Cryptographically sign Written Books on a Spigot server to verify their legitimacy. Alert players if a Written Book's title, author, or content has been altered since it has been signed.
Spigot or a Spigot derivative 1.14+
/bookverify - Information about the plugin
/signbook - Cryptographically sign a Written Book. The Written Book must have the same author as the player running the command
/signbook <username> - Cryptographically sign a Written Book as another user. Requires permission `bookverify.sign.other`