1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb67e6d798bee717bb5ff3ebdc06516d32b098388e31386946e1b0751daa49c. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fad259d8-4c26-48d2-9441-b7c2afef4d2d.json and https://artists.proofprofile.net/proofs/artist/fad259d8-4c26-48d2-9441-b7c2afef4d2d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Divertimento n.2 in Si Bemolle Maggiore K 137
Exultate Jubilate Kv 165-Wolfgang Amadeum Mozart
Piano Sonata In A Major K 331 Alla Turca
Brandenburg Concerto No. 2 In F Major, BWV 1047 : I. Allegro Moderato
Brandenburg Concerto No. 2 in F Major, BWV 1047 : II. Andante
Brandenburg Concerto No. 2 in F Major, BWV 1047: III. Allegro assai
Mass in B minor, BWV 232 : "Et resurrexit"
Concerto for Harpsichord No. 5 In F Minor, BWV 1056 : I. Largo
Concerto from a Keyboard, BWV 974 : Adagio
Concerto for Harpsichord No. 1 In D Minor, BWV 1052 : Allegro
BWV 721 : "Erbarm Dich Mein, O Herre Gott "