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 0x5a8f851992c619fefd068d544da0e49a4dcd1457b941ede6fd1628bbc7133083. 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/8e0ad545-4ade-44b1-a841-09d8661d848e.json and https://artists.proofprofile.net/proofs/artist/8e0ad545-4ade-44b1-a841-09d8661d848e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Debussy: Cakewalk from Children's Corner
Beethoven: Sonata Op.13 No. 8 in C Minor (Pathetique)
J.S. Bach: March in D Major, BWV Anh. 122
Beethoven: Sonata No. 14 in C Sharp Minor, Op. 27 No. 2, Mov. 1, Moonlight Sonata
Chopin: Contredanse in G Flat Major, B. 17
Bach: French Suite No.5 in G major, BWV 816, Gavotte
Chopin: Christmas Etude Op.25 No.1 in A Flat Major
Bach: Orchestral Suite No.2 in B minor, BWV 1067, Mov. 7 Badinerie
Bach: Prelude in B Flat Major No.21 BWV 866