Here's another similar project: https://writetrack.dev/

There's plenty of microbehavioral analysis we can do that is initially effective but will get bypassed (with GANs being the purest way, or something more domain-specific).

You could imagine a livestream that's permanently published somewhere. But the verification of the livestream takes longer than reading the piece itself (and is itself vulnerable to faking).

Personally I think it comes back to something like writing under your real name - staking your reputation - as the most trustworthy indicator. At least people in your circles can trust you.

You can read ahead as to how this would go by looking at the CAPTCHA world, which unbeknownst to a lot of people left behind "click this image" as the actual test a long time ago and does a lot of behavioral analysis of mouse motions and stuff. Which is itself a constant arms race. Which I would still characterize as "advantage attacker" with regard to that aspect of it, CAPTCHAs still have at least some utility more from the other streams they have access to that are harder to fake, e.g., "this IP address is from a rentable service space and thus more likely to be a bot" sorts of checks.