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 0x00bf7aa362a3092fd1a1967592ff0461e8e068f81fc93ef2a6d92981427f6c5c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81c176a5-cf66-4897-9165-c206da17fb80.json and https://artists.proofprofile.net/proofs/artist/81c176a5-cf66-4897-9165-c206da17fb80.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Passages. Hidden Treasures of Classical Piano.
Flute Sonata in E Minor, BWV 1034: I. Adagio Ma Non Tanto (Arr. For Piano by Irene Cantos)
Flute Sonata in E Minor, BWV 1034: II. Allegro (Arr. For Piano by Irene Cantos)
Flute Sonata in E Minor, BWV 1034: III. Andante (Arr. For Piano by Irene Cantos)
Flute Sonata in E Minor, BWV 1034: IV. Allegro (Arr. For Piano by Irene Cantos)
Capriccio in B-Flat Major, BWV 992: I. Arioso
Wiegenlied, Op. 49: No. 4 (Arr. Max Reger)
11 Bagatelles, Op. 119: No. 1, Allegretto
Dido & Aeneas (Arr. For Piano by Irene Cantos): Act III, Z. 626: X. Dido's Lament
Haydn: Sonata in D, Hob.XVI:37: I. Allegro Con Brio - From Aeolian Piano Roll
Haydn: Sonata in D, Hob.XVI:37: II. Largo E Sostenuto - From Aeolian Piano Roll
Haydn: Sonata in D, Hob.XVI:37: III. Finale. Presto Ma Non Troppo - From Aeolian Piano Roll
Andante from Organ Prelude in E Minor (Arr. By Siloti)
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part I
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part II
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part III
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part IV
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part V
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part Vi
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part VII
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part VIII
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part IX
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part X
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part XI
Chaconne in D Minor from Violin Partita BWV 1004 (Arr. By Busoni): Part XII
8 Pieces for Piano, Op. 72: No. 4, Danse Characteristique
Danzas Españolas, Op. 47: No. 5, Española
Fairy Tales Pictures, Op. 3: The Fairy Tale's Epilogue
Preludes, Op. 1: No. 7 in C Minor, Moderato
Widmung, Op. 25, No. 1 (Transcription by Liszt)
Fantasiestucke, Op. 12: No. 7, Traumes Wirren
Tableaux for Solo Piano, Book I: Vers Le Vent D'ouest, Op. 36
Tableaux for Solo Piano, Book I: Le Miroir D'un Instant, Op. 39
On an Overgrown Path, Book I: VII. Good Night!
Ramón Paús: Le Joie de Pierre-Auguste (Selection)
Le Joie de Pierre-Auguste: Moderato. Ragtime
Le Joie de Pierre-Auguste: Adagio. Como Cada Mañana Entre el Dolor y la Belleza...
Le Joie de Pierre-Auguste: Andante. Astor in aeternam...
Le Joie de Pierre-Auguste: Maestoso. En esos días dolientes...
Reminiscences. Hidden Treasures of Classical Piano
Well Tempered Clavier, Book I: Prelude No. 3 in C Sharp Major BWV 848
11 Bagatelles, Op. 119: No. 9, Vivace Moderato
Die Ruinen Von Athen, Op. 113: Turkish March (Arr. Solo Piano by Rachmaninoff) - From A. 68771-H
Nocturnes, Fp 56: Nocturne No.6, Très Calme Mais Sans Traîner
Three Hungarian Folksongs from Csík Sz. 35A: 1. The Peacock
Children's Notebook, Op. 69: 2. In Waltz Tempo
Estudio para uracilo, un príncipe genómico
Lo que pasa / Comandante / Talla de madera / Primos hermanos
Perdona / ¿No puedes dormir? / Recuerdos
125 Miniatures. Hidden Treasures of Heritage Piano
Prelude in B Minor BWV 855a (Arr. By Siloti)
Well Tempered Clavier, Book I: Prelude No. 1 in C Major BWV 846
Preludes, Op. 11: No. 13 - Welte-Mignon 2069
Clarinet Concerto in A Major KV 622 (Piano Transcription by Hans-Günter Heumann): II. Adagio
11 Minuets KV. 176: Minuet III in E-Flat Major
Etude, Op. 25, No.9 (Butterfly) G-Flat Major - Duo-Art 5649
Waltz, Op. 39, No. 15 A-Flat Major - Duo-Art 5642.
L'amour Des Trois Oranges: March (Arr. Solo Piano by Prokofiev) - Duo-Art 8018
Lieder Ohne Worte. Op. 102, No.5. Sighing Wind - Duo-Art 5935 [2]
10 Pieces for Piano No. 4, Op. 12: Gavotte
Impromptus on a Theme by Clara Schumann, Op. 5: Theme. Ziemlich Langsam
Impromptus on a Theme by Clara Schumann, Op. 5: No. 1, -
Impromptus on a Theme by Clara Schumann, Op. 5: No. 2, Lebhafter
Impromptus on a Theme by Clara Schumann, Op. 5: No. 4, Ziemlich Langsam
Impromptus on a Theme by Clara Schumann, Op. 5: No. 3, Sehr Präcis
Impromptus on a Theme by Clara Schumann, Op. 5: No. 5, Lebhafter
Kinderszenen, Op. 15: Träumerei - Upon Aeolian Roll
Two Studies, Op. 38: No. 1, Folk Tune - Due-Art 0333
2 Piano Pieces, Op. 157: No. 2, La Fileuse. Etude - Welte-Mignon 424
Twelve Etudes. Op. 39.: No. 7, Idyll - Due-Art 6355
British Folk-Music Settings: No. 4, Shepherds Hey - Welte-Mignon 3790
Studies, Op. 740: No.5, Octave Study - Welte-Mignon 2430
Ashes of Roses (Valse Elegante) - Due-Art 70036
Funf Charakterstucke, Op. 32: No. 3, Rustle of Spring (Fruhlingsrauschen) - Welte-Mignon 375
Glissando-Mazurka, Op. 259, No. 2 - Duo-Art 72128 [Remastered]
A La Campagne. Op. 40: No. 1, Waves and Billows - Welte-Mignon 1200
Album Leaf. Op. 28: No. 3, Dance Caprice - Due-Art 04 Br
Pesenka, Inr 90: Little Song, in Dorian Mode
2 Piano Pieces, Op. 38: Prelude-Impromptu, Op. 38, No. 1
Well-Tempered Clavier, Book II: Fugue No. 12 in F Minor, BWV 881 - Welte-Mignon 544
Preludes, Op. 31: No. 6, Ancient Melody of the Synagogue - Welte-Mignon 520
Petite Suite, Op. 1: No. 6, Serenade - Welte-Mignon 1042
The Tales of Hoffmann: Barcarolle - Duo-Art 101936
'Greetings', Miniaturas para Piano: 2 Palabras: 'Siempre Adelante'
Nocturnes, Fp 56: Nocturne No.4, Bal Fantôme. Lent, Très Las Et Piano (C Minor)
Xàfec de Llum I Tenebres: I. Como Lluvia Fina
Xàfec de Llum I Tenebres: III. Quizás la Luz
Xàfec de Llum I Tenebres: IV. Iridiscente
Xàfec de Llum I Tenebres: V. Diario de Dudas
Passages. Hidden Treasures of Classical Piano (Extended Edition)
Chromatic Fantasia. Piano Music of Bach, Debussy & Tchaikovsky
La Fleurie, Ou La Tendre Nannette (Arr. Solo Piano by Jeanne-Marie Darré) - Duo-Art 075 Br
Prélude À L'après-Midi D'un Faune (Arr. Solo Piano by Leonard Borwick) - Upon Piano Roll Duo-Art 6532, Issued 1922
Piano Sonata, Op. 37 in G Major: II. Andante Non Troppo, Quasi Moderato - Upon Piano Roll Welte-Mignon 557, Issued 1905
6 Pieces, Op. 51: Valse Sentimentale, Op. 51, No. 6
6 Pieces, Op. 19: Nocturno, Op. 19, No. 4
Chromatic Fantasia in D Minor, Bvw 903 (Arr. Solo Piano by Von Bülow) - Upon Piano Roll Duo-Art 7316, Issued 1929
2 Piano Pieces, Op. 38: Mazurka, Op. 38, No. 2
Preludes, Op. 23: Prelude, Op. 23 in D Major, No. 4, Andante Cantabile
Preludes, Op. 23: Prelude, Op. 23 in C Minor, No. 7, Allegro
Preludes, Op. 32: Prelude in G-Sharp Minor, Op. 32, No. 12, Allegro
Preludes, Op. 23: Prelude in E-Flat Major, Op. 23, No. 6, Andante
Preludes, Op. 23: Prelude in B-Flat Major, Op. 23, No. 2
Forgotten Melodies I, Op. 38: Canzona Serenata, Op. 38, No. 6
10 Pieces for Piano No. 1, Op. 12: March
3 Pieces, Op. 45: No. 1, Feuillet D'album
Chiffres et Constellations Amoureux D'une Femme (d’après la XXe constellation de Joan Miró): Chiffres et Constellations Amoureux D'une Femme (d’après la XXe constellation de Joan Miró)
El Huésped Cuántico: El Huésped Cuántico
Luz negra II (De máquina oscura): Luz negra II (De máquina oscura)