Paste any thetacog Air Receipt + the issuing host's ed25519 public key. We verify the signature in your browser. No data leaves your machine.
Anyone who fixed AI reliability fixed competence verification at silicon speed too — by Rice (1953), same problem. They didn't. We did. We patented it.
This page is what makes the receipt sovereign: you, the recipient, verify the signature yourself without trusting our server. The verification runs in your browser via Web Crypto API. Schema · Argument
Drag-drop a .json file here, or paste the body. The signature field is signature: "ed25519:..."; we strip that field before re-canonicalizing the body for verification (the signature was computed over the body WITHOUT the signature + fingerprint fields).
The receipt's signature_pub_fingerprint is the first 16 base64 chars of the SPKI-encoded pubkey — quick visual cross-check against the key you paste here.