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 0x917e1e36c2603d7665e756ecaf57cddaddab994f0f1f2fa66c5012039e40ffd2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4139c3c-4de0-4de4-8226-090ccd41bba6.json and https://artists.proofprofile.net/proofs/artist/a4139c3c-4de0-4de4-8226-090ccd41bba6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ballade in F Major - Upon Piano Roll Duo-Art 092 Br, Issued 1923
Piano Sonata No. 8, Op. 13 "Pathetique": I. Grave - Upon Piano Roll Welte-Mignon 560, Issued 1905
Waltz, Op. 70, No. 1 in G-Flat Major (Posthumous) - Welte-Mignon 1465
Piano Pieces, Op. 119: No. 3, Intermezzo - Duo-Art 6911
Piano Concerto No. 5, Op. 73: I. Allegro (Arr. Solo Piano by Backhaus) - Triphonola T-51951A
Eugene Onegin: Theme & Selections (Arr. Solo Piano by Douloff) - Upon Piano Roll Welte-Mignon 2016, Issued 1910
Lyrische Stucke, Op. 43: No. 4, Voeglein Birdling (Little Bird) - Welte-Mignon 1277
Water Music Suite: Hornpipe (Arr. Solo Piano by Grainger) - Duo-Art 6754
4 Pieces, Op. 36: No. 4, Etude "The Spring" - Duo-Art 5699
Etude De Concert, Op. 2, No. 6, Si Oiseau J'etais, "Were I a Bird" - Welte-Mignon 1654
A La Campagne. Op. 40: No. 1, Waves and Billows - Welte-Mignon 1200
Concerto for Violin in F Minor, BWV 1056 (Arr. Solo Piano by Cortot): Adagio
The Tales of Hoffmann: Barcarolle - Duo-Art 101936
Caprice Bohemien in F Major - Duo-Art 67610
Etude Melodique, Op. 130, No. 1 in A-Flat Major - Duo-Art 5806
Morceaux De Fantaisie, Op. 3: Prelude, Op. 3, No.2 in C-Sharp Minor - Welte-Mignon 2079
Berceuse, Op. 57, in D-Flat Major - Duo-Art 7066
String Quartet, Op. 12: Canzonetta (Arr. For Solo Piano by Harold Bauer) - Due-Art 510-4
Piano Pieces, Op. 118: No.3 , Ballade - Duo-Art 74060
Lieder, Op. 49: No. 4, Wiegenlied (Arr. Solo Piano by Grainger) - Duo-Art 67180
Lieder Ohne Worte. Op. 62: No. 1 in G Major - Welte-Mignon 1209
The Seasons, Op. 37a: No. 6, Barcarolle (June) - Duo-Art 7128
Suite for Harpsichord, No. 14: Gavotte Varie - Welte-Mignon 540
Etudes, Op. 52: No. 6, Etude en Forme De Valse - Due-Art 6372
Piano Sonata No. 8, Op. 13, 'Pathetique': II. Adagio Cantabile - Welte-Mignon 561
Three Etudes De Concert S. 144: No. 3, Un Sospiro in D Flat - Welte-Mignon 569
Ballet Music from "La Gioconda": Dance of the Hours - Due-Art 67249
Valse De Concert, Op. 3 No. 1 in D-Flat Major - Welte-Mignon 778
Cavalleria Rusticana (Arr. Solo Piano by Gayraud): Fantasia (Part I) - Welte-Mignon 2813
Xerxes: Largo, in G Major - Duo-Art 66070
Die Zauberflote (The Magic Flute): Overture (Arr. 4 Hands Piano by Ganz) - Duo-Art 536-4
Scherzo No. 3, Op. 39 in C-Sharp Minor - Welte Mignon 265
Cavalleria Leggera: Overture - Due-Art 6661
Variations on the Name 'Abegg', Op. 1 - Welte-Mignon 525
Nocturnes, Op. 37: No .2 in G Major - Welte-Mignon 364
Artist's Life Waltz, Op. 316 (Kunstlerleben) - Duo-Art 6447
Aida (Arr. Solo Piano by Armbruster): Selections: Battle Hymn; Celeste Aida; O Terra-Adio; Triumphal Scene - Duo-Art 66769
Carmen (Arr. Solo Piano by Fabri): Scenes, Selections: Mountain Scene; Micaela's Aria; Habanera; Gipsy Ballet; Letter Scene; Quintette; Mountain Chorus; Toreador Song - Duo-Art 5618
Lohengrin (Arr. For Piano by Leopold): Act III Excerpts - Duo-Art 72980
Invitation to the Dance, Op. 65 - Duo-Art 7216
Davidsbündlertänze, Op. 6 - Welte-Mignon 691
Toccata in G Major BWV 916, No. 3 - Duo-Art 72369
From County Derry. Grainger, Bach & Masterworks from Golden Age of the Piano
Herz und Mund und Tat und Leben, BWV 147: Chorale: Jesus bleibet meine Freude (Jesu, Joy of Man's Desiring) (arr. M. Hess for piano): 'Jesu bleibet meine Freude', from Cantata, BWV 147 (arr.
Herz und Mund und Tat und Leben, BWV 147: Jesu bleibet meine Freude (Jesu Joy of Man's Desiring) (arr. M. Hess)
Etudes, Op. 4: No. 3 in B-Flat Minor - Duo-Art 0208 Br
Horizons. Piano Music of Mozart & Chopin
Les Sylvains. Piano Evocations from the Golden Age
Piano Sonata No. 25, Op. 79: III. Vivace - Duo-Art 0278 Br
Wiegenlied. Piano Music of Brahms and Mozart. Visions from the Golden Age.
Herz und Mund und Tat und Leben, BWV 147: Jesu bleibet meine Freude, "Jesu Joy of Man's Desiring" (arr. M. Hess for piano)
Coppelia. Brilliant Piano from the Golden Age
Chorale Prelude Whitsuntide, BWV. 631 (Arr. Solo Piano by Hess) - Duo-Art 0210 Br
Souvenirs. Piano Music from the Golden Age
Ständchen. Historical Piano Music by Schubert, Brahms and Grainger
Herz und Mund und Tat und Leben, BWV 147: Chorale: Jesus bleibet meine Freude (Jesu, Joy of Man's Desiring) (arr. M. Hess for piano): Jesu bleibet meine Freude (arr. M. Hess)
Fantasie. Heritage Piano Works of Bach and Chopin
Fruhlingsglaube. Historical Piano Music by Schubert, Brahms and Mozart
Herz und Mund und Tat und Leben, BWV 147: Chorale: Jesus bleibet meine Freude (Jesu, Joy of Man's Desiring) (arr. M. Hess for piano)
Herz und Mund und Tat und Leben, BWV 147: X. Jesu, joy of man's desiring (arr. M. Hess for piano)
Classical for Children - Smart Study, Intelligence, & Brain Power
Herz und Mund und Tat und Leben, BWV 147: X. Choral "Jesu bleibet meine Freude" (Arr. for Piano)