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 0x9c784a1f465ebf7cd54641335e9ec82a7f283aebd92efa5cae4e10fa9d0ea455. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d459ad7f-d001-405e-b816-94c9fa7707f1.json and https://artists.proofprofile.net/proofs/artist/d459ad7f-d001-405e-b816-94c9fa7707f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphonie fantastique, Op. 14 Rêverie. Passions
Une petite musique de nuit (Wolfgang Amadeus Mozart)
Mozart's Piano Concerto 21 2 Elvira Madiga
Das wohltemperierte Klavier I (Praeludium und Fuge 1 in C-Dur BWV 846)
Bach's Prelude no.1 in C major from Book 1
Bach's Prelude No.2 in C minor from book 1
Bach's Prelude No.3 in C-sharp from Book 1
Grillen in D flat, Fantaisiestuck opus.12, No.4
Sonata in C Major, K. 545 (3rd movement: Rondo: Allegretto)
Mozart's Sonata No. 1 In C Major, KV 279
Moonlight Sonate No. 14 in c sharp minor, Op. 27 No. 2