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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa710f5e288371f96d32129cd68abf8a6f01681eb9f41cb1b3a9db3256eda71b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59ff9242-2bf6-4aa9-8e8e-3caaa799e0d8.json and https://artists.proofprofile.net/proofs/artist/59ff9242-2bf6-4aa9-8e8e-3caaa799e0d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boires I Retrets (Cancó Oficial de la Volta 2022)
Jamaican Sessions. A Tribute to Jamaican Stars