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 0x7ad162d76a00198603d0e94a17639dff7048dec3cd23609b7ef98badcafbece9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/820b8e74-b501-44ab-ac6a-767669834594.json and https://artists.proofprofile.net/proofs/artist/820b8e74-b501-44ab-ac6a-767669834594.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chamber Music - Abel, C.F. / Quantz, J.J. / Benda, F. / Telemann, G.P. / Benda, G. / Kirnberger, J.P. / Muthel, J.G. (Amor Ist Mein Lied)
Flute Music - Hotteterre / Boismortier / Philidor / Couperin, F.
Music of the Sensitive Style for Flute & Harp