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|[Granite](https://specs.optimism.io/protocol/granite/overview.html)|[approved](https://gov.optimism.io/t/upgrade-proposal-10-granite-network-upgrade/8733)| Wed Sep 11 16:00:01 UTC 2024 (`1726070401`) around block `125235812`| Mon Aug 12 16:00:00 UTC 2024 (`1723478400`) around block `15837930`|
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|[Fjord](https://specs.optimism.io/protocol/fjord/overview.html)|[approved](https://gov.optimism.io/t/upgrade-proposal-9-fjord-network-upgrade/8236)| Wed Jul 10 16:00:01 UTC 2024 (`1720627201`) around block `122514212`| Wed May 29 16:00:00 UTC 2024 (`1716998400`) around block `12597930`|
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|[Ecotone](https://specs.optimism.io/protocol/ecotone/overview.html)|[approved](https://gov.optimism.io/t/upgrade-proposal-5-ecotone-network-upgrade/7669)| Thu Mar 14 00:00:01 UTC 2024 (`1710374401`) around block `117387812`| Wed Feb 21 17:00:00 UTC 2024 (`1708534800`) around block `8366130`|
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|[Delta](https://specs.optimism.io/protocol/delta/overview.html)|[approved](https://gov.optimism.io/t/final-upgrade-proposal-3-delta-network-upgrade/7310)| Thu Feb 22 00:00:00 UTC 2024 (`1708560000`) around block `116480612`| Fri Dec 22 00:00:00 UTC 2023 (`1703203200`) around block `5700330`|
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|[Canyon](https://specs.optimism.io/protocol/canyon/overview.html)|[approved](https://gov.optimism.io/t/final-upgrade-proposal-2-canyon-network-upgrade/7088)| Thu Jan 11 17:00:01 UTC 2024 (`1704992401`) around block `114696812`| Tue Nov 14 17:00:00 UTC 2023 (`1699981200`) around block `4089330`|
|[Granite](https://specs.optimism.io/protocol/granite/overview.html)|[approved](https://gov.optimism.io/t/upgrade-proposal-10-granite-network-upgrade/8733)| Wed Sep 11 16:00:01 UTC 2024 (`1726070401`) around block `125235812`| Mon Aug 12 16:00:00 UTC 2024 (`1723478400`) around block `15837930`|
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|[Fjord](https://specs.optimism.io/protocol/fjord/overview.html)|[approved](https://gov.optimism.io/t/upgrade-proposal-9-fjord-network-upgrade/8236)| Wed Jul 10 16:00:01 UTC 2024 (`1720627201`) around block `122514212`| Wed May 29 16:00:00 UTC 2024 (`1716998400`) around block `12597930`|
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|[Ecotone](https://specs.optimism.io/protocol/ecotone/overview.html)|[approved](https://gov.optimism.io/t/upgrade-proposal-5-ecotone-network-upgrade/7669)| Thu Mar 14 00:00:01 UTC 2024 (`1710374401`) around block `117387812`| Wed Feb 21 17:00:00 UTC 2024 (`1708534800`) around block `8366130`|
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|[Delta](https://specs.optimism.io/protocol/delta/overview.html)|[approved](https://gov.optimism.io/t/final-upgrade-proposal-3-delta-network-upgrade/7310)| Thu Feb 22 00:00:00 UTC 2024 (`1708560000`) around block `116480612`| Fri Dec 22 00:00:00 UTC 2023 (`1703203200`) around block `5700330`|
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|[Canyon](https://specs.optimism.io/protocol/canyon/overview.html)|[approved](https://gov.optimism.io/t/final-upgrade-proposal-2-canyon-network-upgrade/7088)| Thu Jan 11 17:00:01 UTC 2024 (`1704992401`) around block `114696812`| Tue Nov 14 17:00:00 UTC 2023 (`1699981200`) around block `4089330`|
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| Bedrock | ([https://gov.optimism.io/t/final-upgrade-1-bedrock-protocol-upgrade-v2/5548](https://gov.optimism.io/t/final-upgrade-1-bedrock-protocol-upgrade-v2/5548)) | Tue Jun 06 2023 16:28:23 UTC (`1686079703`) at block `105235063`| N/A |
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## Summary of changes
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These are the summaries of each network upgrade changes ordered by the most
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These are the summaries of each network upgrade changes ordered by the most
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recent activation. These are a reflection of the [Superchain Upgrades Specifications](https://specs.optimism.io/protocol/superchain-upgrades.html)
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rollup-node (`canyon_time`) and execution engine (`config.canyonTime`). Shanghai time in the
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execution engine should be set to the same time as the Canyon time.
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### Bedrock
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The Bedrock upgrade transitioned the OP Stack from its legacy design to a modern modular architecture. This new design separates the OP Stack into distinct consensus, execution, and settlement layers, enabling more efficient integration of future improvements and facilitating the growth of a Superchain ecosystem.
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## Upgrade process
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Network upgrades follow this general process in which the features included in
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