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 0xa456604c82e25ead006e4af0c2983279a65c83a56f63d86890adb7993c564765. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/940a0e9d-0d42-41a5-a43e-0845912f662b.json and https://artists.proofprofile.net/proofs/artist/940a0e9d-0d42-41a5-a43e-0845912f662b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Aliénor (Música en la corte de Leonor de Aquitania / Music at the Court of Eleanor of Aquitaine)
Adio, Kerida (Canciones Sefardíes - Sephardic Songs)