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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9548f9edb818629edbf368c629299238f07a355c4f4dfe9738ac10ea996782cc. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8135769-5ab0-4766-b0f0-644d32693cb9.json and https://artists.proofprofile.net/proofs/artist/e8135769-5ab0-4766-b0f0-644d32693cb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jensen, John: Treasury of Mainstream Jazz Piano (A)
Bloch: Piano Sonata No. 3 / Ruggles: Evocations (Version for Piano) / Reale: Piano Sonata No. 3 / Lipkis: Scaramouche Variations
Evocations: I. Largo (Original Version for piano)
Evocations: II. Andante con Fantasia (Original Version for piano)
Evocations: III. Moderato appassionato (Original Version for piano)
Evocations: IV. Adagio sostenuto (Original Version for piano)
Piano Sonata No. 3, "Sonata Brahmsiana": I. Energico
Piano Sonata No. 3, "Sonata Brahmsiana": II. Andante tranquillo
Piano Sonata No. 3, "Sonata Brahmsiana": III. Recitative
Piano Sonata No. 3, "Sonata Brahmsiana": IV. Finale
Piano Sonata: II. Pastorale. Andante - Calmo
Scaramouche Variations: III. Dark, sinister
Reale: Piano Sonata No. 1 / Dance Sonata / Copland: Piano Blues Nos. 1-4 / Piano Fantasy
Piano Sonata No. 1: II. Mysteriously: Chorale
Piano Fantasy: Twice as slow, with humor -
Dance Sonata, "Piano Sonata No. 2": I. In the Ballroom
Dance Sonata, "Piano Sonata No. 2": II. Pas de Deux -
Dance Sonata, "Piano Sonata No. 2": III. Dancing in the Streets
Carnival in Flanders: Here's That Rainy Day