We built the opposite of an AI detector - cryptographic proof of human authorship

Hey PH community! We just launched Purely Human (purelyhuman.world) - cryptographic proof that a human wrote something.

The problem: AI detectors like GPTZero and Turnitin have 20-40% false positive rates. Students are getting expelled. Writers are losing clients. The trust in human content is broken.

Our approach: Instead of detecting AI after the fact, we capture 12 biometric signals WHILE you type - keystroke dynamics, rhythm, behavioral patterns, and more. This gets sealed into a tamper-evident cryptographic proof that anyone can verify in one click.

Think of it as HTTPS for written content.

We are free for .edu emails (unlimited) and have a generous free tier for everyone else.

Would love feedback from this community - what do you think? We are also exploring a formal PH launch and looking for advice from experienced hunters.

purelyhuman.world