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 0x283892b7a00ce75468d0f3bf89e051d678da1ae4a0edea06ef614a80fda023c2. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dd19dc6-366c-4da0-8606-debdb76343d9.json and https://artists.proofprofile.net/proofs/artist/2dd19dc6-366c-4da0-8606-debdb76343d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Horse with No Name (Electro Mix Version)
Navidad Canciones y Villancicos Gran Colección (Vol. 1)
White Christmas in My Dreams (New Version)
Wonderful and Magical Christmas Holidays
Our Christmas Songs, Nuestras Canciones de Navidad
Canciones de los Sesenta Setenta Ochenta
Mi mundo es al revés (En Directo en el Festival Universong)