About ProofOfPen

ProofOfPen captures a live writing session — keystroke bursts, pauses, pastes, periodic snapshots — and seals it into a tamper-evident proof pack: every event is hashed into a chain, so any edit after the fact breaks the chain and is visible to anyone.

Receipts, not detection

A proof pack is a process receipt. It shows how a text came to be. It does not, and cannot, prove who or what wrote it — a determined user can forge a capture. Unusually fast input bursts are flagged honestly inside the pack. We never claim courtroom-grade proof.

Verify anywhere

Packs verify on this site, or offline: the downloaded .html file re-checks its own chain in your browser, no server needed.