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 0x27b598f8503141d772aac729d87828332199c9f3c8c9b1cab15ab0923c599b36. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8f7a410-c6cc-4b5a-84bd-e626b4180309.json and https://artists.proofprofile.net/proofs/artist/a8f7a410-c6cc-4b5a-84bd-e626b4180309.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mikrokosmos, Sz. 107: Bagpipe Music. Allegretto in G Major (No. 138 Vol. V, with Improvised Prelude)
English Suite No. 2 in A Minor, BWV 807: I. Prélude
Musica Ricercata: VII. Cantabile, molto legato
Six Bagatelles, Op. 126: IV. Presto in B Major
Romanian Folk Dances, Sz. 56: III. Pê-loc. Andante
Musica Callada, Book II: XIII. Tranquillo
Adagio in B Minor, K. 540 (With Improvised Prelude)
Musica Callada, Book I: V. Legato metallico
Sonata No. 15 in D Major, Op. 28: IV. Rondo. Allegro ma non troppo
Pièces de clavecin avec une méthode: VII. Musette en rondeau (With Improvised Prelude)
Het Gruuthuse-Handschrift II. 108: Orlof, Vrauwe, Ende Ic Moet Gaen
Fantasia Upon One Note in F Major, Z. 745
English Suite No. 2 in A Minor, BWV 807: VI. Bourrée
Prelude and Fugue No. 1 in C Major, Op. 87 (With Improvised Prelude)
English Suite No. 2 in A Minor, BWV 807: I. Prélude - Piano
English Suite No. 2 in A Minor, BWV 807: I. Prélude - Fender Rhodes
Pièces froides: II. Danses de travers: No. 1, En y regardant à deux fois
Suite in E Major, BWV 1006a: I. Prélude (Arr. for Piano by Anthony Romaniuk)
Perpetuum Mobile (Arr. for Piano by Anthony Romaniuk)
4 Impromptus, D. 899: No. 3, Andante in G-Flat Major
Pièces froides: II. Danses de travers: No. 2, Passer
Piano Sonata, K043: I. Quarter note = 112
Faschingsschwank aus Wien, Op. 26: No. 4, Intermezzo
Le tombeau de Couperin, M. 68: I. Prélude. Vif
24 Preludes and Fugues, Op. 87: Prelude No. 2 in A Minor
Piano Sonata No. 17, Op. 31 No. 2: III. Finale
Pièces froides: II. Danses de travers: No. 3, Encore
Toccata Arpeggiata (Arr. for Piano and Synthesizer by Anthony Romaniuk)
Six Melodies for Violin and Keyboard: Melody No. 4
7 études rhythmiques, H. 202: VII. mit Pausen (Allegretto)
Partita No. 2 in D Minor, BWV 1004: V. Chaconne (With Harpsichord Improvisation)