef2b0d0236 100644
--- a/metric/asyncfloat64_test.go
+++ b/metric/asyncfloat64_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/asyncint64.go b/metric/asyncint64.go
index 9bd6ebf0205..c82ba5324e2 100644
--- a/metric/asyncint64.go
+++ b/metric/asyncint64.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/asyncint64_test.go b/metric/asyncint64_test.go
index 5b1bdb75124..bc39e996de2 100644
--- a/metric/asyncint64_test.go
+++ b/metric/asyncint64_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/config.go b/metric/config.go
index 778ad2d748b..d9e3b13e4d1 100644
--- a/metric/config.go
+++ b/metric/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/config_test.go b/metric/config_test.go
index b529b725948..f5e65150faa 100644
--- a/metric/config_test.go
+++ b/metric/config_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric_test
 
diff --git a/metric/doc.go b/metric/doc.go
index 54716e13b35..075234b3380 100644
--- a/metric/doc.go
+++ b/metric/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package metric provides the OpenTelemetry API used to measure metrics about
diff --git a/metric/embedded/embedded.go b/metric/embedded/embedded.go
index ae0bdbd2e64..15bebae084a 100644
--- a/metric/embedded/embedded.go
+++ b/metric/embedded/embedded.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package embedded provides interfaces embedded within the [OpenTelemetry
 // metric API].
diff --git a/metric/example_test.go b/metric/example_test.go
index 5e1cfb38ec8..da1cb572ec5 100644
--- a/metric/example_test.go
+++ b/metric/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric_test
 
diff --git a/metric/go.mod b/metric/go.mod
index d4bcf5fa04a..ae0fa59c693 100644
--- a/metric/go.mod
+++ b/metric/go.mod
@@ -1,9 +1,9 @@
 module go.opentelemetry.io/otel/metric
 
-go 1.20
+go 1.21
 
 require (
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 )
 
diff --git a/metric/go.sum b/metric/go.sum
index 75d8b1f55b4..e91d3265de8 100644
--- a/metric/go.sum
+++ b/metric/go.sum
@@ -6,10 +6,11 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/metric/instrument.go b/metric/instrument.go
index be89cd53341..451413192a9 100644
--- a/metric/instrument.go
+++ b/metric/instrument.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/instrument_test.go b/metric/instrument_test.go
index 0d2d1b067fc..15a6e9e9c71 100644
--- a/metric/instrument_test.go
+++ b/metric/instrument_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/meter.go b/metric/meter.go
index 2520bc74af1..7aa82e0c17b 100644
--- a/metric/meter.go
+++ b/metric/meter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/noop/noop.go b/metric/noop/noop.go
index acc9a670b22..4524a57d251 100644
--- a/metric/noop/noop.go
+++ b/metric/noop/noop.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package noop provides an implementation of the OpenTelemetry metric API that
 // produces no telemetry and minimizes used computation resources.
diff --git a/metric/noop/noop_test.go b/metric/noop/noop_test.go
index b4acae1847b..a325f19bb35 100644
--- a/metric/noop/noop_test.go
+++ b/metric/noop/noop_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package noop // import "go.opentelemetry.io/otel/metric/noop"
 
diff --git a/metric/syncfloat64.go b/metric/syncfloat64.go
index 0a4825ae6a7..5420d546eb7 100644
--- a/metric/syncfloat64.go
+++ b/metric/syncfloat64.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/syncfloat64_test.go b/metric/syncfloat64_test.go
index 4b3bbfdec29..13d6296dde1 100644
--- a/metric/syncfloat64_test.go
+++ b/metric/syncfloat64_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/syncint64.go b/metric/syncint64.go
index 56667d32fc0..0dcbf06db99 100644
--- a/metric/syncint64.go
+++ b/metric/syncint64.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric/syncint64_test.go b/metric/syncint64_test.go
index ece9c7fbb50..b648de67b21 100644
--- a/metric/syncint64_test.go
+++ b/metric/syncint64_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
diff --git a/metric_test.go b/metric_test.go
index 5e6e48fb8a0..6454dc07ff6 100644
--- a/metric_test.go
+++ b/metric_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel // import "go.opentelemetry.io/otel"
 
diff --git a/propagation.go b/propagation.go
index d29aaa32c0b..2fd9497338f 100644
--- a/propagation.go
+++ b/propagation.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel // import "go.opentelemetry.io/otel"
 
diff --git a/propagation/baggage.go b/propagation/baggage.go
index 303cdf1cbff..552263ba734 100644
--- a/propagation/baggage.go
+++ b/propagation/baggage.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation // import "go.opentelemetry.io/otel/propagation"
 
diff --git a/propagation/baggage_test.go b/propagation/baggage_test.go
index 3919c3d1d72..e6a71540fa2 100644
--- a/propagation/baggage_test.go
+++ b/propagation/baggage_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation_test
 
diff --git a/propagation/doc.go b/propagation/doc.go
index c119eb2858b..33a3baf15f1 100644
--- a/propagation/doc.go
+++ b/propagation/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package propagation contains OpenTelemetry context propagators.
diff --git a/propagation/propagation.go b/propagation/propagation.go
index c94438f73a5..8c8286aab4d 100644
--- a/propagation/propagation.go
+++ b/propagation/propagation.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation // import "go.opentelemetry.io/otel/propagation"
 
diff --git a/propagation/propagation_test.go b/propagation/propagation_test.go
index 03fca2ff2d5..9a807e1e081 100644
--- a/propagation/propagation_test.go
+++ b/propagation/propagation_test.go
@@ -1,22 +1,11 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation_test
 
 import (
 	"context"
-	"sort"
+	"slices"
 	"strings"
 	"testing"
 
@@ -130,6 +119,6 @@ func TestMapCarrierKeys(t *testing.T) {
 	}
 
 	keys := carrier.Keys()
-	sort.Strings(keys)
+	slices.Sort(keys)
 	assert.Equal(t, []string{"baz", "foo"}, keys)
 }
diff --git a/propagation/propagators_test.go b/propagation/propagators_test.go
index 1ac8786bc2c..15deba3263f 100644
--- a/propagation/propagators_test.go
+++ b/propagation/propagators_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation_test
 
diff --git a/propagation/trace_context.go b/propagation/trace_context.go
index 63e5d62221f..347ffe2b318 100644
--- a/propagation/trace_context.go
+++ b/propagation/trace_context.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation // import "go.opentelemetry.io/otel/propagation"
 
diff --git a/propagation/trace_context_benchmark_test.go b/propagation/trace_context_benchmark_test.go
index 0198af90b44..7b7ea5788dd 100644
--- a/propagation/trace_context_benchmark_test.go
+++ b/propagation/trace_context_benchmark_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation_test
 
diff --git a/propagation/trace_context_example_test.go b/propagation/trace_context_example_test.go
index 474b052617b..a92c96f2e7f 100644
--- a/propagation/trace_context_example_test.go
+++ b/propagation/trace_context_example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation_test
 
diff --git a/propagation/trace_context_test.go b/propagation/trace_context_test.go
index 3d575e1b418..4579fd19ea0 100644
--- a/propagation/trace_context_test.go
+++ b/propagation/trace_context_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package propagation_test
 
diff --git a/schema/go.mod b/schema/go.mod
index bfc2ab62789..6ae9e874c88 100644
--- a/schema/go.mod
+++ b/schema/go.mod
@@ -1,10 +1,10 @@
 module go.opentelemetry.io/otel/schema
 
-go 1.20
+go 1.21
 
 require (
 	github.com/Masterminds/semver/v3 v3.2.1
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
diff --git a/schema/go.sum b/schema/go.sum
index 839fe61dc7b..33580cc341a 100644
--- a/schema/go.sum
+++ b/schema/go.sum
@@ -4,8 +4,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/schema/internal/parser_checks.go b/schema/internal/parser_checks.go
index 1ea46939444..29485379741 100644
--- a/schema/internal/parser_checks.go
+++ b/schema/internal/parser_checks.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/schema/internal"
 
diff --git a/schema/internal/parser_checks_test.go b/schema/internal/parser_checks_test.go
index dab407de51c..d4c72f943b2 100644
--- a/schema/internal/parser_checks_test.go
+++ b/schema/internal/parser_checks_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/schema/internal"
 
diff --git a/schema/v1.0/ast/ast_schema.go b/schema/v1.0/ast/ast_schema.go
index 2d0cbc7a7e3..6b52bfab637 100644
--- a/schema/v1.0/ast/ast_schema.go
+++ b/schema/v1.0/ast/ast_schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package ast // import "go.opentelemetry.io/otel/schema/v1.0/ast"
 
diff --git a/schema/v1.0/ast/common.go b/schema/v1.0/ast/common.go
index 7321454f679..eeae33cb10a 100644
--- a/schema/v1.0/ast/common.go
+++ b/schema/v1.0/ast/common.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package ast // import "go.opentelemetry.io/otel/schema/v1.0/ast"
 
diff --git a/schema/v1.0/ast/logs.go b/schema/v1.0/ast/logs.go
index b555b0c7b6b..7638b3c19d1 100644
--- a/schema/v1.0/ast/logs.go
+++ b/schema/v1.0/ast/logs.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package ast // import "go.opentelemetry.io/otel/schema/v1.0/ast"
 
diff --git a/schema/v1.0/ast/metrics.go b/schema/v1.0/ast/metrics.go
index 9212ad89d91..9cc9d1f7a89 100644
--- a/schema/v1.0/ast/metrics.go
+++ b/schema/v1.0/ast/metrics.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package ast // import "go.opentelemetry.io/otel/schema/v1.0/ast"
 
diff --git a/schema/v1.0/ast/spans.go b/schema/v1.0/ast/spans.go
index fba7148a028..223d6dc1d4d 100644
--- a/schema/v1.0/ast/spans.go
+++ b/schema/v1.0/ast/spans.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package ast // import "go.opentelemetry.io/otel/schema/v1.0/ast"
 
diff --git a/schema/v1.0/parser.go b/schema/v1.0/parser.go
index 75a09bb0687..504385ae588 100644
--- a/schema/v1.0/parser.go
+++ b/schema/v1.0/parser.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package schema // import "go.opentelemetry.io/otel/schema/v1.0"
 
diff --git a/schema/v1.0/parser_test.go b/schema/v1.0/parser_test.go
index 36aba51ea5e..69a34bfe7b3 100644
--- a/schema/v1.0/parser_test.go
+++ b/schema/v1.0/parser_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package schema
 
diff --git a/schema/v1.0/types/types.go b/schema/v1.0/types/types.go
index 02caa4485a1..defac3151aa 100644
--- a/schema/v1.0/types/types.go
+++ b/schema/v1.0/types/types.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package types // import "go.opentelemetry.io/otel/schema/v1.0/types"
 
diff --git a/schema/v1.1/ast/ast_schema.go b/schema/v1.1/ast/ast_schema.go
index 9a62fc4297c..cc2ea9e72ba 100644
--- a/schema/v1.1/ast/ast_schema.go
+++ b/schema/v1.1/ast/ast_schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package ast // import "go.opentelemetry.io/otel/schema/v1.1/ast"
 
diff --git a/schema/v1.1/ast/metrics.go b/schema/v1.1/ast/metrics.go
index 0d0e3eacb38..fadec384ece 100644
--- a/schema/v1.1/ast/metrics.go
+++ b/schema/v1.1/ast/metrics.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package ast // import "go.opentelemetry.io/otel/schema/v1.1/ast"
 
diff --git a/schema/v1.1/parser.go b/schema/v1.1/parser.go
index 43b70524f38..217a62165fe 100644
--- a/schema/v1.1/parser.go
+++ b/schema/v1.1/parser.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package schema // import "go.opentelemetry.io/otel/schema/v1.1"
 
diff --git a/schema/v1.1/parser_test.go b/schema/v1.1/parser_test.go
index c4b35aebb55..419fe0c8001 100644
--- a/schema/v1.1/parser_test.go
+++ b/schema/v1.1/parser_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package schema
 
diff --git a/schema/v1.1/types/types.go b/schema/v1.1/types/types.go
index 1f703f57daf..f265857dc97 100644
--- a/schema/v1.1/types/types.go
+++ b/schema/v1.1/types/types.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package types // import "go.opentelemetry.io/otel/schema/v1.1/types"
 
diff --git a/sdk/go.mod b/sdk/go.mod
index 56290df1f1d..2a7f014c104 100644
--- a/sdk/go.mod
+++ b/sdk/go.mod
@@ -1,13 +1,13 @@
 module go.opentelemetry.io/otel/sdk
 
-go 1.20
+go 1.21
 
 replace go.opentelemetry.io/otel => ../
 
 require (
 	github.com/go-logr/logr v1.4.1
 	github.com/google/go-cmp v0.6.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
 	golang.org/x/sys v0.17.0
diff --git a/sdk/go.sum b/sdk/go.sum
index 572c786dfdb..08b2c141d1c 100644
--- a/sdk/go.sum
+++ b/sdk/go.sum
@@ -9,8 +9,8 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
diff --git a/sdk/instrumentation/doc.go b/sdk/instrumentation/doc.go
index 6e923acab43..a4faa6a03d5 100644
--- a/sdk/instrumentation/doc.go
+++ b/sdk/instrumentation/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package instrumentation provides types to represent the code libraries that
 // provide OpenTelemetry instrumentation. These types are used in the
diff --git a/sdk/instrumentation/library.go b/sdk/instrumentation/library.go
index 39f025a1715..f4d1857c4f4 100644
--- a/sdk/instrumentation/library.go
+++ b/sdk/instrumentation/library.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package instrumentation // import "go.opentelemetry.io/otel/sdk/instrumentation"
 
diff --git a/sdk/instrumentation/scope.go b/sdk/instrumentation/scope.go
index 09c6d93f6d0..728115045bb 100644
--- a/sdk/instrumentation/scope.go
+++ b/sdk/instrumentation/scope.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package instrumentation // import "go.opentelemetry.io/otel/sdk/instrumentation"
 
diff --git a/sdk/internal/env/env.go b/sdk/internal/env/env.go
index 59dcfab2501..7eaa0769602 100644
--- a/sdk/internal/env/env.go
+++ b/sdk/internal/env/env.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package env // import "go.opentelemetry.io/otel/sdk/internal/env"
 
diff --git a/sdk/internal/env/env_test.go b/sdk/internal/env/env_test.go
index 06da1f5a9e1..8f735648314 100644
--- a/sdk/internal/env/env_test.go
+++ b/sdk/internal/env/env_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package env
 
diff --git a/sdk/internal/gen.go b/sdk/internal/gen.go
index bd84f624b45..1fc19d3fe3f 100644
--- a/sdk/internal/gen.go
+++ b/sdk/internal/gen.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/sdk/internal"
 
diff --git a/sdk/internal/internal.go b/sdk/internal/internal.go
index dfeaaa8ca04..a990092f9d1 100644
--- a/sdk/internal/internal.go
+++ b/sdk/internal/internal.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/sdk/internal"
 
diff --git a/sdk/internal/internaltest/alignment.go b/sdk/internal/internaltest/alignment.go
index b75e19b2042..0e48fa41e61 100644
--- a/sdk/internal/internaltest/alignment.go
+++ b/sdk/internal/internaltest/alignment.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/alignment.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/sdk/internal/internaltest"
 
diff --git a/sdk/internal/internaltest/env.go b/sdk/internal/internaltest/env.go
index 3bdbef110b3..b75c0afe18b 100644
--- a/sdk/internal/internaltest/env.go
+++ b/sdk/internal/internaltest/env.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/env.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/sdk/internal/internaltest"
 
diff --git a/sdk/internal/internaltest/env_test.go b/sdk/internal/internaltest/env_test.go
index dc4dcea8e30..3fe33f92821 100644
--- a/sdk/internal/internaltest/env_test.go
+++ b/sdk/internal/internaltest/env_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/env_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/sdk/internal/internaltest/errors.go b/sdk/internal/internaltest/errors.go
index 4ed3b33252a..a717739bc48 100644
--- a/sdk/internal/internaltest/errors.go
+++ b/sdk/internal/internaltest/errors.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/errors.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/sdk/internal/internaltest"
 
diff --git a/sdk/internal/internaltest/harness.go b/sdk/internal/internaltest/harness.go
index b2d461ea0d9..ecc754d9d43 100644
--- a/sdk/internal/internaltest/harness.go
+++ b/sdk/internal/internaltest/harness.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/harness.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/sdk/internal/internaltest"
 
diff --git a/sdk/internal/internaltest/text_map_carrier.go b/sdk/internal/internaltest/text_map_carrier.go
index 4ca36454bb0..153cf6a15d7 100644
--- a/sdk/internal/internaltest/text_map_carrier.go
+++ b/sdk/internal/internaltest/text_map_carrier.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_carrier.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/sdk/internal/internaltest"
 
diff --git a/sdk/internal/internaltest/text_map_carrier_test.go b/sdk/internal/internaltest/text_map_carrier_test.go
index 086c8af26ea..1128221afad 100644
--- a/sdk/internal/internaltest/text_map_carrier_test.go
+++ b/sdk/internal/internaltest/text_map_carrier_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_carrier_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/sdk/internal/internaltest/text_map_propagator.go b/sdk/internal/internaltest/text_map_propagator.go
index 344075c3698..d1bd9269917 100644
--- a/sdk/internal/internaltest/text_map_propagator.go
+++ b/sdk/internal/internaltest/text_map_propagator.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_propagator.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest // import "go.opentelemetry.io/otel/sdk/internal/internaltest"
 
diff --git a/sdk/internal/internaltest/text_map_propagator_test.go b/sdk/internal/internaltest/text_map_propagator_test.go
index babcc95fc1b..eda9dbe55c7 100644
--- a/sdk/internal/internaltest/text_map_propagator_test.go
+++ b/sdk/internal/internaltest/text_map_propagator_test.go
@@ -2,18 +2,7 @@
 // source: internal/shared/internaltest/text_map_propagator_test.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internaltest
 
diff --git a/sdk/internal/matchers/expectation.go b/sdk/internal/matchers/expectation.go
index c48aff036e7..8dc353521ce 100644
--- a/sdk/internal/matchers/expectation.go
+++ b/sdk/internal/matchers/expectation.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/expectation.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/sdk/internal/matchers"
 
diff --git a/sdk/internal/matchers/expecter.go b/sdk/internal/matchers/expecter.go
index 089b6cf6d4b..fcf20b3159d 100644
--- a/sdk/internal/matchers/expecter.go
+++ b/sdk/internal/matchers/expecter.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/expecter.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/sdk/internal/matchers"
 
diff --git a/sdk/internal/matchers/temporal_matcher.go b/sdk/internal/matchers/temporal_matcher.go
index 7703064aced..3bc56d205eb 100644
--- a/sdk/internal/matchers/temporal_matcher.go
+++ b/sdk/internal/matchers/temporal_matcher.go
@@ -2,18 +2,7 @@
 // source: internal/shared/matchers/temporal_matcher.go.tmpl
 
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package matchers // import "go.opentelemetry.io/otel/sdk/internal/matchers"
 
diff --git a/sdk/metric/aggregation.go b/sdk/metric/aggregation.go
index faddbb0b61b..e6f5cfb2ad9 100644
--- a/sdk/metric/aggregation.go
+++ b/sdk/metric/aggregation.go
@@ -1,22 +1,12 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
 import (
 	"errors"
 	"fmt"
+	"slices"
 )
 
 // errAgg is wrapped by misconfigured aggregations.
@@ -141,10 +131,8 @@ func (h AggregationExplicitBucketHistogram) err() error {
 
 // copy returns a deep copy of h.
 func (h AggregationExplicitBucketHistogram) copy() Aggregation {
-	b := make([]float64, len(h.Boundaries))
-	copy(b, h.Boundaries)
 	return AggregationExplicitBucketHistogram{
-		Boundaries: b,
+		Boundaries: slices.Clone(h.Boundaries),
 		NoMinMax:   h.NoMinMax,
 	}
 }
diff --git a/sdk/metric/aggregation_test.go b/sdk/metric/aggregation_test.go
index 640fd7747e0..d8d1351957f 100644
--- a/sdk/metric/aggregation_test.go
+++ b/sdk/metric/aggregation_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric
 
diff --git a/sdk/metric/benchmark_test.go b/sdk/metric/benchmark_test.go
index fc089687525..b0eaa457c6b 100644
--- a/sdk/metric/benchmark_test.go
+++ b/sdk/metric/benchmark_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/cache.go b/sdk/metric/cache.go
index e9c0b38d0bc..63b88f08664 100644
--- a/sdk/metric/cache.go
+++ b/sdk/metric/cache.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/cache_test.go b/sdk/metric/cache_test.go
index 01ce2389d9e..c5ddbc055d4 100644
--- a/sdk/metric/cache_test.go
+++ b/sdk/metric/cache_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/config.go b/sdk/metric/config.go
index 0b191128494..9a41f94e979 100644
--- a/sdk/metric/config.go
+++ b/sdk/metric/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/config_test.go b/sdk/metric/config_test.go
index 42bf16a6a96..d51ce886097 100644
--- a/sdk/metric/config_test.go
+++ b/sdk/metric/config_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric
 
diff --git a/sdk/metric/doc.go b/sdk/metric/doc.go
index 475d3e39416..4f553a57153 100644
--- a/sdk/metric/doc.go
+++ b/sdk/metric/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package metric provides an implementation of the OpenTelemetry metrics SDK.
 //
diff --git a/sdk/metric/env.go b/sdk/metric/env.go
index 940ba815942..a6c403797f6 100644
--- a/sdk/metric/env.go
+++ b/sdk/metric/env.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/example_test.go b/sdk/metric/example_test.go
index cd84590b680..a4a7b93ee1d 100644
--- a/sdk/metric/example_test.go
+++ b/sdk/metric/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric_test
 
diff --git a/sdk/metric/exemplar.go b/sdk/metric/exemplar.go
index 3f1ce9f1d88..9155c242c71 100644
--- a/sdk/metric/exemplar.go
+++ b/sdk/metric/exemplar.go
@@ -1,22 +1,12 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
 import (
 	"os"
 	"runtime"
+	"slices"
 
 	"go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 	"go.opentelemetry.io/otel/sdk/metric/internal/x"
@@ -40,8 +30,7 @@ func reservoirFunc[N int64 | float64](agg Aggregation) func() exemplar.Reservoir
 		// use AlignedHistogramBucketExemplarReservoir.
 		a, ok := agg.(AggregationExplicitBucketHistogram)
 		if ok && len(a.Boundaries) > 0 {
-			cp := make([]float64, len(a.Boundaries))
-			copy(cp, a.Boundaries)
+			cp := slices.Clone(a.Boundaries)
 			return func() exemplar.Reservoir[N] {
 				bounds := cp
 				return exemplar.Histogram[N](bounds)
diff --git a/sdk/metric/exporter.go b/sdk/metric/exporter.go
index da8941b378d..1a3cccb6775 100644
--- a/sdk/metric/exporter.go
+++ b/sdk/metric/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/go.mod b/sdk/metric/go.mod
index c91598546d1..4a3592d5481 100644
--- a/sdk/metric/go.mod
+++ b/sdk/metric/go.mod
@@ -1,11 +1,11 @@
 module go.opentelemetry.io/otel/sdk/metric
 
-go 1.20
+go 1.21
 
 require (
 	github.com/go-logr/logr v1.4.1
 	github.com/go-logr/stdr v1.2.2
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 	go.opentelemetry.io/otel/metric v1.24.0
 	go.opentelemetry.io/otel/sdk v1.24.0
diff --git a/sdk/metric/go.sum b/sdk/metric/go.sum
index 30f0aa10ffa..08b2c141d1c 100644
--- a/sdk/metric/go.sum
+++ b/sdk/metric/go.sum
@@ -6,10 +6,11 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
diff --git a/sdk/metric/instrument.go b/sdk/metric/instrument.go
index a4cfcbb95f1..fa8ce053b6c 100644
--- a/sdk/metric/instrument.go
+++ b/sdk/metric/instrument.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:generate stringer -type=InstrumentKind -trimprefix=InstrumentKind
 
diff --git a/sdk/metric/instrument_test.go b/sdk/metric/instrument_test.go
index 29c2857c886..712fddc4558 100644
--- a/sdk/metric/instrument_test.go
+++ b/sdk/metric/instrument_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric
 
diff --git a/sdk/metric/internal/aggregate/aggregate.go b/sdk/metric/internal/aggregate/aggregate.go
index 4060a2f76d3..aa5229b09e4 100644
--- a/sdk/metric/internal/aggregate/aggregate.go
+++ b/sdk/metric/internal/aggregate/aggregate.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
diff --git a/sdk/metric/internal/aggregate/aggregate_test.go b/sdk/metric/internal/aggregate/aggregate_test.go
index be568f14c04..29481c506cd 100644
--- a/sdk/metric/internal/aggregate/aggregate_test.go
+++ b/sdk/metric/internal/aggregate/aggregate_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
diff --git a/sdk/metric/internal/aggregate/doc.go b/sdk/metric/internal/aggregate/doc.go
index e83a2693faf..7b7225e6ef9 100644
--- a/sdk/metric/internal/aggregate/doc.go
+++ b/sdk/metric/internal/aggregate/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package aggregate provides aggregate types used compute aggregations and
 // cycle the state of metric measurements made by the SDK. These types and
diff --git a/sdk/metric/internal/aggregate/exponential_histogram.go b/sdk/metric/internal/aggregate/exponential_histogram.go
index 4139a6d1560..77358886388 100644
--- a/sdk/metric/internal/aggregate/exponential_histogram.go
+++ b/sdk/metric/internal/aggregate/exponential_histogram.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
@@ -387,9 +376,11 @@ func (e *expoHistogram[N]) delta(dest *metricdata.Aggregation) int {
 
 		b.res.Collect(&hDPts[i].Exemplars)
 
-		delete(e.values, a)
 		i++
 	}
+	// Unused attribute sets do not report.
+	clear(e.values)
+
 	e.start = t
 	h.DataPoints = hDPts
 	*dest = h
diff --git a/sdk/metric/internal/aggregate/exponential_histogram_test.go b/sdk/metric/internal/aggregate/exponential_histogram_test.go
index 4773ee79845..df57fad1801 100644
--- a/sdk/metric/internal/aggregate/exponential_histogram_test.go
+++ b/sdk/metric/internal/aggregate/exponential_histogram_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate
 
diff --git a/sdk/metric/internal/aggregate/histogram.go b/sdk/metric/internal/aggregate/histogram.go
index a9a4706bf00..57557477f30 100644
--- a/sdk/metric/internal/aggregate/histogram.go
+++ b/sdk/metric/internal/aggregate/histogram.go
@@ -1,21 +1,11 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
 import (
 	"context"
+	"slices"
 	"sort"
 	"sync"
 	"time"
@@ -68,9 +58,8 @@ func newHistValues[N int64 | float64](bounds []float64, noSum bool, limit int, r
 	// passed boundaries is ultimately this type's responsibility. Make a copy
 	// here so we can always guarantee this. Or, in the case of failure, have
 	// complete control over the fix.
-	b := make([]float64, len(bounds))
-	copy(b, bounds)
-	sort.Float64s(b)
+	b := slices.Clone(bounds)
+	slices.Sort(b)
 	return &histValues[N]{
 		noSum:  noSum,
 		bounds: b,
@@ -150,8 +139,7 @@ func (s *histogram[N]) delta(dest *metricdata.Aggregation) int {
 	defer s.valuesMu.Unlock()
 
 	// Do not allow modification of our copy of bounds.
-	bounds := make([]float64, len(s.bounds))
-	copy(bounds, s.bounds)
+	bounds := slices.Clone(s.bounds)
 
 	n := len(s.values)
 	hDPts := reset(h.DataPoints, n, n)
@@ -176,10 +164,10 @@ func (s *histogram[N]) delta(dest *metricdata.Aggregation) int {
 
 		b.res.Collect(&hDPts[i].Exemplars)
 
-		// Unused attribute sets do not report.
-		delete(s.values, a)
 		i++
 	}
+	// Unused attribute sets do not report.
+	clear(s.values)
 	// The delta collection cycle resets.
 	s.start = t
 
@@ -201,28 +189,25 @@ func (s *histogram[N]) cumulative(dest *metricdata.Aggregation) int {
 	defer s.valuesMu.Unlock()
 
 	// Do not allow modification of our copy of bounds.
-	bounds := make([]float64, len(s.bounds))
-	copy(bounds, s.bounds)
+	bounds := slices.Clone(s.bounds)
 
 	n := len(s.values)
 	hDPts := reset(h.DataPoints, n, n)
 
 	var i int
 	for a, b := range s.values {
-		// The HistogramDataPoint field values returned need to be copies of
-		// the buckets value as we will keep updating them.
-		//
-		// TODO (#3047): Making copies for bounds and counts incurs a large
-		// memory allocation footprint. Alternatives should be explored.
-		counts := make([]uint64, len(b.counts))
-		copy(counts, b.counts)
-
 		hDPts[i].Attributes = a
 		hDPts[i].StartTime = s.start
 		hDPts[i].Time = t
 		hDPts[i].Count = b.count
 		hDPts[i].Bounds = bounds
-		hDPts[i].BucketCounts = counts
+
+		// The HistogramDataPoint field values returned need to be copies of
+		// the buckets value as we will keep updating them.
+		//
+		// TODO (#3047): Making copies for bounds and counts incurs a large
+		// memory allocation footprint. Alternatives should be explored.
+		hDPts[i].BucketCounts = slices.Clone(b.counts)
 
 		if !s.noSum {
 			hDPts[i].Sum = b.total
diff --git a/sdk/metric/internal/aggregate/histogram_test.go b/sdk/metric/internal/aggregate/histogram_test.go
index bd88b083492..6c1751c80c5 100644
--- a/sdk/metric/internal/aggregate/histogram_test.go
+++ b/sdk/metric/internal/aggregate/histogram_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
diff --git a/sdk/metric/internal/aggregate/lastvalue.go b/sdk/metric/internal/aggregate/lastvalue.go
index 5699e728f1f..2b725511dda 100644
--- a/sdk/metric/internal/aggregate/lastvalue.go
+++ b/sdk/metric/internal/aggregate/lastvalue.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
@@ -82,8 +71,8 @@ func (s *lastValue[N]) computeAggregation(dest *[]metricdata.DataPoint[N]) {
 		(*dest)[i].Time = v.timestamp
 		(*dest)[i].Value = v.value
 		v.res.Collect(&(*dest)[i].Exemplars)
-		// Do not report stale values.
-		delete(s.values, a)
 		i++
 	}
+	// Do not report stale values.
+	clear(s.values)
 }
diff --git a/sdk/metric/internal/aggregate/lastvalue_test.go b/sdk/metric/internal/aggregate/lastvalue_test.go
index 479232ad435..66ef3e785ab 100644
--- a/sdk/metric/internal/aggregate/lastvalue_test.go
+++ b/sdk/metric/internal/aggregate/lastvalue_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
diff --git a/sdk/metric/internal/aggregate/limit.go b/sdk/metric/internal/aggregate/limit.go
index d3de8427200..92f71f72dfe 100644
--- a/sdk/metric/internal/aggregate/limit.go
+++ b/sdk/metric/internal/aggregate/limit.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
diff --git a/sdk/metric/internal/aggregate/limit_test.go b/sdk/metric/internal/aggregate/limit_test.go
index cd524d33966..5abd7f194a4 100644
--- a/sdk/metric/internal/aggregate/limit_test.go
+++ b/sdk/metric/internal/aggregate/limit_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
diff --git a/sdk/metric/internal/aggregate/sum.go b/sdk/metric/internal/aggregate/sum.go
index 02de2483f3b..a3cac336539 100644
--- a/sdk/metric/internal/aggregate/sum.go
+++ b/sdk/metric/internal/aggregate/sum.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
@@ -104,10 +93,10 @@ func (s *sum[N]) delta(dest *metricdata.Aggregation) int {
 		dPts[i].Time = t
 		dPts[i].Value = val.n
 		val.res.Collect(&dPts[i].Exemplars)
-		// Do not report stale values.
-		delete(s.values, attr)
 		i++
 	}
+	// Do not report stale values.
+	clear(s.values)
 	// The delta collection cycle resets.
 	s.start = t
 
@@ -200,11 +189,10 @@ func (s *precomputedSum[N]) delta(dest *metricdata.Aggregation) int {
 		value.res.Collect(&dPts[i].Exemplars)
 
 		newReported[attr] = value.n
-		// Unused attribute sets do not report.
-		delete(s.values, attr)
 		i++
 	}
-	// Unused attribute sets are forgotten.
+	// Unused attribute sets do not report.
+	clear(s.values)
 	s.reported = newReported
 	// The delta collection cycle resets.
 	s.start = t
@@ -238,10 +226,10 @@ func (s *precomputedSum[N]) cumulative(dest *metricdata.Aggregation) int {
 		dPts[i].Value = val.n
 		val.res.Collect(&dPts[i].Exemplars)
 
-		// Unused attribute sets do not report.
-		delete(s.values, attr)
 		i++
 	}
+	// Unused attribute sets do not report.
+	clear(s.values)
 
 	sData.DataPoints = dPts
 	*dest = sData
diff --git a/sdk/metric/internal/aggregate/sum_test.go b/sdk/metric/internal/aggregate/sum_test.go
index b169fcad455..c7bb47e650d 100644
--- a/sdk/metric/internal/aggregate/sum_test.go
+++ b/sdk/metric/internal/aggregate/sum_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
 
diff --git a/sdk/metric/internal/exemplar/doc.go b/sdk/metric/internal/exemplar/doc.go
index 3caeb542c57..5394f48e0df 100644
--- a/sdk/metric/internal/exemplar/doc.go
+++ b/sdk/metric/internal/exemplar/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package exemplar provides an implementation of the OpenTelemetry exemplar
 // reservoir to be used in metric collection pipelines.
diff --git a/sdk/metric/internal/exemplar/drop.go b/sdk/metric/internal/exemplar/drop.go
index 39bf37b9e94..729c2793ee1 100644
--- a/sdk/metric/internal/exemplar/drop.go
+++ b/sdk/metric/internal/exemplar/drop.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 
diff --git a/sdk/metric/internal/exemplar/drop_test.go b/sdk/metric/internal/exemplar/drop_test.go
index 5b02bf09437..eb07e9a10e4 100644
--- a/sdk/metric/internal/exemplar/drop_test.go
+++ b/sdk/metric/internal/exemplar/drop_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar
 
diff --git a/sdk/metric/internal/exemplar/filter.go b/sdk/metric/internal/exemplar/filter.go
index 4f5946fb966..53c86d5cc24 100644
--- a/sdk/metric/internal/exemplar/filter.go
+++ b/sdk/metric/internal/exemplar/filter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 
diff --git a/sdk/metric/internal/exemplar/filter_test.go b/sdk/metric/internal/exemplar/filter_test.go
index e32d03c2352..b52f5b79049 100644
--- a/sdk/metric/internal/exemplar/filter_test.go
+++ b/sdk/metric/internal/exemplar/filter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 
diff --git a/sdk/metric/internal/exemplar/hist.go b/sdk/metric/internal/exemplar/hist.go
index 6f4fe5524b1..463c8a7d313 100644
--- a/sdk/metric/internal/exemplar/hist.go
+++ b/sdk/metric/internal/exemplar/hist.go
@@ -1,21 +1,11 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 
 import (
 	"context"
+	"slices"
 	"sort"
 	"time"
 
@@ -28,7 +18,7 @@ import (
 //
 // The passed bounds will be sorted by this function.
 func Histogram[N int64 | float64](bounds []float64) Reservoir[N] {
-	sort.Float64s(bounds)
+	slices.Sort(bounds)
 	return &histRes[N]{
 		bounds:  bounds,
 		storage: newStorage[N](len(bounds) + 1),
diff --git a/sdk/metric/internal/exemplar/hist_test.go b/sdk/metric/internal/exemplar/hist_test.go
index c85694db78c..b22d6c22a01 100644
--- a/sdk/metric/internal/exemplar/hist_test.go
+++ b/sdk/metric/internal/exemplar/hist_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar
 
diff --git a/sdk/metric/internal/exemplar/rand.go b/sdk/metric/internal/exemplar/rand.go
index 7f9fda5b489..923953cb75b 100644
--- a/sdk/metric/internal/exemplar/rand.go
+++ b/sdk/metric/internal/exemplar/rand.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 
diff --git a/sdk/metric/internal/exemplar/rand_test.go b/sdk/metric/internal/exemplar/rand_test.go
index 9de7a7058ac..5b6fd426fb4 100644
--- a/sdk/metric/internal/exemplar/rand_test.go
+++ b/sdk/metric/internal/exemplar/rand_test.go
@@ -1,23 +1,12 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar
 
 import (
 	"context"
 	"math"
-	"sort"
+	"slices"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -43,7 +32,7 @@ func TestFixedSizeSamplingCorrectness(t *testing.T) {
 		data[i] = (-1.0 / intensity) * math.Log(random())
 	}
 	// Sort to test position bias.
-	sort.Float64s(data)
+	slices.Sort(data)
 
 	r := FixedSize[float64](sampleSize)
 	for _, value := range data {
diff --git a/sdk/metric/internal/exemplar/reservoir.go b/sdk/metric/internal/exemplar/reservoir.go
index 7d5276a3411..a663aa22970 100644
--- a/sdk/metric/internal/exemplar/reservoir.go
+++ b/sdk/metric/internal/exemplar/reservoir.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 
diff --git a/sdk/metric/internal/exemplar/reservoir_test.go b/sdk/metric/internal/exemplar/reservoir_test.go
index 8eafe178647..f2cdfb0f542 100644
--- a/sdk/metric/internal/exemplar/reservoir_test.go
+++ b/sdk/metric/internal/exemplar/reservoir_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar
 
diff --git a/sdk/metric/internal/exemplar/storage.go b/sdk/metric/internal/exemplar/storage.go
index e2c2b90a351..994ab10736b 100644
--- a/sdk/metric/internal/exemplar/storage.go
+++ b/sdk/metric/internal/exemplar/storage.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
 
diff --git a/sdk/metric/internal/reuse_slice.go b/sdk/metric/internal/reuse_slice.go
index 9695492b0d1..19ec6806ff7 100644
--- a/sdk/metric/internal/reuse_slice.go
+++ b/sdk/metric/internal/reuse_slice.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/sdk/metric/internal"
 
diff --git a/sdk/metric/internal/x/x.go b/sdk/metric/internal/x/x.go
index 541160f9423..8cd2f37417b 100644
--- a/sdk/metric/internal/x/x.go
+++ b/sdk/metric/internal/x/x.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package x contains support for OTel metric SDK experimental features.
 //
diff --git a/sdk/metric/internal/x/x_test.go b/sdk/metric/internal/x/x_test.go
index b643fe265ff..7a5dd15965d 100644
--- a/sdk/metric/internal/x/x_test.go
+++ b/sdk/metric/internal/x/x_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package x
 
diff --git a/sdk/metric/manual_reader.go b/sdk/metric/manual_reader.go
index 7d524de9ea1..e0fd86ca78d 100644
--- a/sdk/metric/manual_reader.go
+++ b/sdk/metric/manual_reader.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/manual_reader_test.go b/sdk/metric/manual_reader_test.go
index a2a1476fa83..9583d0396e9 100644
--- a/sdk/metric/manual_reader_test.go
+++ b/sdk/metric/manual_reader_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/meter.go b/sdk/metric/meter.go
index beb7876ec40..7840c48647a 100644
--- a/sdk/metric/meter.go
+++ b/sdk/metric/meter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/meter_test.go b/sdk/metric/meter_test.go
index 080c7e00b33..dfe2d6f8366 100644
--- a/sdk/metric/meter_test.go
+++ b/sdk/metric/meter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric
 
diff --git a/sdk/metric/metricdata/data.go b/sdk/metric/metricdata/data.go
index 32c17934fc4..d32cfc67d92 100644
--- a/sdk/metric/metricdata/data.go
+++ b/sdk/metric/metricdata/data.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metricdata // import "go.opentelemetry.io/otel/sdk/metric/metricdata"
 
diff --git a/sdk/metric/metricdata/metricdatatest/assertion.go b/sdk/metric/metricdata/metricdatatest/assertion.go
index a65fd99f482..d140d1f4057 100644
--- a/sdk/metric/metricdata/metricdatatest/assertion.go
+++ b/sdk/metric/metricdata/metricdatatest/assertion.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package metricdatatest provides testing functionality for use with the
 // metricdata package.
diff --git a/sdk/metric/metricdata/metricdatatest/assertion_fail_test.go b/sdk/metric/metricdata/metricdatatest/assertion_fail_test.go
index 61e41d72901..3a789b6897c 100644
--- a/sdk/metric/metricdata/metricdatatest/assertion_fail_test.go
+++ b/sdk/metric/metricdata/metricdatatest/assertion_fail_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build tests_fail
 // +build tests_fail
diff --git a/sdk/metric/metricdata/metricdatatest/assertion_test.go b/sdk/metric/metricdata/metricdatatest/assertion_test.go
index 4219375c4ba..d32512a806f 100644
--- a/sdk/metric/metricdata/metricdatatest/assertion_test.go
+++ b/sdk/metric/metricdata/metricdatatest/assertion_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metricdatatest // import "go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest"
 
diff --git a/sdk/metric/metricdata/metricdatatest/comparisons.go b/sdk/metric/metricdata/metricdatatest/comparisons.go
index a25c930676f..75daa8171de 100644
--- a/sdk/metric/metricdata/metricdatatest/comparisons.go
+++ b/sdk/metric/metricdata/metricdatatest/comparisons.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metricdatatest // import "go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest"
 
@@ -18,6 +7,7 @@ import (
 	"bytes"
 	"fmt"
 	"reflect"
+	"slices"
 
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/sdk/metric/metricdata"
@@ -302,10 +292,10 @@ func equalHistogramDataPoints[N int64 | float64](a, b metricdata.HistogramDataPo
 		if a.Count != b.Count {
 			reasons = append(reasons, notEqualStr("Count", a.Count, b.Count))
 		}
-		if !equalSlices(a.Bounds, b.Bounds) {
+		if !slices.Equal(a.Bounds, b.Bounds) {
 			reasons = append(reasons, notEqualStr("Bounds", a.Bounds, b.Bounds))
 		}
-		if !equalSlices(a.BucketCounts, b.BucketCounts) {
+		if !slices.Equal(a.BucketCounts, b.BucketCounts) {
 			reasons = append(reasons, notEqualStr("BucketCounts", a.BucketCounts, b.BucketCounts))
 		}
 		if !eqExtrema(a.Min, b.Min) {
@@ -426,7 +416,7 @@ func equalExponentialBuckets(a, b metricdata.ExponentialBucket, _ config) (reaso
 	if a.Offset != b.Offset {
 		reasons = append(reasons, notEqualStr("Offset", a.Offset, b.Offset))
 	}
-	if !equalSlices(a.Counts, b.Counts) {
+	if !slices.Equal(a.Counts, b.Counts) {
 		reasons = append(reasons, notEqualStr("Counts", a.Counts, b.Counts))
 	}
 	return reasons
@@ -499,18 +489,6 @@ func notEqualStr(prefix string, expected, actual interface{}) string {
 	return fmt.Sprintf("%s not equal:\nexpected: %v\nactual: %v", prefix, expected, actual)
 }
 
-func equalSlices[T comparable](a, b []T) bool {
-	if len(a) != len(b) {
-		return false
-	}
-	for i, v := range a {
-		if v != b[i] {
-			return false
-		}
-	}
-	return true
-}
-
 func equalExtrema[N int64 | float64](a, b metricdata.Extrema[N], _ config) (reasons []string) {
 	if !eqExtrema(a, b) {
 		reasons = append(reasons, notEqualStr("Extrema", a, b))
@@ -528,63 +506,56 @@ func eqExtrema[N int64 | float64](a, b metricdata.Extrema[N]) bool {
 	return aV == bV
 }
 
-func equalKeyValue(a, b []attribute.KeyValue) bool {
-	// Comparison of []attribute.KeyValue as a comparable requires Go >= 1.20.
-	// To support Go < 1.20 use this function instead.
-	if len(a) != len(b) {
+func equalKeyValue(a, b attribute.KeyValue) bool {
+	if a.Key != b.Key {
+		return false
+	}
+	if a.Value.Type() != b.Value.Type() {
 		return false
 	}
-	for i, v := range a {
-		if v.Key != b[i].Key {
+	switch a.Value.Type() {
+	case attribute.BOOL:
+		if a.Value.AsBool() != b.Value.AsBool() {
 			return false
 		}
-		if v.Value.Type() != b[i].Value.Type() {
+	case attribute.INT64:
+		if a.Value.AsInt64() != b.Value.AsInt64() {
 			return false
 		}
-		switch v.Value.Type() {
-		case attribute.BOOL:
-			if v.Value.AsBool() != b[i].Value.AsBool() {
-				return false
-			}
-		case attribute.INT64:
-			if v.Value.AsInt64() != b[i].Value.AsInt64() {
-				return false
-			}
-		case attribute.FLOAT64:
-			if v.Value.AsFloat64() != b[i].Value.AsFloat64() {
-				return false
-			}
-		case attribute.STRING:
-			if v.Value.AsString() != b[i].Value.AsString() {
-				return false
-			}
-		case attribute.BOOLSLICE:
-			if ok := equalSlices(v.Value.AsBoolSlice(), b[i].Value.AsBoolSlice()); !ok {
-				return false
-			}
-		case attribute.INT64SLICE:
-			if ok := equalSlices(v.Value.AsInt64Slice(), b[i].Value.AsInt64Slice()); !ok {
-				return false
-			}
-		case attribute.FLOAT64SLICE:
-			if ok := equalSlices(v.Value.AsFloat64Slice(), b[i].Value.AsFloat64Slice()); !ok {
-				return false
-			}
-		case attribute.STRINGSLICE:
-			if ok := equalSlices(v.Value.AsStringSlice(), b[i].Value.AsStringSlice()); !ok {
-				return false
-			}
-		default:
-			// We control all types passed to this, panic to signal developers
-			// early they changed things in an incompatible way.
-			panic(fmt.Sprintf("unknown attribute value type: %s", v.Value.Type()))
+	case attribute.FLOAT64:
+		if a.Value.AsFloat64() != b.Value.AsFloat64() {
+			return false
+		}
+	case attribute.STRING:
+		if a.Value.AsString() != b.Value.AsString() {
+			return false
+		}
+	case attribute.BOOLSLICE:
+		if ok := slices.Equal(a.Value.AsBoolSlice(), b.Value.AsBoolSlice()); !ok {
+			return false
+		}
+	case attribute.INT64SLICE:
+		if ok := slices.Equal(a.Value.AsInt64Slice(), b.Value.AsInt64Slice()); !ok {
+			return false
+		}
+	case attribute.FLOAT64SLICE:
+		if ok := slices.Equal(a.Value.AsFloat64Slice(), b.Value.AsFloat64Slice()); !ok {
+			return false
+		}
+	case attribute.STRINGSLICE:
+		if ok := slices.Equal(a.Value.AsStringSlice(), b.Value.AsStringSlice()); !ok {
+			return false
 		}
+	default:
+		// We control all types passed to this, panic to signal developers
+		// early they changed things in an incompatible way.
+		panic(fmt.Sprintf("unknown attribute value type: %s", a.Value.Type()))
 	}
 	return true
 }
 
 func equalExemplars[N int64 | float64](a, b metricdata.Exemplar[N], cfg config) (reasons []string) {
-	if !equalKeyValue(a.FilteredAttributes, b.FilteredAttributes) {
+	if !slices.EqualFunc(a.FilteredAttributes, b.FilteredAttributes, equalKeyValue) {
 		reasons = append(reasons, notEqualStr("FilteredAttributes", a.FilteredAttributes, b.FilteredAttributes))
 	}
 	if !cfg.ignoreTimestamp {
@@ -597,10 +568,10 @@ func equalExemplars[N int64 | float64](a, b metricdata.Exemplar[N], cfg config)
 			reasons = append(reasons, notEqualStr("Value", a.Value, b.Value))
 		}
 	}
-	if !equalSlices(a.SpanID, b.SpanID) {
+	if !slices.Equal(a.SpanID, b.SpanID) {
 		reasons = append(reasons, notEqualStr("SpanID", a.SpanID, b.SpanID))
 	}
-	if !equalSlices(a.TraceID, b.TraceID) {
+	if !slices.Equal(a.TraceID, b.TraceID) {
 		reasons = append(reasons, notEqualStr("TraceID", a.TraceID, b.TraceID))
 	}
 	return reasons
diff --git a/sdk/metric/metricdata/temporality.go b/sdk/metric/metricdata/temporality.go
index 9fceb18cba7..187713dadf7 100644
--- a/sdk/metric/metricdata/temporality.go
+++ b/sdk/metric/metricdata/temporality.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:generate stringer -type=Temporality
 
diff --git a/sdk/metric/periodic_reader.go b/sdk/metric/periodic_reader.go
index ff86999c759..9cdd9384c51 100644
--- a/sdk/metric/periodic_reader.go
+++ b/sdk/metric/periodic_reader.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/periodic_reader_test.go b/sdk/metric/periodic_reader_test.go
index a5ac94fe367..b22e51222df 100644
--- a/sdk/metric/periodic_reader_test.go
+++ b/sdk/metric/periodic_reader_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/pipeline.go b/sdk/metric/pipeline.go
index da39ab961c1..c3e2d9cc012 100644
--- a/sdk/metric/pipeline.go
+++ b/sdk/metric/pipeline.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/pipeline_registry_test.go b/sdk/metric/pipeline_registry_test.go
index fe01d6971b3..0311e28cc35 100644
--- a/sdk/metric/pipeline_registry_test.go
+++ b/sdk/metric/pipeline_registry_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/pipeline_test.go b/sdk/metric/pipeline_test.go
index d52b9a7fa2c..a5995b626a6 100644
--- a/sdk/metric/pipeline_test.go
+++ b/sdk/metric/pipeline_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/provider.go b/sdk/metric/provider.go
index 7d1a9183ce1..a82af538e67 100644
--- a/sdk/metric/provider.go
+++ b/sdk/metric/provider.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/provider_test.go b/sdk/metric/provider_test.go
index ba0b1ac769f..138bac57a22 100644
--- a/sdk/metric/provider_test.go
+++ b/sdk/metric/provider_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//	http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric
 
diff --git a/sdk/metric/reader.go b/sdk/metric/reader.go
index 65cedaf3c07..9f900130043 100644
--- a/sdk/metric/reader.go
+++ b/sdk/metric/reader.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/reader_test.go b/sdk/metric/reader_test.go
index 48d36155ec6..04a51693890 100644
--- a/sdk/metric/reader_test.go
+++ b/sdk/metric/reader_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/version.go b/sdk/metric/version.go
index 310fa5a5309..2c0e4d12d1e 100644
--- a/sdk/metric/version.go
+++ b/sdk/metric/version.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/version_test.go b/sdk/metric/version_test.go
index 34e00201e32..f5d49359136 100644
--- a/sdk/metric/version_test.go
+++ b/sdk/metric/version_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric
 
diff --git a/sdk/metric/view.go b/sdk/metric/view.go
index 65f243befed..11e334319d0 100644
--- a/sdk/metric/view.go
+++ b/sdk/metric/view.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/metric/view_test.go b/sdk/metric/view_test.go
index 0cf5646f243..c952560fc45 100644
--- a/sdk/metric/view_test.go
+++ b/sdk/metric/view_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/sdk/metric"
 
diff --git a/sdk/resource/auto.go b/sdk/resource/auto.go
index aed756c5e70..95a61d61d49 100644
--- a/sdk/resource/auto.go
+++ b/sdk/resource/auto.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/auto_test.go b/sdk/resource/auto_test.go
index fac62f3a344..d1962ed67b9 100644
--- a/sdk/resource/auto_test.go
+++ b/sdk/resource/auto_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/benchmark_test.go b/sdk/resource/benchmark_test.go
index c43e7a6b8be..6f1e6afe1ff 100644
--- a/sdk/resource/benchmark_test.go
+++ b/sdk/resource/benchmark_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/builtin.go b/sdk/resource/builtin.go
index 6a2c08293a8..488cabc439a 100644
--- a/sdk/resource/builtin.go
+++ b/sdk/resource/builtin.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/builtin_test.go b/sdk/resource/builtin_test.go
index 20a4e350a93..dd5534054ee 100644
--- a/sdk/resource/builtin_test.go
+++ b/sdk/resource/builtin_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/config.go b/sdk/resource/config.go
index f263919f6ec..0d6e213d924 100644
--- a/sdk/resource/config.go
+++ b/sdk/resource/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/container.go b/sdk/resource/container.go
index c1b47193fe7..f3eeb45aca3 100644
--- a/sdk/resource/container.go
+++ b/sdk/resource/container.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/container_test.go b/sdk/resource/container_test.go
index e4ec163fb8c..d46f178b372 100644
--- a/sdk/resource/container_test.go
+++ b/sdk/resource/container_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource
 
diff --git a/sdk/resource/doc.go b/sdk/resource/doc.go
index d55a50b0dc2..64939a27131 100644
--- a/sdk/resource/doc.go
+++ b/sdk/resource/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package resource provides detecting and representing resources.
 //
diff --git a/sdk/resource/env.go b/sdk/resource/env.go
index be4cbe423ea..7b221c703f7 100644
--- a/sdk/resource/env.go
+++ b/sdk/resource/env.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/env_test.go b/sdk/resource/env_test.go
index 99ba9a897bf..7516b64b05b 100644
--- a/sdk/resource/env_test.go
+++ b/sdk/resource/env_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource
 
diff --git a/sdk/resource/example_test.go b/sdk/resource/example_test.go
index 4c3ee3067e4..295b0be5ba0 100644
--- a/sdk/resource/example_test.go
+++ b/sdk/resource/example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/export_common_unix_test.go b/sdk/resource/export_common_unix_test.go
index a296ff6f245..a0f27486c89 100644
--- a/sdk/resource/export_common_unix_test.go
+++ b/sdk/resource/export_common_unix_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
diff --git a/sdk/resource/export_os_release_darwin_test.go b/sdk/resource/export_os_release_darwin_test.go
index 36bfb036362..4ed79feed41 100644
--- a/sdk/resource/export_os_release_darwin_test.go
+++ b/sdk/resource/export_os_release_darwin_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/export_test.go b/sdk/resource/export_test.go
index 8003e3ec997..6a570a034ff 100644
--- a/sdk/resource/export_test.go
+++ b/sdk/resource/export_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/export_unix_test.go b/sdk/resource/export_unix_test.go
index af858530ebf..b836d018b8d 100644
--- a/sdk/resource/export_unix_test.go
+++ b/sdk/resource/export_unix_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build aix || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
 // +build aix dragonfly freebsd linux netbsd openbsd solaris zos
diff --git a/sdk/resource/export_windows_test.go b/sdk/resource/export_windows_test.go
index 07a8ffaaf5c..1fc1c1071e1 100644
--- a/sdk/resource/export_windows_test.go
+++ b/sdk/resource/export_windows_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/host_id.go b/sdk/resource/host_id.go
index f579329c2c6..5acbec23d92 100644
--- a/sdk/resource/host_id.go
+++ b/sdk/resource/host_id.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//	http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/host_id_bsd.go b/sdk/resource/host_id_bsd.go
index 1778bbacf05..cc8b8938ed5 100644
--- a/sdk/resource/host_id_bsd.go
+++ b/sdk/resource/host_id_bsd.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build dragonfly || freebsd || netbsd || openbsd || solaris
 // +build dragonfly freebsd netbsd openbsd solaris
diff --git a/sdk/resource/host_id_darwin.go b/sdk/resource/host_id_darwin.go
index ba41409b23c..b09fde3b735 100644
--- a/sdk/resource/host_id_darwin.go
+++ b/sdk/resource/host_id_darwin.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/host_id_exec.go b/sdk/resource/host_id_exec.go
index 207acb0ed3a..d9e5d1a8fff 100644
--- a/sdk/resource/host_id_exec.go
+++ b/sdk/resource/host_id_exec.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build darwin || dragonfly || freebsd || netbsd || openbsd || solaris
 
diff --git a/sdk/resource/host_id_export_test.go b/sdk/resource/host_id_export_test.go
index e74d9a35d8b..bf7a97cf407 100644
--- a/sdk/resource/host_id_export_test.go
+++ b/sdk/resource/host_id_export_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/host_id_linux.go b/sdk/resource/host_id_linux.go
index 410579b8fc9..f84f173240f 100644
--- a/sdk/resource/host_id_linux.go
+++ b/sdk/resource/host_id_linux.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build linux
 // +build linux
diff --git a/sdk/resource/host_id_readfile.go b/sdk/resource/host_id_readfile.go
index 721e3ca6e7d..6354b356022 100644
--- a/sdk/resource/host_id_readfile.go
+++ b/sdk/resource/host_id_readfile.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build linux || dragonfly || freebsd || netbsd || openbsd || solaris
 
diff --git a/sdk/resource/host_id_readfile_test.go b/sdk/resource/host_id_readfile_test.go
index f071a05cc0c..b78846a144a 100644
--- a/sdk/resource/host_id_readfile_test.go
+++ b/sdk/resource/host_id_readfile_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build linux || dragonfly || freebsd || netbsd || openbsd || solaris
 
diff --git a/sdk/resource/host_id_test.go b/sdk/resource/host_id_test.go
index b20c2663714..1a5e0f49f6d 100644
--- a/sdk/resource/host_id_test.go
+++ b/sdk/resource/host_id_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource
 
diff --git a/sdk/resource/host_id_unsupported.go b/sdk/resource/host_id_unsupported.go
index 89df9d6882e..df12c44c564 100644
--- a/sdk/resource/host_id_unsupported.go
+++ b/sdk/resource/host_id_unsupported.go
@@ -1,25 +1,8 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
-// +build !darwin
-// +build !dragonfly
-// +build !freebsd
-// +build !linux
-// +build !netbsd
-// +build !openbsd
-// +build !solaris
-// +build !windows
+//go:build !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !solaris && !windows
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/host_id_windows.go b/sdk/resource/host_id_windows.go
index 5b431c6ee6e..71386e2da4c 100644
--- a/sdk/resource/host_id_windows.go
+++ b/sdk/resource/host_id_windows.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build windows
 // +build windows
diff --git a/sdk/resource/host_id_windows_test.go b/sdk/resource/host_id_windows_test.go
index 656b005c6af..52f17e03aa2 100644
--- a/sdk/resource/host_id_windows_test.go
+++ b/sdk/resource/host_id_windows_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build windows
 // +build windows
diff --git a/sdk/resource/os.go b/sdk/resource/os.go
index 8fbf071c178..cf0165a645b 100644
--- a/sdk/resource/os.go
+++ b/sdk/resource/os.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/os_release_darwin.go b/sdk/resource/os_release_darwin.go
index 24ec85793de..ce455dc544b 100644
--- a/sdk/resource/os_release_darwin.go
+++ b/sdk/resource/os_release_darwin.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/os_release_darwin_test.go b/sdk/resource/os_release_darwin_test.go
index a0f52b6eac3..12179632f5a 100644
--- a/sdk/resource/os_release_darwin_test.go
+++ b/sdk/resource/os_release_darwin_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/os_release_unix.go b/sdk/resource/os_release_unix.go
index c771942deec..f537e5ca5c4 100644
--- a/sdk/resource/os_release_unix.go
+++ b/sdk/resource/os_release_unix.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build aix || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
 // +build aix dragonfly freebsd linux netbsd openbsd solaris zos
diff --git a/sdk/resource/os_release_unix_test.go b/sdk/resource/os_release_unix_test.go
index 470f1273ad3..e7a06d721d4 100644
--- a/sdk/resource/os_release_unix_test.go
+++ b/sdk/resource/os_release_unix_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build aix || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
 // +build aix dragonfly freebsd linux netbsd openbsd solaris zos
diff --git a/sdk/resource/os_test.go b/sdk/resource/os_test.go
index bb11545ff25..44c8705bcb7 100644
--- a/sdk/resource/os_test.go
+++ b/sdk/resource/os_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/os_unix.go b/sdk/resource/os_unix.go
index 1c84afc1852..a6ff26a4d27 100644
--- a/sdk/resource/os_unix.go
+++ b/sdk/resource/os_unix.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
diff --git a/sdk/resource/os_unix_test.go b/sdk/resource/os_unix_test.go
index 6c560e454e1..0ede0520c8a 100644
--- a/sdk/resource/os_unix_test.go
+++ b/sdk/resource/os_unix_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
diff --git a/sdk/resource/os_unsupported.go b/sdk/resource/os_unsupported.go
index 3ebcb534f28..a77742b0771 100644
--- a/sdk/resource/os_unsupported.go
+++ b/sdk/resource/os_unsupported.go
@@ -1,27 +1,8 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
-// +build !aix
-// +build !darwin
-// +build !dragonfly
-// +build !freebsd
-// +build !linux
-// +build !netbsd
-// +build !openbsd
-// +build !solaris
-// +build !windows
-// +build !zos
+//go:build !aix && !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !solaris && !windows && !zos
+// +build !aix,!darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows,!zos
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/os_windows.go b/sdk/resource/os_windows.go
index faad64d8daa..5e3d199d785 100644
--- a/sdk/resource/os_windows.go
+++ b/sdk/resource/os_windows.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/os_windows_test.go b/sdk/resource/os_windows_test.go
index 5deb28f2c60..ce081d7a29a 100644
--- a/sdk/resource/os_windows_test.go
+++ b/sdk/resource/os_windows_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/process.go b/sdk/resource/process.go
index 739ea4512ac..8ba4e9a45cd 100644
--- a/sdk/resource/process.go
+++ b/sdk/resource/process.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/process_test.go b/sdk/resource/process_test.go
index 7ddb66acdd4..16acc2e948e 100644
--- a/sdk/resource/process_test.go
+++ b/sdk/resource/process_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/resource/resource.go b/sdk/resource/resource.go
index cb1ee0a9ceb..9f1af3a236d 100644
--- a/sdk/resource/resource.go
+++ b/sdk/resource/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource // import "go.opentelemetry.io/otel/sdk/resource"
 
diff --git a/sdk/resource/resource_test.go b/sdk/resource/resource_test.go
index de5cd9a7c2a..8bf3fa1ac6b 100644
--- a/sdk/resource/resource_test.go
+++ b/sdk/resource/resource_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package resource_test
 
diff --git a/sdk/trace/batch_span_processor.go b/sdk/trace/batch_span_processor.go
index fca26f2e70e..8a89fffdb4a 100644
--- a/sdk/trace/batch_span_processor.go
+++ b/sdk/trace/batch_span_processor.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/batch_span_processor_test.go b/sdk/trace/batch_span_processor_test.go
index 8fded5527fe..d34643d0851 100644
--- a/sdk/trace/batch_span_processor_test.go
+++ b/sdk/trace/batch_span_processor_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace_test
 
@@ -26,6 +15,7 @@ import (
 
 	ottest "go.opentelemetry.io/otel/sdk/internal/internaltest"
 
+	"github.com/go-logr/logr"
 	"github.com/go-logr/logr/funcr"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -658,6 +648,9 @@ func BenchmarkSpanProcessor(b *testing.B) {
 }
 
 func BenchmarkSpanProcessorVerboseLogging(b *testing.B) {
+	b.Cleanup(func(l logr.Logger) func() {
+		return func() { global.SetLogger(l) }
+	}(global.GetLogger()))
 	global.SetLogger(funcr.New(func(prefix, args string) {}, funcr.Options{Verbosity: 5}))
 	tp := sdktrace.NewTracerProvider(
 		sdktrace.WithBatcher(
diff --git a/sdk/trace/benchmark_test.go b/sdk/trace/benchmark_test.go
index e0172fd1d8c..d51d6bf8a53 100644
--- a/sdk/trace/benchmark_test.go
+++ b/sdk/trace/benchmark_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace_test
 
diff --git a/sdk/trace/doc.go b/sdk/trace/doc.go
index 0285e99be07..1f60524e3ee 100644
--- a/sdk/trace/doc.go
+++ b/sdk/trace/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package trace contains support for OpenTelemetry distributed tracing.
diff --git a/sdk/trace/event.go b/sdk/trace/event.go
index 1e3b426757d..60a7ed1349b 100644
--- a/sdk/trace/event.go
+++ b/sdk/trace/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/evictedqueue.go b/sdk/trace/evictedqueue.go
index d1c86e59b22..69eb2fdfce3 100644
--- a/sdk/trace/evictedqueue.go
+++ b/sdk/trace/evictedqueue.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/evictedqueue_test.go b/sdk/trace/evictedqueue_test.go
index d6bb2797338..d52dd1291bb 100644
--- a/sdk/trace/evictedqueue_test.go
+++ b/sdk/trace/evictedqueue_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/id_generator.go b/sdk/trace/id_generator.go
index bba246041a4..f9633d8c576 100644
--- a/sdk/trace/id_generator.go
+++ b/sdk/trace/id_generator.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/id_generator_test.go b/sdk/trace/id_generator_test.go
index ddb0d062112..29fe1edf7ac 100644
--- a/sdk/trace/id_generator_test.go
+++ b/sdk/trace/id_generator_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/link.go b/sdk/trace/link.go
index 19cfea4ba45..c03bdc90f68 100644
--- a/sdk/trace/link.go
+++ b/sdk/trace/link.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/provider.go b/sdk/trace/provider.go
index b1ac608464a..dec237ca731 100644
--- a/sdk/trace/provider.go
+++ b/sdk/trace/provider.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/provider_test.go b/sdk/trace/provider_test.go
index 4b8629559cc..0c6e2f7dc88 100644
--- a/sdk/trace/provider_test.go
+++ b/sdk/trace/provider_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/sampler_env.go b/sdk/trace/sampler_env.go
index 02053b318ae..d2d1f72466b 100644
--- a/sdk/trace/sampler_env.go
+++ b/sdk/trace/sampler_env.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/sampling.go b/sdk/trace/sampling.go
index a7bc125b9e8..ebb6df6c908 100644
--- a/sdk/trace/sampling.go
+++ b/sdk/trace/sampling.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/sampling_test.go b/sdk/trace/sampling_test.go
index 6ba778db5fa..7480d5ef812 100644
--- a/sdk/trace/sampling_test.go
+++ b/sdk/trace/sampling_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/simple_span_processor.go b/sdk/trace/simple_span_processor.go
index f8770fff79b..c5bf8ed84f7 100644
--- a/sdk/trace/simple_span_processor.go
+++ b/sdk/trace/simple_span_processor.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/simple_span_processor_test.go b/sdk/trace/simple_span_processor_test.go
index 38a44e08fb2..029174a460e 100644
--- a/sdk/trace/simple_span_processor_test.go
+++ b/sdk/trace/simple_span_processor_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace_test
 
diff --git a/sdk/trace/snapshot.go b/sdk/trace/snapshot.go
index 0349b2f198e..32f862790c7 100644
--- a/sdk/trace/snapshot.go
+++ b/sdk/trace/snapshot.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/span.go b/sdk/trace/span.go
index 85bc702a019..7a1ff3a2ea5 100644
--- a/sdk/trace/span.go
+++ b/sdk/trace/span.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
@@ -20,6 +9,7 @@ import (
 	"reflect"
 	"runtime"
 	rt "runtime/trace"
+	"slices"
 	"strings"
 	"sync"
 	"time"
@@ -208,16 +198,6 @@ func (s *recordingSpan) SetStatus(code codes.Code, description string) {
 	s.status = status
 }
 
-// ensureAttributesCapacity inlines functionality from slices.Grow
-// so that we can avoid needing to import golang.org/x/exp for go1.20.
-// Once support for go1.20 is dropped, we can use slices.Grow available since go1.21 instead.
-// Tracking issue: https://github.com/open-telemetry/opentelemetry-go/issues/4819.
-func (s *recordingSpan) ensureAttributesCapacity(minCapacity int) {
-	if n := minCapacity - cap(s.attributes); n > 0 {
-		s.attributes = append(s.attributes[:cap(s.attributes)], make([]attribute.KeyValue, n)...)[:len(s.attributes)]
-	}
-}
-
 // SetAttributes sets attributes of this span.
 //
 // If a key from attributes already exists the value associated with that key
@@ -252,7 +232,7 @@ func (s *recordingSpan) SetAttributes(attributes ...attribute.KeyValue) {
 
 	// Otherwise, add without deduplication. When attributes are read they
 	// will be deduplicated, optimizing the operation.
-	s.ensureAttributesCapacity(len(s.attributes) + len(attributes))
+	s.attributes = slices.Grow(s.attributes, len(s.attributes)+len(attributes))
 	for _, a := range attributes {
 		if !a.Valid() {
 			// Drop all invalid attributes.
@@ -288,12 +268,8 @@ func (s *recordingSpan) addOverCapAttrs(limit int, attrs []attribute.KeyValue) {
 
 	// Now that s.attributes is deduplicated, adding unique attributes up to
 	// the capacity of s will not over allocate s.attributes.
-	if sum := len(attrs) + len(s.attributes); sum < limit {
-		// After support for go1.20 is dropped, simplify if-else to min(sum, limit).
-		s.ensureAttributesCapacity(sum)
-	} else {
-		s.ensureAttributesCapacity(limit)
-	}
+	sum := len(attrs) + len(s.attributes)
+	s.attributes = slices.Grow(s.attributes, min(sum, limit))
 	for _, a := range attrs {
 		if !a.Valid() {
 			// Drop all invalid attributes.
diff --git a/sdk/trace/span_exporter.go b/sdk/trace/span_exporter.go
index c9bd52f7ad4..6bdda3d94a4 100644
--- a/sdk/trace/span_exporter.go
+++ b/sdk/trace/span_exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/span_limits.go b/sdk/trace/span_limits.go
index aa4d4221db3..bec5e209787 100644
--- a/sdk/trace/span_limits.go
+++ b/sdk/trace/span_limits.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/span_limits_test.go b/sdk/trace/span_limits_test.go
index 043215be0d9..9cce50fd668 100644
--- a/sdk/trace/span_limits_test.go
+++ b/sdk/trace/span_limits_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/span_processor.go b/sdk/trace/span_processor.go
index 9c53657a719..af7f9177fc5 100644
--- a/sdk/trace/span_processor.go
+++ b/sdk/trace/span_processor.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/span_processor_annotator_example_test.go b/sdk/trace/span_processor_annotator_example_test.go
index e2842b7a35f..e963afc5c7c 100644
--- a/sdk/trace/span_processor_annotator_example_test.go
+++ b/sdk/trace/span_processor_annotator_example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/span_processor_filter_example_test.go b/sdk/trace/span_processor_filter_example_test.go
index e0ce9e0d86f..56eff66f4c7 100644
--- a/sdk/trace/span_processor_filter_example_test.go
+++ b/sdk/trace/span_processor_filter_example_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/span_processor_test.go b/sdk/trace/span_processor_test.go
index cb8c2e4f522..9c8df1d54f9 100644
--- a/sdk/trace/span_processor_test.go
+++ b/sdk/trace/span_processor_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace_test
 
diff --git a/sdk/trace/span_test.go b/sdk/trace/span_test.go
index 3288b32b087..b387d0a941b 100644
--- a/sdk/trace/span_test.go
+++ b/sdk/trace/span_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/trace_test.go b/sdk/trace/trace_test.go
index feaff2f1974..0918dadcd2a 100644
--- a/sdk/trace/trace_test.go
+++ b/sdk/trace/trace_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/trace/tracer.go b/sdk/trace/tracer.go
index 301e1a7abcc..3e9d7452d4c 100644
--- a/sdk/trace/tracer.go
+++ b/sdk/trace/tracer.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/tracetest/exporter.go b/sdk/trace/tracetest/exporter.go
index 104489e79fd..07117495a8e 100644
--- a/sdk/trace/tracetest/exporter.go
+++ b/sdk/trace/tracetest/exporter.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package tracetest is a testing helper package for the SDK. User can
 // configure no-op or in-memory exporters to verify different SDK behaviors or
diff --git a/sdk/trace/tracetest/exporter_test.go b/sdk/trace/tracetest/exporter_test.go
index e718207f467..bf46c757c96 100644
--- a/sdk/trace/tracetest/exporter_test.go
+++ b/sdk/trace/tracetest/exporter_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetest
 
diff --git a/sdk/trace/tracetest/recorder.go b/sdk/trace/tracetest/recorder.go
index 06673a1c049..7aababbbf2f 100644
--- a/sdk/trace/tracetest/recorder.go
+++ b/sdk/trace/tracetest/recorder.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetest // import "go.opentelemetry.io/otel/sdk/trace/tracetest"
 
diff --git a/sdk/trace/tracetest/recorder_test.go b/sdk/trace/tracetest/recorder_test.go
index de7eead160c..59d447f0629 100644
--- a/sdk/trace/tracetest/recorder_test.go
+++ b/sdk/trace/tracetest/recorder_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetest
 
diff --git a/sdk/trace/tracetest/span.go b/sdk/trace/tracetest/span.go
index ae8eae8e8be..0a641f94889 100644
--- a/sdk/trace/tracetest/span.go
+++ b/sdk/trace/tracetest/span.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package tracetest // import "go.opentelemetry.io/otel/sdk/trace/tracetest"
 
diff --git a/sdk/trace/util_test.go b/sdk/trace/util_test.go
index d921ed69feb..470f635bd8f 100644
--- a/sdk/trace/util_test.go
+++ b/sdk/trace/util_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace_test
 
diff --git a/sdk/trace/version.go b/sdk/trace/version.go
index d3457ed1355..b84dd2c5eef 100644
--- a/sdk/trace/version.go
+++ b/sdk/trace/version.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/sdk/trace"
 
diff --git a/sdk/trace/version_test.go b/sdk/trace/version_test.go
index a973d4b6993..e2a353795ee 100644
--- a/sdk/trace/version_test.go
+++ b/sdk/trace/version_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/sdk/version.go b/sdk/version.go
index 42de0b9a7c6..e1e9bc020ea 100644
--- a/sdk/version.go
+++ b/sdk/version.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package sdk // import "go.opentelemetry.io/otel/sdk"
 
diff --git a/sdk/version_test.go b/sdk/version_test.go
index f1daf13cbd6..d078bcedb91 100644
--- a/sdk/version_test.go
+++ b/sdk/version_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package sdk_test
 
diff --git a/semconv/internal/http.go b/semconv/internal/http.go
index 19c394c69b6..ada857995db 100644
--- a/semconv/internal/http.go
+++ b/semconv/internal/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/semconv/internal"
 
diff --git a/semconv/internal/http_test.go b/semconv/internal/http_test.go
index 3e42f02faf3..98fabffa844 100644
--- a/semconv/internal/http_test.go
+++ b/semconv/internal/http_test.go
@@ -1,15 +1,5 @@
 // Copyright The OpenTelemetry Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/semconv/internal/v2/http.go b/semconv/internal/v2/http.go
index 12d6b520f52..09e094de9ad 100644
--- a/semconv/internal/v2/http.go
+++ b/semconv/internal/v2/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/semconv/internal/v2"
 
diff --git a/semconv/internal/v2/http_test.go b/semconv/internal/v2/http_test.go
index 43a20c5febc..2906dba72e0 100644
--- a/semconv/internal/v2/http_test.go
+++ b/semconv/internal/v2/http_test.go
@@ -1,15 +1,5 @@
 // Copyright The OpenTelemetry Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/semconv/internal/v2/net.go b/semconv/internal/v2/net.go
index 4a711133a02..45a1b06acf2 100644
--- a/semconv/internal/v2/net.go
+++ b/semconv/internal/v2/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/semconv/internal/v2"
 
diff --git a/semconv/internal/v2/net_test.go b/semconv/internal/v2/net_test.go
index e1e32469231..9f71a56d58b 100644
--- a/semconv/internal/v2/net_test.go
+++ b/semconv/internal/v2/net_test.go
@@ -1,15 +1,5 @@
 // Copyright The OpenTelemetry Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/semconv/internal/v3/http.go b/semconv/internal/v3/http.go
index b864c24de27..79b25c7ee95 100644
--- a/semconv/internal/v3/http.go
+++ b/semconv/internal/v3/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/semconv/internal/v3"
 
diff --git a/semconv/internal/v3/http_test.go b/semconv/internal/v3/http_test.go
index 02e7d64f124..1732e9f2b99 100644
--- a/semconv/internal/v3/http_test.go
+++ b/semconv/internal/v3/http_test.go
@@ -1,15 +1,5 @@
 // Copyright The OpenTelemetry Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/semconv/internal/v3/net.go b/semconv/internal/v3/net.go
index d8717954dfd..86e5426057b 100644
--- a/semconv/internal/v3/net.go
+++ b/semconv/internal/v3/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/semconv/internal/v3"
 
diff --git a/semconv/internal/v3/net_test.go b/semconv/internal/v3/net_test.go
index e1e32469231..9f71a56d58b 100644
--- a/semconv/internal/v3/net_test.go
+++ b/semconv/internal/v3/net_test.go
@@ -1,15 +1,5 @@
 // Copyright The OpenTelemetry Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/semconv/internal/v4/http.go b/semconv/internal/v4/http.go
index e09adffffed..aab73ffe135 100644
--- a/semconv/internal/v4/http.go
+++ b/semconv/internal/v4/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/semconv/internal/v4"
 
diff --git a/semconv/internal/v4/http_test.go b/semconv/internal/v4/http_test.go
index e8d83ea3140..85a55680e89 100644
--- a/semconv/internal/v4/http_test.go
+++ b/semconv/internal/v4/http_test.go
@@ -1,15 +1,5 @@
 // Copyright The OpenTelemetry Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/semconv/internal/v4/net.go b/semconv/internal/v4/net.go
index 751b2d74fd2..65db0cb61fc 100644
--- a/semconv/internal/v4/net.go
+++ b/semconv/internal/v4/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal // import "go.opentelemetry.io/otel/semconv/internal/v4"
 
diff --git a/semconv/internal/v4/net_test.go b/semconv/internal/v4/net_test.go
index e1e32469231..9f71a56d58b 100644
--- a/semconv/internal/v4/net_test.go
+++ b/semconv/internal/v4/net_test.go
@@ -1,15 +1,5 @@
 // Copyright The OpenTelemetry Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package internal
 
diff --git a/semconv/template.j2 b/semconv/template.j2
index 984f2f01d85..e3bf128049e 100644
--- a/semconv/template.j2
+++ b/semconv/template.j2
@@ -99,18 +99,7 @@ func {{name}}(val ...bool) attribute.KeyValue {
     {{ text[0]|upper}}{{text[1:] }}
 {%- endmacro -%}
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.10.0/doc.go b/semconv/v1.10.0/doc.go
index 0c5fbdcee95..60e7be59f09 100644
--- a/semconv/v1.10.0/doc.go
+++ b/semconv/v1.10.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.10.0/exception.go b/semconv/v1.10.0/exception.go
index f4fc8c7aa97..3c042d4f998 100644
--- a/semconv/v1.10.0/exception.go
+++ b/semconv/v1.10.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.10.0"
 
diff --git a/semconv/v1.10.0/http.go b/semconv/v1.10.0/http.go
index 6271b1926ad..f0830858685 100644
--- a/semconv/v1.10.0/http.go
+++ b/semconv/v1.10.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.10.0"
 
diff --git a/semconv/v1.10.0/resource.go b/semconv/v1.10.0/resource.go
index 593017eea4a..27c52f4b166 100644
--- a/semconv/v1.10.0/resource.go
+++ b/semconv/v1.10.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.10.0/schema.go b/semconv/v1.10.0/schema.go
index 74f2e1d509f..9eebb78ced5 100644
--- a/semconv/v1.10.0/schema.go
+++ b/semconv/v1.10.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.10.0"
 
diff --git a/semconv/v1.10.0/trace.go b/semconv/v1.10.0/trace.go
index faa3d9c86f3..75f5f3b7995 100644
--- a/semconv/v1.10.0/trace.go
+++ b/semconv/v1.10.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.11.0/doc.go b/semconv/v1.11.0/doc.go
index 050d28599b8..74adbf83390 100644
--- a/semconv/v1.11.0/doc.go
+++ b/semconv/v1.11.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.11.0/exception.go b/semconv/v1.11.0/exception.go
index a13404feab0..7f199d05aa3 100644
--- a/semconv/v1.11.0/exception.go
+++ b/semconv/v1.11.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.11.0"
 
diff --git a/semconv/v1.11.0/http.go b/semconv/v1.11.0/http.go
index 49d26603c40..1e7a7828dee 100644
--- a/semconv/v1.11.0/http.go
+++ b/semconv/v1.11.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.11.0"
 
diff --git a/semconv/v1.11.0/resource.go b/semconv/v1.11.0/resource.go
index a863fdacdf6..92bfd8e4273 100644
--- a/semconv/v1.11.0/resource.go
+++ b/semconv/v1.11.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.11.0/schema.go b/semconv/v1.11.0/schema.go
index 3bb4a929a06..1c661d28be5 100644
--- a/semconv/v1.11.0/schema.go
+++ b/semconv/v1.11.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.11.0"
 
diff --git a/semconv/v1.11.0/trace.go b/semconv/v1.11.0/trace.go
index f99ee377458..a4220f3de00 100644
--- a/semconv/v1.11.0/trace.go
+++ b/semconv/v1.11.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.12.0/doc.go b/semconv/v1.12.0/doc.go
index 181fcc9c520..fc255ef05d9 100644
--- a/semconv/v1.12.0/doc.go
+++ b/semconv/v1.12.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.12.0/exception.go b/semconv/v1.12.0/exception.go
index d6892709437..f0e12957e36 100644
--- a/semconv/v1.12.0/exception.go
+++ b/semconv/v1.12.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.12.0"
 
diff --git a/semconv/v1.12.0/http.go b/semconv/v1.12.0/http.go
index 4b4f3cbaf0b..4e19ca342c6 100644
--- a/semconv/v1.12.0/http.go
+++ b/semconv/v1.12.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.12.0"
 
diff --git a/semconv/v1.12.0/resource.go b/semconv/v1.12.0/resource.go
index b2155676f45..45951685a7e 100644
--- a/semconv/v1.12.0/resource.go
+++ b/semconv/v1.12.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.12.0/schema.go b/semconv/v1.12.0/schema.go
index 2f2a019e43d..f01d515bc23 100644
--- a/semconv/v1.12.0/schema.go
+++ b/semconv/v1.12.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.12.0"
 
diff --git a/semconv/v1.12.0/trace.go b/semconv/v1.12.0/trace.go
index 047d8e95cce..fdae2cb3a56 100644
--- a/semconv/v1.12.0/trace.go
+++ b/semconv/v1.12.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.13.0/doc.go b/semconv/v1.13.0/doc.go
index 0cb2aabc789..869e33637e0 100644
--- a/semconv/v1.13.0/doc.go
+++ b/semconv/v1.13.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.13.0/exception.go b/semconv/v1.13.0/exception.go
index 9d343368d75..12f95eae2cb 100644
--- a/semconv/v1.13.0/exception.go
+++ b/semconv/v1.13.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.13.0"
 
diff --git a/semconv/v1.13.0/http.go b/semconv/v1.13.0/http.go
index dcbc5a59b4d..0f05878ab2a 100644
--- a/semconv/v1.13.0/http.go
+++ b/semconv/v1.13.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.13.0"
 
diff --git a/semconv/v1.13.0/httpconv/http.go b/semconv/v1.13.0/httpconv/http.go
index 3c7e86d61e7..46cb912f97d 100644
--- a/semconv/v1.13.0/httpconv/http.go
+++ b/semconv/v1.13.0/httpconv/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package httpconv provides OpenTelemetry HTTP semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.13.0/netconv/net.go b/semconv/v1.13.0/netconv/net.go
index 4e60e5ab72f..45380bdffab 100644
--- a/semconv/v1.13.0/netconv/net.go
+++ b/semconv/v1.13.0/netconv/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package netconv provides OpenTelemetry network semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.13.0/resource.go b/semconv/v1.13.0/resource.go
index 9a937fe428d..0af0335ed3b 100644
--- a/semconv/v1.13.0/resource.go
+++ b/semconv/v1.13.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.13.0/schema.go b/semconv/v1.13.0/schema.go
index 1f4dfb8c65f..8ca156e901b 100644
--- a/semconv/v1.13.0/schema.go
+++ b/semconv/v1.13.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.13.0"
 
diff --git a/semconv/v1.13.0/trace.go b/semconv/v1.13.0/trace.go
index 7458337627e..0e0f4f86336 100644
--- a/semconv/v1.13.0/trace.go
+++ b/semconv/v1.13.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.14.0/doc.go b/semconv/v1.14.0/doc.go
index d40eea824a8..f159d9aea5c 100644
--- a/semconv/v1.14.0/doc.go
+++ b/semconv/v1.14.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.14.0/exception.go b/semconv/v1.14.0/exception.go
index f18aa28f2d7..cefe80f3e84 100644
--- a/semconv/v1.14.0/exception.go
+++ b/semconv/v1.14.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.14.0"
 
diff --git a/semconv/v1.14.0/http.go b/semconv/v1.14.0/http.go
index 1fef8ffed03..11a494f2bba 100644
--- a/semconv/v1.14.0/http.go
+++ b/semconv/v1.14.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.14.0"
 
diff --git a/semconv/v1.14.0/httpconv/http.go b/semconv/v1.14.0/httpconv/http.go
index 4df87b24171..4b3c70375e6 100644
--- a/semconv/v1.14.0/httpconv/http.go
+++ b/semconv/v1.14.0/httpconv/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package httpconv provides OpenTelemetry HTTP semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.14.0/netconv/net.go b/semconv/v1.14.0/netconv/net.go
index bb16ba5be5b..b3f2bb17d1c 100644
--- a/semconv/v1.14.0/netconv/net.go
+++ b/semconv/v1.14.0/netconv/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package netconv provides OpenTelemetry network semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.14.0/resource.go b/semconv/v1.14.0/resource.go
index 1584d659eee..50dae637d12 100644
--- a/semconv/v1.14.0/resource.go
+++ b/semconv/v1.14.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.14.0/schema.go b/semconv/v1.14.0/schema.go
index afd8d9dd5e3..3fd4d4dec40 100644
--- a/semconv/v1.14.0/schema.go
+++ b/semconv/v1.14.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.14.0"
 
diff --git a/semconv/v1.14.0/trace.go b/semconv/v1.14.0/trace.go
index 60fce279713..6d1dc2b68e0 100644
--- a/semconv/v1.14.0/trace.go
+++ b/semconv/v1.14.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.15.0/doc.go b/semconv/v1.15.0/doc.go
index 93a5d557d2d..8aeeeb8898c 100644
--- a/semconv/v1.15.0/doc.go
+++ b/semconv/v1.15.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.15.0/exception.go b/semconv/v1.15.0/exception.go
index 13c05c37ac7..c375d51dfb1 100644
--- a/semconv/v1.15.0/exception.go
+++ b/semconv/v1.15.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.15.0"
 
diff --git a/semconv/v1.15.0/http.go b/semconv/v1.15.0/http.go
index 919c64aad8d..7604a07207c 100644
--- a/semconv/v1.15.0/http.go
+++ b/semconv/v1.15.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.15.0"
 
diff --git a/semconv/v1.15.0/httpconv/http.go b/semconv/v1.15.0/httpconv/http.go
index 495174ce7d0..524238b4f00 100644
--- a/semconv/v1.15.0/httpconv/http.go
+++ b/semconv/v1.15.0/httpconv/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package httpconv provides OpenTelemetry HTTP semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.15.0/netconv/net.go b/semconv/v1.15.0/netconv/net.go
index 101cd797080..85c26ac8046 100644
--- a/semconv/v1.15.0/netconv/net.go
+++ b/semconv/v1.15.0/netconv/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package netconv provides OpenTelemetry network semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.15.0/resource.go b/semconv/v1.15.0/resource.go
index 399e840ce86..f56b43ef8b7 100644
--- a/semconv/v1.15.0/resource.go
+++ b/semconv/v1.15.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.15.0/schema.go b/semconv/v1.15.0/schema.go
index 57f518567cc..cfe77f53571 100644
--- a/semconv/v1.15.0/schema.go
+++ b/semconv/v1.15.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.15.0"
 
diff --git a/semconv/v1.15.0/trace.go b/semconv/v1.15.0/trace.go
index f40dabffcd9..f4998b85236 100644
--- a/semconv/v1.15.0/trace.go
+++ b/semconv/v1.15.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.16.0/doc.go b/semconv/v1.16.0/doc.go
index 0c17fdd388d..8ca63486af5 100644
--- a/semconv/v1.16.0/doc.go
+++ b/semconv/v1.16.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.16.0/exception.go b/semconv/v1.16.0/exception.go
index b7d598f6bb4..f47c485eb8e 100644
--- a/semconv/v1.16.0/exception.go
+++ b/semconv/v1.16.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.16.0"
 
diff --git a/semconv/v1.16.0/http.go b/semconv/v1.16.0/http.go
index b30fd646027..b7d7f261f79 100644
--- a/semconv/v1.16.0/http.go
+++ b/semconv/v1.16.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.16.0"
 
diff --git a/semconv/v1.16.0/httpconv/http.go b/semconv/v1.16.0/httpconv/http.go
index 6b0ebf2452f..11ad916c58d 100644
--- a/semconv/v1.16.0/httpconv/http.go
+++ b/semconv/v1.16.0/httpconv/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package httpconv provides OpenTelemetry HTTP semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.16.0/netconv/net.go b/semconv/v1.16.0/netconv/net.go
index cfa667e23ab..cd0412ce635 100644
--- a/semconv/v1.16.0/netconv/net.go
+++ b/semconv/v1.16.0/netconv/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package netconv provides OpenTelemetry network semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.16.0/resource.go b/semconv/v1.16.0/resource.go
index 01ed2dafd78..d5e659f314a 100644
--- a/semconv/v1.16.0/resource.go
+++ b/semconv/v1.16.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.16.0/schema.go b/semconv/v1.16.0/schema.go
index ae89b300932..fbcc52df7b4 100644
--- a/semconv/v1.16.0/schema.go
+++ b/semconv/v1.16.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.16.0"
 
diff --git a/semconv/v1.16.0/trace.go b/semconv/v1.16.0/trace.go
index 210e93de0e5..173a47894e5 100644
--- a/semconv/v1.16.0/trace.go
+++ b/semconv/v1.16.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.17.0/doc.go b/semconv/v1.17.0/doc.go
index 71a1f7748d5..e087c9c04d9 100644
--- a/semconv/v1.17.0/doc.go
+++ b/semconv/v1.17.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.17.0/event.go b/semconv/v1.17.0/event.go
index 679c40c4de4..c7b804bbe2e 100644
--- a/semconv/v1.17.0/event.go
+++ b/semconv/v1.17.0/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.17.0/exception.go b/semconv/v1.17.0/exception.go
index 9b8c559de42..137acc67de0 100644
--- a/semconv/v1.17.0/exception.go
+++ b/semconv/v1.17.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.17.0"
 
diff --git a/semconv/v1.17.0/http.go b/semconv/v1.17.0/http.go
index d5c4b5c136a..d318221e59f 100644
--- a/semconv/v1.17.0/http.go
+++ b/semconv/v1.17.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.17.0"
 
diff --git a/semconv/v1.17.0/httpconv/http.go b/semconv/v1.17.0/httpconv/http.go
index fc43808fe44..76d1dc86b42 100644
--- a/semconv/v1.17.0/httpconv/http.go
+++ b/semconv/v1.17.0/httpconv/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package httpconv provides OpenTelemetry HTTP semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.17.0/netconv/net.go b/semconv/v1.17.0/netconv/net.go
index 0a2c1928799..69320020717 100644
--- a/semconv/v1.17.0/netconv/net.go
+++ b/semconv/v1.17.0/netconv/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package netconv provides OpenTelemetry network semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.17.0/resource.go b/semconv/v1.17.0/resource.go
index 39a2eab3a6a..7e365e82ce8 100644
--- a/semconv/v1.17.0/resource.go
+++ b/semconv/v1.17.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.17.0/schema.go b/semconv/v1.17.0/schema.go
index 42fc525d165..634a1dce07a 100644
--- a/semconv/v1.17.0/schema.go
+++ b/semconv/v1.17.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.17.0"
 
diff --git a/semconv/v1.17.0/trace.go b/semconv/v1.17.0/trace.go
index 8c4a7299d27..21497bb6bc6 100644
--- a/semconv/v1.17.0/trace.go
+++ b/semconv/v1.17.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.18.0/doc.go b/semconv/v1.18.0/doc.go
index c04575a99bd..ff55fe79b58 100644
--- a/semconv/v1.18.0/doc.go
+++ b/semconv/v1.18.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.18.0/event.go b/semconv/v1.18.0/event.go
index 69856f47578..60ef182ffcd 100644
--- a/semconv/v1.18.0/event.go
+++ b/semconv/v1.18.0/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.18.0/exception.go b/semconv/v1.18.0/exception.go
index 37d098790b9..d7b2de12475 100644
--- a/semconv/v1.18.0/exception.go
+++ b/semconv/v1.18.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.18.0"
 
diff --git a/semconv/v1.18.0/http.go b/semconv/v1.18.0/http.go
index b55f271f7bc..9c5d10fe556 100644
--- a/semconv/v1.18.0/http.go
+++ b/semconv/v1.18.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.18.0"
 
diff --git a/semconv/v1.18.0/httpconv/http.go b/semconv/v1.18.0/httpconv/http.go
index 9e3bff8197c..df49a7efad0 100644
--- a/semconv/v1.18.0/httpconv/http.go
+++ b/semconv/v1.18.0/httpconv/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package httpconv provides OpenTelemetry HTTP semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.18.0/netconv/net.go b/semconv/v1.18.0/netconv/net.go
index 3ad892deaef..1972bb6c1e7 100644
--- a/semconv/v1.18.0/netconv/net.go
+++ b/semconv/v1.18.0/netconv/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package netconv provides OpenTelemetry network semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.18.0/resource.go b/semconv/v1.18.0/resource.go
index 93834db79f3..5f8c8fd4c5d 100644
--- a/semconv/v1.18.0/resource.go
+++ b/semconv/v1.18.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.18.0/schema.go b/semconv/v1.18.0/schema.go
index d416b1e585f..70ad4d1b6cc 100644
--- a/semconv/v1.18.0/schema.go
+++ b/semconv/v1.18.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.18.0"
 
diff --git a/semconv/v1.18.0/trace.go b/semconv/v1.18.0/trace.go
index e73f3f2d573..03a64d90e42 100644
--- a/semconv/v1.18.0/trace.go
+++ b/semconv/v1.18.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.19.0/attribute_group.go b/semconv/v1.19.0/attribute_group.go
index bb29da303a4..fcaf9cb64f0 100644
--- a/semconv/v1.19.0/attribute_group.go
+++ b/semconv/v1.19.0/attribute_group.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.19.0/doc.go b/semconv/v1.19.0/doc.go
index e30d1c68683..e0b0a808645 100644
--- a/semconv/v1.19.0/doc.go
+++ b/semconv/v1.19.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.19.0/event.go b/semconv/v1.19.0/event.go
index dab9098c000..73af3415b1a 100644
--- a/semconv/v1.19.0/event.go
+++ b/semconv/v1.19.0/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.19.0/exception.go b/semconv/v1.19.0/exception.go
index 119de92651c..7e7d801b0df 100644
--- a/semconv/v1.19.0/exception.go
+++ b/semconv/v1.19.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.19.0"
 
diff --git a/semconv/v1.19.0/http.go b/semconv/v1.19.0/http.go
index e5ae79131cf..a5d8f00c6ed 100644
--- a/semconv/v1.19.0/http.go
+++ b/semconv/v1.19.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.19.0"
 
diff --git a/semconv/v1.19.0/httpconv/http.go b/semconv/v1.19.0/httpconv/http.go
index 5a3578857a3..b7411ff4a27 100644
--- a/semconv/v1.19.0/httpconv/http.go
+++ b/semconv/v1.19.0/httpconv/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package httpconv provides OpenTelemetry HTTP semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.19.0/netconv/net.go b/semconv/v1.19.0/netconv/net.go
index 1f3fddcb193..d4e46a71ac7 100644
--- a/semconv/v1.19.0/netconv/net.go
+++ b/semconv/v1.19.0/netconv/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package netconv provides OpenTelemetry network semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.19.0/resource.go b/semconv/v1.19.0/resource.go
index 5f1cfaf149f..7ff4246cf21 100644
--- a/semconv/v1.19.0/resource.go
+++ b/semconv/v1.19.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.19.0/schema.go b/semconv/v1.19.0/schema.go
index 6043f5bc38b..88e324e0836 100644
--- a/semconv/v1.19.0/schema.go
+++ b/semconv/v1.19.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.19.0"
 
diff --git a/semconv/v1.19.0/trace.go b/semconv/v1.19.0/trace.go
index 5117e60a616..267e8a5ab2e 100644
--- a/semconv/v1.19.0/trace.go
+++ b/semconv/v1.19.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.20.0/attribute_group.go b/semconv/v1.20.0/attribute_group.go
index 67d1d4c44d7..6685c392b50 100644
--- a/semconv/v1.20.0/attribute_group.go
+++ b/semconv/v1.20.0/attribute_group.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.20.0/doc.go b/semconv/v1.20.0/doc.go
index 359c5a69624..0d1f55a8fe9 100644
--- a/semconv/v1.20.0/doc.go
+++ b/semconv/v1.20.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.20.0/event.go b/semconv/v1.20.0/event.go
index 8ac9350d2b2..63776393217 100644
--- a/semconv/v1.20.0/event.go
+++ b/semconv/v1.20.0/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.20.0/exception.go b/semconv/v1.20.0/exception.go
index 09ff4dfdbf7..f40c97825aa 100644
--- a/semconv/v1.20.0/exception.go
+++ b/semconv/v1.20.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.20.0"
 
diff --git a/semconv/v1.20.0/http.go b/semconv/v1.20.0/http.go
index 342aede95f1..9c1840631b6 100644
--- a/semconv/v1.20.0/http.go
+++ b/semconv/v1.20.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.20.0"
 
diff --git a/semconv/v1.20.0/httpconv/http.go b/semconv/v1.20.0/httpconv/http.go
index 9e53e2b5663..8f261a9db01 100644
--- a/semconv/v1.20.0/httpconv/http.go
+++ b/semconv/v1.20.0/httpconv/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package httpconv provides OpenTelemetry HTTP semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.20.0/netconv/net.go b/semconv/v1.20.0/netconv/net.go
index eaacac5b76c..116e9cf6361 100644
--- a/semconv/v1.20.0/netconv/net.go
+++ b/semconv/v1.20.0/netconv/net.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package netconv provides OpenTelemetry network semantic conventions for
 // tracing telemetry.
diff --git a/semconv/v1.20.0/resource.go b/semconv/v1.20.0/resource.go
index a2b906742a8..3d44dae2750 100644
--- a/semconv/v1.20.0/resource.go
+++ b/semconv/v1.20.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.20.0/schema.go b/semconv/v1.20.0/schema.go
index e449e5c3b9f..95d0210e38f 100644
--- a/semconv/v1.20.0/schema.go
+++ b/semconv/v1.20.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.20.0"
 
diff --git a/semconv/v1.20.0/trace.go b/semconv/v1.20.0/trace.go
index 8517741485c..90b1b0452cc 100644
--- a/semconv/v1.20.0/trace.go
+++ b/semconv/v1.20.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.21.0/attribute_group.go b/semconv/v1.21.0/attribute_group.go
index e6cf8951053..a9a15a1dab2 100644
--- a/semconv/v1.21.0/attribute_group.go
+++ b/semconv/v1.21.0/attribute_group.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.21.0/doc.go b/semconv/v1.21.0/doc.go
index 0318b5ec48f..461331a5550 100644
--- a/semconv/v1.21.0/doc.go
+++ b/semconv/v1.21.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.21.0/event.go b/semconv/v1.21.0/event.go
index 30ae34fe478..c09d9317e29 100644
--- a/semconv/v1.21.0/event.go
+++ b/semconv/v1.21.0/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.21.0/exception.go b/semconv/v1.21.0/exception.go
index 93d3c1760c9..5184ee339ab 100644
--- a/semconv/v1.21.0/exception.go
+++ b/semconv/v1.21.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.21.0"
 
diff --git a/semconv/v1.21.0/resource.go b/semconv/v1.21.0/resource.go
index b6d8935cf97..f7aaa50b9e8 100644
--- a/semconv/v1.21.0/resource.go
+++ b/semconv/v1.21.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.21.0/schema.go b/semconv/v1.21.0/schema.go
index 66ffd5989f3..be07217d8a5 100644
--- a/semconv/v1.21.0/schema.go
+++ b/semconv/v1.21.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.21.0"
 
diff --git a/semconv/v1.21.0/trace.go b/semconv/v1.21.0/trace.go
index b5a91450d42..55698cc4471 100644
--- a/semconv/v1.21.0/trace.go
+++ b/semconv/v1.21.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.22.0/attribute_group.go b/semconv/v1.22.0/attribute_group.go
index 88b436e0b27..291f79cf50d 100644
--- a/semconv/v1.22.0/attribute_group.go
+++ b/semconv/v1.22.0/attribute_group.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.22.0/doc.go b/semconv/v1.22.0/doc.go
index 6f91d345dc4..8172cbf5067 100644
--- a/semconv/v1.22.0/doc.go
+++ b/semconv/v1.22.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.22.0/event.go b/semconv/v1.22.0/event.go
index 68d76556fa8..e10f008511e 100644
--- a/semconv/v1.22.0/event.go
+++ b/semconv/v1.22.0/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.22.0/exception.go b/semconv/v1.22.0/exception.go
index 9f1013f0b69..1f754ce268a 100644
--- a/semconv/v1.22.0/exception.go
+++ b/semconv/v1.22.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.22.0"
 
diff --git a/semconv/v1.22.0/resource.go b/semconv/v1.22.0/resource.go
index 65c1ca8c0a3..d5f4a3eb6c5 100644
--- a/semconv/v1.22.0/resource.go
+++ b/semconv/v1.22.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.22.0/schema.go b/semconv/v1.22.0/schema.go
index 4b00ddee9b9..00423e7436e 100644
--- a/semconv/v1.22.0/schema.go
+++ b/semconv/v1.22.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.22.0"
 
diff --git a/semconv/v1.22.0/trace.go b/semconv/v1.22.0/trace.go
index 243227a244b..95857240252 100644
--- a/semconv/v1.22.0/trace.go
+++ b/semconv/v1.22.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.23.0/attribute_group.go b/semconv/v1.23.0/attribute_group.go
index 7225c3bb2cd..34a53a3fe1a 100644
--- a/semconv/v1.23.0/attribute_group.go
+++ b/semconv/v1.23.0/attribute_group.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.23.0/doc.go b/semconv/v1.23.0/doc.go
index ce87d18c6d5..686518f6d35 100644
--- a/semconv/v1.23.0/doc.go
+++ b/semconv/v1.23.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.23.0/event.go b/semconv/v1.23.0/event.go
index 324fbd166fc..464ae33f1ac 100644
--- a/semconv/v1.23.0/event.go
+++ b/semconv/v1.23.0/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.23.0/exception.go b/semconv/v1.23.0/exception.go
index a23c61724e9..9a28d8e502f 100644
--- a/semconv/v1.23.0/exception.go
+++ b/semconv/v1.23.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.23.0"
 
diff --git a/semconv/v1.23.0/resource.go b/semconv/v1.23.0/resource.go
index fdbb4316018..9f10006e946 100644
--- a/semconv/v1.23.0/resource.go
+++ b/semconv/v1.23.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.23.0/schema.go b/semconv/v1.23.0/schema.go
index c951dfb7c70..d597b1e93ee 100644
--- a/semconv/v1.23.0/schema.go
+++ b/semconv/v1.23.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.23.0"
 
diff --git a/semconv/v1.23.0/trace.go b/semconv/v1.23.0/trace.go
index 532303eed71..ba4663e0ff9 100644
--- a/semconv/v1.23.0/trace.go
+++ b/semconv/v1.23.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.23.1/attribute_group.go b/semconv/v1.23.1/attribute_group.go
index c48a5b15fb0..76af0f95144 100644
--- a/semconv/v1.23.1/attribute_group.go
+++ b/semconv/v1.23.1/attribute_group.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.23.1/doc.go b/semconv/v1.23.1/doc.go
index 86df4c38b63..eaf271da1dd 100644
--- a/semconv/v1.23.1/doc.go
+++ b/semconv/v1.23.1/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.23.1/event.go b/semconv/v1.23.1/event.go
index ca4be6eea19..659b77f6371 100644
--- a/semconv/v1.23.1/event.go
+++ b/semconv/v1.23.1/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.23.1/exception.go b/semconv/v1.23.1/exception.go
index 90af73d7fce..aa429c08eea 100644
--- a/semconv/v1.23.1/exception.go
+++ b/semconv/v1.23.1/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.23.1"
 
diff --git a/semconv/v1.23.1/resource.go b/semconv/v1.23.1/resource.go
index 02aa0b8af36..3fdc23eebaa 100644
--- a/semconv/v1.23.1/resource.go
+++ b/semconv/v1.23.1/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.23.1/schema.go b/semconv/v1.23.1/schema.go
index 68cce768edf..ef0e59d47f8 100644
--- a/semconv/v1.23.1/schema.go
+++ b/semconv/v1.23.1/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.23.1"
 
diff --git a/semconv/v1.23.1/trace.go b/semconv/v1.23.1/trace.go
index 87fbde9e975..f22bef358dd 100644
--- a/semconv/v1.23.1/trace.go
+++ b/semconv/v1.23.1/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.24.0/attribute_group.go b/semconv/v1.24.0/attribute_group.go
index 31726598d61..6e688345cbb 100644
--- a/semconv/v1.24.0/attribute_group.go
+++ b/semconv/v1.24.0/attribute_group.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.24.0/doc.go b/semconv/v1.24.0/doc.go
index 9b802db2722..d27e8a8f8b3 100644
--- a/semconv/v1.24.0/doc.go
+++ b/semconv/v1.24.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.24.0/event.go b/semconv/v1.24.0/event.go
index cd3c7162955..6c019aafc3e 100644
--- a/semconv/v1.24.0/event.go
+++ b/semconv/v1.24.0/event.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.24.0/exception.go b/semconv/v1.24.0/exception.go
index ef9bbd37a8c..7235bb51d9a 100644
--- a/semconv/v1.24.0/exception.go
+++ b/semconv/v1.24.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.24.0"
 
diff --git a/semconv/v1.24.0/resource.go b/semconv/v1.24.0/resource.go
index 69eda1959f2..d66bbe9c23d 100644
--- a/semconv/v1.24.0/resource.go
+++ b/semconv/v1.24.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.24.0/schema.go b/semconv/v1.24.0/schema.go
index 9733ce888a0..fe80b1731d0 100644
--- a/semconv/v1.24.0/schema.go
+++ b/semconv/v1.24.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.24.0"
 
diff --git a/semconv/v1.24.0/trace.go b/semconv/v1.24.0/trace.go
index 397174818b7..c1718234e52 100644
--- a/semconv/v1.24.0/trace.go
+++ b/semconv/v1.24.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.4.0/doc.go b/semconv/v1.4.0/doc.go
index c0b1723f8f5..d83a66b9b47 100644
--- a/semconv/v1.4.0/doc.go
+++ b/semconv/v1.4.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.4.0/exception.go b/semconv/v1.4.0/exception.go
index 311cbf218fe..71a2ece3d37 100644
--- a/semconv/v1.4.0/exception.go
+++ b/semconv/v1.4.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.4.0"
 
diff --git a/semconv/v1.4.0/http.go b/semconv/v1.4.0/http.go
index 8d814edc26a..f0c023cafbb 100644
--- a/semconv/v1.4.0/http.go
+++ b/semconv/v1.4.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.4.0"
 
diff --git a/semconv/v1.4.0/resource.go b/semconv/v1.4.0/resource.go
index 404bd4e751d..66c340c1213 100644
--- a/semconv/v1.4.0/resource.go
+++ b/semconv/v1.4.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.4.0/schema.go b/semconv/v1.4.0/schema.go
index a78f1bf4008..b9457bc0b83 100644
--- a/semconv/v1.4.0/schema.go
+++ b/semconv/v1.4.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.4.0"
 
diff --git a/semconv/v1.4.0/trace.go b/semconv/v1.4.0/trace.go
index 805eadc9f54..47fe261aea5 100644
--- a/semconv/v1.4.0/trace.go
+++ b/semconv/v1.4.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.5.0/doc.go b/semconv/v1.5.0/doc.go
index 1fb47264efc..290b1bbb1c3 100644
--- a/semconv/v1.5.0/doc.go
+++ b/semconv/v1.5.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.5.0/exception.go b/semconv/v1.5.0/exception.go
index 86dba03ac6b..30902225174 100644
--- a/semconv/v1.5.0/exception.go
+++ b/semconv/v1.5.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.5.0"
 
diff --git a/semconv/v1.5.0/http.go b/semconv/v1.5.0/http.go
index c2fe83b530a..b7528a341f6 100644
--- a/semconv/v1.5.0/http.go
+++ b/semconv/v1.5.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.5.0"
 
diff --git a/semconv/v1.5.0/resource.go b/semconv/v1.5.0/resource.go
index d43da7c19b4..ac42778c3f7 100644
--- a/semconv/v1.5.0/resource.go
+++ b/semconv/v1.5.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.5.0/schema.go b/semconv/v1.5.0/schema.go
index 6175b00d2dd..1a67a08f3ee 100644
--- a/semconv/v1.5.0/schema.go
+++ b/semconv/v1.5.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.5.0"
 
diff --git a/semconv/v1.5.0/trace.go b/semconv/v1.5.0/trace.go
index cc55669c213..8c0600b9535 100644
--- a/semconv/v1.5.0/trace.go
+++ b/semconv/v1.5.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.6.1/doc.go b/semconv/v1.6.1/doc.go
index afd2842d530..b97b3060474 100644
--- a/semconv/v1.6.1/doc.go
+++ b/semconv/v1.6.1/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.6.1/exception.go b/semconv/v1.6.1/exception.go
index 6e5518c8dca..c1dd6d51f5a 100644
--- a/semconv/v1.6.1/exception.go
+++ b/semconv/v1.6.1/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.6.1"
 
diff --git a/semconv/v1.6.1/http.go b/semconv/v1.6.1/http.go
index 3df9a299783..c312d6b9267 100644
--- a/semconv/v1.6.1/http.go
+++ b/semconv/v1.6.1/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.6.1"
 
diff --git a/semconv/v1.6.1/resource.go b/semconv/v1.6.1/resource.go
index ccd47fdd438..8a378379bb8 100644
--- a/semconv/v1.6.1/resource.go
+++ b/semconv/v1.6.1/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.6.1/schema.go b/semconv/v1.6.1/schema.go
index be540d6df4a..c8900b8c7ed 100644
--- a/semconv/v1.6.1/schema.go
+++ b/semconv/v1.6.1/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.6.1"
 
diff --git a/semconv/v1.6.1/trace.go b/semconv/v1.6.1/trace.go
index 01fc615c49f..1fb3573e14a 100644
--- a/semconv/v1.6.1/trace.go
+++ b/semconv/v1.6.1/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.7.0/doc.go b/semconv/v1.7.0/doc.go
index ba878d1cf6c..2b2a112e0fb 100644
--- a/semconv/v1.7.0/doc.go
+++ b/semconv/v1.7.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.7.0/exception.go b/semconv/v1.7.0/exception.go
index ea37068627a..4e882afedea 100644
--- a/semconv/v1.7.0/exception.go
+++ b/semconv/v1.7.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.7.0"
 
diff --git a/semconv/v1.7.0/http.go b/semconv/v1.7.0/http.go
index 945c95a18ad..c600613341d 100644
--- a/semconv/v1.7.0/http.go
+++ b/semconv/v1.7.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.7.0"
 
diff --git a/semconv/v1.7.0/resource.go b/semconv/v1.7.0/resource.go
index aab6daf3c53..4de14524647 100644
--- a/semconv/v1.7.0/resource.go
+++ b/semconv/v1.7.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.7.0/schema.go b/semconv/v1.7.0/schema.go
index 64b6c46a58d..c21e6ae1af9 100644
--- a/semconv/v1.7.0/schema.go
+++ b/semconv/v1.7.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.7.0"
 
diff --git a/semconv/v1.7.0/trace.go b/semconv/v1.7.0/trace.go
index 9b75bd77aef..da0fdf660b7 100644
--- a/semconv/v1.7.0/trace.go
+++ b/semconv/v1.7.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.8.0/doc.go b/semconv/v1.8.0/doc.go
index 0cf6b7927aa..22dc9f973f0 100644
--- a/semconv/v1.8.0/doc.go
+++ b/semconv/v1.8.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.8.0/exception.go b/semconv/v1.8.0/exception.go
index 40b3ddcacdd..7deef8bd149 100644
--- a/semconv/v1.8.0/exception.go
+++ b/semconv/v1.8.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.8.0"
 
diff --git a/semconv/v1.8.0/http.go b/semconv/v1.8.0/http.go
index fa1f4b69488..0442441c7d2 100644
--- a/semconv/v1.8.0/http.go
+++ b/semconv/v1.8.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.8.0"
 
diff --git a/semconv/v1.8.0/resource.go b/semconv/v1.8.0/resource.go
index d12158bfbf6..55a3293c290 100644
--- a/semconv/v1.8.0/resource.go
+++ b/semconv/v1.8.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.8.0/schema.go b/semconv/v1.8.0/schema.go
index 9586a21047e..a3ba7d8ffb4 100644
--- a/semconv/v1.8.0/schema.go
+++ b/semconv/v1.8.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.8.0"
 
diff --git a/semconv/v1.8.0/trace.go b/semconv/v1.8.0/trace.go
index 154ebbe885b..e6c40347374 100644
--- a/semconv/v1.8.0/trace.go
+++ b/semconv/v1.8.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.9.0/doc.go b/semconv/v1.9.0/doc.go
index 61aed0e14de..3d6a6dc2ee9 100644
--- a/semconv/v1.9.0/doc.go
+++ b/semconv/v1.9.0/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package semconv implements OpenTelemetry semantic conventions.
 //
diff --git a/semconv/v1.9.0/exception.go b/semconv/v1.9.0/exception.go
index 3568e4916f5..97e473ddd81 100644
--- a/semconv/v1.9.0/exception.go
+++ b/semconv/v1.9.0/exception.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.9.0"
 
diff --git a/semconv/v1.9.0/http.go b/semconv/v1.9.0/http.go
index 456e38bd098..a6a65ca89fc 100644
--- a/semconv/v1.9.0/http.go
+++ b/semconv/v1.9.0/http.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.9.0"
 
diff --git a/semconv/v1.9.0/resource.go b/semconv/v1.9.0/resource.go
index 6388f1048f8..210d0e537c9 100644
--- a/semconv/v1.9.0/resource.go
+++ b/semconv/v1.9.0/resource.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/semconv/v1.9.0/schema.go b/semconv/v1.9.0/schema.go
index 67d0e9d3fae..b7b88b48473 100644
--- a/semconv/v1.9.0/schema.go
+++ b/semconv/v1.9.0/schema.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package semconv // import "go.opentelemetry.io/otel/semconv/v1.9.0"
 
diff --git a/semconv/v1.9.0/trace.go b/semconv/v1.9.0/trace.go
index 058f3d69980..0917675d6bb 100644
--- a/semconv/v1.9.0/trace.go
+++ b/semconv/v1.9.0/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Code generated from semantic convention specification. DO NOT EDIT.
 
diff --git a/trace.go b/trace.go
index caf7249de85..6836c65478b 100644
--- a/trace.go
+++ b/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel // import "go.opentelemetry.io/otel"
 
diff --git a/trace/config.go b/trace/config.go
index 3aadc66cf7a..273d58e0014 100644
--- a/trace/config.go
+++ b/trace/config.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/trace"
 
diff --git a/trace/config_test.go b/trace/config_test.go
index b9618e143cf..da341d06eb8 100644
--- a/trace/config_test.go
+++ b/trace/config_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/trace/context.go b/trace/context.go
index 76f9a083c40..5074bb44557 100644
--- a/trace/context.go
+++ b/trace/context.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/trace"
 
diff --git a/trace/context_test.go b/trace/context_test.go
index c7529022991..d9378e1c430 100644
--- a/trace/context_test.go
+++ b/trace/context_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/trace"
 
diff --git a/trace/doc.go b/trace/doc.go
index 440f3d7565a..d661c5d100f 100644
--- a/trace/doc.go
+++ b/trace/doc.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package trace provides an implementation of the tracing part of the
diff --git a/trace/embedded/embedded.go b/trace/embedded/embedded.go
index 898db5a7546..3e359a00bf4 100644
--- a/trace/embedded/embedded.go
+++ b/trace/embedded/embedded.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package embedded provides interfaces embedded within the [OpenTelemetry
 // trace API].
diff --git a/trace/go.mod b/trace/go.mod
index f9a5abcc0ec..76fd2bd0edc 100644
--- a/trace/go.mod
+++ b/trace/go.mod
@@ -1,12 +1,12 @@
 module go.opentelemetry.io/otel/trace
 
-go 1.20
+go 1.21
 
 replace go.opentelemetry.io/otel => ../
 
 require (
 	github.com/google/go-cmp v0.6.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/otel v1.24.0
 )
 
diff --git a/trace/go.sum b/trace/go.sum
index 55961e4a867..6af8d196c71 100644
--- a/trace/go.sum
+++ b/trace/go.sum
@@ -4,8 +4,8 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/trace/nonrecording.go b/trace/nonrecording.go
index 88fcb81611f..c00221e7be9 100644
--- a/trace/nonrecording.go
+++ b/trace/nonrecording.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/trace"
 
diff --git a/trace/noop.go b/trace/noop.go
index c125491caeb..583f109b064 100644
--- a/trace/noop.go
+++ b/trace/noop.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/trace"
 
diff --git a/trace/noop/noop.go b/trace/noop/noop.go
index 7f485543c47..a358993c1ee 100644
--- a/trace/noop/noop.go
+++ b/trace/noop/noop.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package noop provides an implementation of the OpenTelemetry trace API that
 // produces no telemetry and minimizes used computation resources.
diff --git a/trace/noop/noop_test.go b/trace/noop/noop_test.go
index d35c9a4a5ff..c228ad09918 100644
--- a/trace/noop/noop_test.go
+++ b/trace/noop/noop_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package noop // import "go.opentelemetry.io/otel/trace/noop"
 
diff --git a/trace/noop_test.go b/trace/noop_test.go
index e9dcf617b13..7bf709e6de9 100644
--- a/trace/noop_test.go
+++ b/trace/noop_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/trace/trace.go b/trace/trace.go
index 26a4b2260ec..019da4d7861 100644
--- a/trace/trace.go
+++ b/trace/trace.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/trace"
 
diff --git a/trace/trace_test.go b/trace/trace_test.go
index 9bde9d8c79b..73ee3ce49bc 100644
--- a/trace/trace_test.go
+++ b/trace/trace_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/trace/tracestate.go b/trace/tracestate.go
index db936ba5b73..20b5cf24332 100644
--- a/trace/tracestate.go
+++ b/trace/tracestate.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace // import "go.opentelemetry.io/otel/trace"
 
diff --git a/trace/tracestate_benchkmark_test.go b/trace/tracestate_benchkmark_test.go
index 171e09f00f8..9d13fa4306e 100644
--- a/trace/tracestate_benchkmark_test.go
+++ b/trace/tracestate_benchkmark_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/trace/tracestate_test.go b/trace/tracestate_test.go
index 4cd0fbc45f3..46b2375da49 100644
--- a/trace/tracestate_test.go
+++ b/trace/tracestate_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package trace
 
diff --git a/trace_test.go b/trace_test.go
index 21829767fd0..9aa1ba428f1 100644
--- a/trace_test.go
+++ b/trace_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel
 
diff --git a/verify_examples.sh b/verify_examples.sh
index dbb61a42279..e57bf57fce8 100755
--- a/verify_examples.sh
+++ b/verify_examples.sh
@@ -1,18 +1,7 @@
 #!/bin/bash
 
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 set -euo pipefail
 
diff --git a/version.go b/version.go
index 7b2993a1fef..8696673affe 100644
--- a/version.go
+++ b/version.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel // import "go.opentelemetry.io/otel"
 
diff --git a/version_test.go b/version_test.go
index 2ac1746094f..80845277fdc 100644
--- a/version_test.go
+++ b/version_test.go
@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package otel_test
 
diff --git a/versions.yaml b/versions.yaml
index 1b556e6782b..bad0dcf6c45 100644
--- a/versions.yaml
+++ b/versions.yaml
@@ -1,16 +1,5 @@
 # Copyright The OpenTelemetry Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 module-sets:
   stable-v1: