Check an attestation
Paste an attestation. Trust the math.
Anyone holding an activity attestation can check it here, in five steps that run in your browser. The bytes hash to the id, the published key set has the key, the Ed25519 signature is valid, and it has not expired. The same key signs every billable event and rebind.
Download yours from your Transparency page, or paste one someone sent you.
How this page works
Every check runs in your browser. The key set is fetched by your browser straight from me.ochk.io, not through any orangecheck API, and the signature check uses the same library that signs the attestation. So a checker on another machine, against any saved copy of the key, gets the same answer. Our servers being down does not change the result; only the expiry check eventually fails, once the expiry passes.