For a global feed? No, as far as I know nobody has one yet

For individual feeds? Yes, "web of trust"

You add a "verified human" tag to any users you've met face-to-face

Then you can filter by

• Your tagged humans
• Tagged human by you or those you follow
• Tagged human by you, those you follow, or those they follow

Etc.

And the focus should be on filtering bots and ensuring accountability, not trying to stop people from posting "AI"

You can still post incorrect shit generated by chatGPT, but if you want to show up in filtered feeds, you have to be an actual human saying chatGPT's incorrect shit with your own face's reputation on the line

This is much better than pretending it's possible to prove what is or isn't "AI" as an excuse to later pretend some AI posts aren't and some non-AI posts are