https://opensource.contentauthenticity.org/
Integrate secure provenance signals into your site, app, or service using open-source tools developed by the Content Authenticity Initiative.
open sourcetoolscontentauthenticityprovenance
https://github.com/KustoszApp/server/
Focus on the worthwhile content with Kustosz, open source self-hosted web application. This repository contains backend server. - KustoszApp/server
on thegithubserverfocuscontent