SAUCE REQUEST
I remember a few years ago reading about a project to "help fight misinformation" that was a centralized database that sounds a lot like this… around the time that meme image hashes/metrics were suspected of being shared between services, so clever anons started editing the image corners, etc.
Any anon have some sauce on this? Article(s) about these central system(s) used to share this sort of information between bigtech/bigsocials (govt likely)?