Get a timestamped, cryptographically signed certificate proving when your text existed — plus an approximate AI-writing signal. One-time payment. No subscription, ever.
The certificate's real value is the SHA-256 hash + timestamp — cryptographic proof this exact text existed at this exact moment, in your name. That part is mathematically verifiable, not a guess.
The "writing-pattern signal" below (sentence-length variation and word repetition) is a rough, approximate indicator — not a courtroom-grade AI detector, and no offline tool honestly can be. We say so plainly instead of overselling it.
— issued
Writing-pattern signal (approximate):
SHA-256 fingerprint of the text: