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 0x302117178141da5b3a678b28e2bacf62ba06aa0eb93adf3c22fa0b4c038294ce. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22b49b39-5814-4701-8545-de8cbe0160e4.json and https://artists.proofprofile.net/proofs/artist/22b49b39-5814-4701-8545-de8cbe0160e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Amores Grup De Percussió/ Llorenç Barber
Amores Grup de Percussió: 30 anys (1989-2019) [Versió remasteritzada especial 30 aniversari del Amores Grup de Percussió]