thumb|200px|right|Church of St. Joseph, Villa Crespo. Villa Crespo is a middle class neighborhood in Buenos Aires, Argentina, located in the geographical center of the city. It had a population of 83,
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 0xad33dde39b7ca0463ebd72d4cf4e7494ca40305c89c1915d793249a4c5406216. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28f31481-218c-4a64-91e9-a3e16bbaa79d.json and https://artists.proofprofile.net/proofs/artist/28f31481-218c-4a64-91e9-a3e16bbaa79d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).