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 0xd01ada0fb1f6b5ab7cebe128d9b32f5abf2b5822bfd170da60fdbd5abf418404. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8c2560e-d1eb-4c78-adad-5ca14e8164ab.json and https://artists.proofprofile.net/proofs/artist/b8c2560e-d1eb-4c78-adad-5ca14e8164ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boccherini: 3 Quartets for flute and strings, Op. 5 - Quintet in C major for flute, oboe and strings