Nancy may refer to: Places France Nancy, France, a city in the northeastern French department of Meurthe-et-Moselle and formerly the capital of the duchy of Lorraine Arrondissement of Nancy, s
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb577b9efc9202c7742ddfdadd6f912155a211090887b2c2e30a8c71209005fea. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84d7fdaf-c3ed-41cb-ae86-cdb389a873b4.json and https://artists.proofprofile.net/proofs/artist/84d7fdaf-c3ed-41cb-ae86-cdb389a873b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).