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 0x78f3dcf7edeeb2205b06512080f4cdb24f0d24bcbb16ae93cbc3ee09e58afe0a. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4674e10f-1019-480d-8c3b-bc039ac744e5.json and https://artists.proofprofile.net/proofs/artist/4674e10f-1019-480d-8c3b-bc039ac744e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Catedra Del Cante Vol. 7: Juanito Mojama
The Best Collection. History of Flamenco. Vol. 7: Juanito Mojama