Verification hub

Verification center

How a third party verifies a sealed X'am without trusting either party.

Verify without trusting us

Every published reading is pre-registered and sealed before measurement begins. Verification does not require our cooperation, our systems, or our word.

The verification path

• Read the public pre-registration and note its recorded hash.
• Recompute the hash of the instance file you were given and compare the two.
• Confirm the OpenTimestamps proof resolves and that its time precedes the measurement window.
• Confirm the signature against the published signing identity.
• Confirm the witness record for the seal.

Pre-registration

A pre-registration fixes the protocol, the subject set, and the scoring rule before anyone looks. A reading whose protocol moved after measurement is void, and is listed as void rather than removed.

Signing and witnessing

Seals are signed by a hardware-held key and witnessed. The signing identity and the witness arrangement are published so a stranger can check a signature without asking us for anything.

A limitation we state up front

A reading is taken against a specific model and a specific provisioning at a specific time. Same-model and same-provisioning conditions are recorded with the reading. A result obtained under different conditions is a different reading, and we do not represent that the two are interchangeable.