Verify an attestation
Paste an attestation envelope you were sent. Verification is instant and needs nothing but the envelope — it checks the signature and recomputes the evidence root from the signed facts.
Published attestations
No attestations have been published yet. When a building is turned over or a monitoring period closes, its signed attestation is published here and becomes independently verifiable by anyone — no login, no access to the building's data.
How verification works
A verifier holds only the envelope. That is enough to prove it is authentic and internally consistent — and it is impossible to reconstruct any facility data from it.
Paste the envelope
A signed statement of a baseline hash, the ledger range it covers, and a summary of change over the period. Only hashes and counts.
Check the signature
The Ed25519 signature is verified and the evidence root is recomputed from the signed facts. A tampered payload or a wrong signer fails immediately.
See what's proven
Who signed it, the period, the committed baseline, and the evidence root — plus, plainly, what the envelope alone cannot prove without the ledger.