How does this compare to VoiceInk which is also open-source and been there much longer and supports all the features that you have? https://github.com/Beingpax/VoiceInk
The WP plugin allows you to timestamp any content type (post, page, custom post type) into the blockchain so that you can create immutable proof of revision historical data. This allows you to increase "content provenance" by proving with "time".
Because the Internet Archive is in GRAVE DANGER, then this will help prove ownership of your content historically (especially for legal purposes where blockchain is used in your country's court of law).
Only the "fingerprint" (SHA256 hash) of the content is stored in the blockchain. Keeping it privacy-friendly.
The repository uses a GitHub action to automatically deploy the plugin updates to the WP SVN plugin repo.