Verify the ring is closed and sound — no account required
Load the ceremony files

These are the files you received for the ceremony — the proof JSON and your copy of the document. Enter the ceremony ID below, or load them yourself.

Verify by ceremony ID

In the link or email you received from the organizer.

The server only delivers the files — your browser does the checking. Nothing is trusted to the server.

Or load the files yourself

Ring summary
Document fingerprint check
COSigna — patent EP3665600B1 · US11531746B2 · FR3070079B1
Report bug COSigna — a Cryptographic Ring of Mutual Consent · The ring is strong because the loop is closed. The ring is strong because the loop is closed. COSigna