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 0x9473f57a201504b61c36efcae03f4b6b44e62f678de3bc04b533f596e9d9de40. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8606519-3a8c-4e18-84ce-76bf2a929227.json and https://artists.proofprofile.net/proofs/artist/f8606519-3a8c-4e18-84ce-76bf2a929227.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Moonlight Sonata (Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto)
Cantata, BWV 147: Jesu, Joy of Man's Desiring
Bagatelle No. 25 in A minor, WoO 59 "Für Elise”
Serenade for Strings in E major, Op. 22, B. 52: II. Tempo di valse
String Quintet in E major, Op. 11, No. 5 (Minuet)
Cello Suite No.1 in G Major, BWV 1007: I. Prélude
Concerto in F minor, Op. 8, No. 4, RV 297 "L'inverno" (winter): I. Allegro non molto