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 0xc773a11f5e02576aa2f98513510331679e5a40e075e9a77454ad30d3ce85cca3. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/994f32f4-6196-4ff4-b165-fe9180d7ff81.json and https://artists.proofprofile.net/proofs/artist/994f32f4-6196-4ff4-b165-fe9180d7ff81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonata For 2 Pianos And Percussion, Sz. 110: 1. Assai lento
Sonata For 2 Pianos And Percussion, Sz. 110: 2. Lento, ma non troppo
Sonata For 2 Pianos And Percussion, Sz. 110: 3. Allegro non troppo
Kreisleriana, Op. 16: II. Sehr innig und nicht zu rasch
Kreisleriana, Op. 16: III. Sehr aufgeregt
Kreisleriana, Op. 16: VIII. Schnell und spielend
Arpeggione Sonata in A Minor, D. 821: I. Allegro moderato
Arpeggione Sonata in A Minor, D. 821: II. Adagio –
Arpeggione Sonata in A Minor, D. 821: III. Allegretto
Le Carnaval des Animaux: Introduction et Marche royale du Lion
Le Carnaval des Animaux: Hémiones (Animaux véloces)
Le Carnaval des Animaux: Le Coucou au fond des bois
2 Rhapsodies, Op. 79: No. 2 in G Minor. Molto passionato, ma non troppo allegro
Keyboard Concerto in D Major, Hob. XVIII:11: I. Vivace
Württembergisches Kammerorchester Heilbronn
Keyboard Concerto in D Major, Hob. XVIII:11: II. Un poco adagio (Cadenza: Landowska)
Keyboard Concerto in D Major, Hob. XVIII:11: III. Rondo all'ungarese. Allegro assai
Piano Concerto No. 1 in C Minor, Op. 35: I. Allegro moderato
Piano Concerto No. 1 in C Minor, Op. 35: II. Lento
Piano Concerto No. 1 in C Minor, Op. 35: III. Moderato
Piano Concerto No. 1 in C Minor, Op. 35: IV. Allegro con brio
Piano Quartet No. 1 in G Minor, Op. 25: I. Allegro
Piano Quartet No. 1 in G Minor, Op. 25: II. Intermezzo (Allegro ma non troppo)
Piano Quartet No. 1 in G Minor, Op. 25: III. Andante con moto
Piano Quartet No. 1 in G Minor, Op. 25: IV. Rondo alla Zingarese
En blanc et noir, L.134 - for 2 pianos: 1. Avec emportement
En blanc et noir, L.134 - for 2 pianos: 2. Lent. Sombre
En blanc et noir, L.134 - for 2 pianos: 3. Scherzando
Fantaisie for Piano and Orchestra, CD 72: I. Andante ma non troppo
Fantaisie for Piano and Orchestra, CD 72: II. Lento e molto espressivo
Fantaisie for Piano and Orchestra, CD 72: III. Allegro molto
Suite No. 2 For 2 Pianos, Op. 17: 1. Introduction (Alla marcia)
Suite No. 2 For 2 Pianos, Op. 17: 2. Waltz (Presto)
Suite No. 2 For 2 Pianos, Op. 17: 3. Romance (Andantino)
Suite No. 2 For 2 Pianos, Op. 17: 4. Tarantella (Presto)
Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
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Ma mère l'oye, M.60: 1. Pavane de la Belle au bois dormant: Lent
Ma mère l'oye, M.60: 2. Petit Poucet: Très modéré
Ma mère l'oye, M.60: 3. Laideronnette, Impératrice des pagodes: Mouvement de Marche
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Ma mère l'oye, M.60: 4. Les Entretiens de la Belle et de la Bête: Mouvement de Valse très modéré
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Ma mère l'oye, M.60: 5. Le Jardin féerique: Lent et grave
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Rapsodie espagnole, M.54: 1. Prélude à la nuit: Modéré
Rapsodie espagnole, M.54: 2. Malagueña: Assez vif
Rapsodie espagnole, M.54: 3. Habanera: En demi-teinte et d'un rhythme las
Rapsodie espagnole, M.54: 4. Feria: Assez vif
Gabriel Fauré, Johann Sebastian Bach, Joseph Gabriel Rheinberger, Léo Delibes & Wolfgang Amadeus Mozart: Festliches Konzert in Der Abteikirche Amorbach Für Orgel, Drei Trompeten Und Pauken
Ratswahlkantate in D-Dur, BWV 29: Sinfonia, Presto
Cantata in G major, BWV 151: Süßer Trost, mein Jesus kömmt, Molto adagio - Vivace
Kantate, BWV 130: Herr Gott, dich loben alle wir
Orgelkonzert in D moll, BWV 596: Tempo ordinario - Grave - Fuga - nach Vivaldi
Orgelkonzert in D Moll, BWV 596: Largo e spiccato - nach Vivaldi
Orgelkonzert in D Moll, BWV 596: Allegro - nach Vivaldi
KV 616: Ein Andante für eine Walze in eine kleine Orgel in F-Dur
Orgelsonate Nr. 11 in D Moll, Op. 148: Agitato
Orgelsonate Nr. 11 in D Moll, Op. 148: Cantilene
Chamber Symphony, Op. 110a - orch. Barshai: 1. Largo (attacca:)
Symphony For Strings And Woodwinds Op. 73A (Orch. Barshai): 1. Allegretto
Chamber Symphony, Op. 110a - orch. Barshai: 2. Allegro molto (attacca:)
Symphony For Strings And Woodwinds Op. 73A (Orch. Barshai): 2. Moderato con moto
Chamber Symphony, Op. 110a - orch. Barshai: 3. Allegretto (attacca:)
Symphony For Strings And Woodwinds Op. 73A (Orch. Barshai): 3. Allegro non troppo
Chamber Symphony, Op. 110a - orch. Barshai: 4. Largo (attacca:)
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Symphony For Strings And Woodwinds Op. 73A (Orch. Barshai): 4. Adagio - attacca:
Chamber Symphony, Op. 110a - orch. Barshai: 5. Largo
Symphony For Strings And Woodwinds Op. 73A (Orch. Barshai): 5. Moderato
Symphony for Strings Op. 118A (orch. Barshai): 1. Andante
Prelude in Memoriam Dmitri Shostakovich: Andante
Symphony for Strings Op. 118A (orch. Barshai): 2. Allegretto furioso
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Symphony No. 15, Op. 141 - Arr. Viktor Derevianko (with the participation of Mark Pekarsky): 1. Allegretto
Symphony for Strings Op. 118A (orch. Barshai): 3. Adagio (attacca:)
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Symphony No. 15, Op. 141 - Arr. Viktor Derevianko (with the participation of Mark Pekarsky): 2. Adagio - Largo - Adagio - Largo (attacca:)
Symphony for Strings Op. 118A (orch. Barshai): 4. Allegretto - Andante
Symphony No. 15, Op. 141 - Arr. Viktor Derevianko (with the participation of Mark Pekarsky): 3. Allegretto
Chamber Symphony Op. 83A (Orch. Barshai): 1. Allegretto
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Symphony No. 15, Op. 141 - Arr. Viktor Derevianko (with the participation of Mark Pekarsky): 4. Adagio - Allegretto - Adagio - Allegretto
Chamber Symphony Op. 83A (Orch. Barshai): 2. Andantino
Chamber Symphony Op. 83A (Orch. Barshai): 3. Allegretto - attacca:
Chamber Symphony Op. 83A (Orch. Barshai): 4. Allegretto
Schnittke: Praeludium In Memoriam Dmitri Shostakovich / Shostakovich: Symphony No. 15
Violin Sonata No. 6 in G Major, BWV 1019: II. Largo
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Sonata in A Major for Violin and Continuo, Op. 2/2 , RV 31: II. Adagio
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Oboe Sonata in f major, HWV 363a - Transcribed by Reginald Kell: Allegro
Sonata for Piano and Violin in F Major, K.13: 3. Menuetto primo - Menuetto secondo
24 Preludes, Op. 28: No. 6 in B Minor, Lento assai (Arr. for Cello and Piano by A. Franchomme)
Cello Sonata No. 3 in A Major, Op. 69: III. Adagio cantabile –
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Nutcracker Suite, Op. 71a, TH 35: Danse Chinoise, Allegro moderato (Arr. Economou for 2 Pianos)
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Petite pièce, CD 127 (Version for Oboe d'amore & Piano)
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16 Waltzes, Op. 39 - For Piano Duet: 4. in E minor
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Trois morceaux en forme de poire: No.1 - Lentement
Valse sentimentale, Op. 51, No. 6: Valse sentimentale, Op. 51, No. 6
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Sonata for Cello and Piano No. 3 in A Major, Op. 69: III. Adagio cantabile - Allegro vivace
Violin Sonata No. 10 in G Major, Op. 96: III. Scherzo (Allegro)
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44 Duos for 2 Violins, Sz. 98: No. 43, Pizzicato. Allegretto
Cello Sonata No. 1 in F Major, Op. 5 No. 1: Ic. Adagio – Presto
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The Constant Music Master - Instalment 2 / 11. Duetto à Violino ò Flauto e Viola pomposa In G Maj.: 2. Scherzando
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Peer Gynt Suite No. 1, Op. 46 - Arr. The Cambridge Buskers: 4. In the Hall of the Mountain King
5 Easy Pieces for Piano Duet: 1. Andante
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16 Waltzes, Op. 39 - For Piano Duet: 15. in A
44 Duos for 2 Violins, Sz. 98: No. 5, Slovakian Song 1. Molto moderato
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12 Movements from Romeo and Juliet, Op. 64: X. Dance Of Five Couples (Transcription For 2 Pianos By Sergei Babayan)
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12 Movements from Romeo and Juliet, Op. 64: VI. Juliet As A Young Girl - The Nurse Delivers Juliet's Letter To Romeo (Transcription For 2 Pianos By Sergei Babayan)
Sonata For Viola Da Gamba And Harpsichord No. 2 In D, BWV 1028: 1. Adagio
Twenty-Four Preludes, Op. 34: No. 21 in F flat major - Allegretto poco moderato
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The Constant Music Master - Instalment 2 / 11. Duetto à Violino ò Flauto e Viola pomposa In G Maj.: 1. Dolce
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5 Easy Pieces for Piano Duet: 4. Napolitana
Duo for Violin and Cello in E-Flat Major, Unv 8 (Fragment)
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12 Movements from Romeo and Juliet, Op. 64: IV. Quarrel (Transcription For 2 Pianos By Sergei Babayan)
Orgelbüchlein, BWV 599-644: Herr Gott, nun schleuss den Himmel auf, BWV 617 (Arr. Demenga for Cello & Piano)
Trois morceaux en forme de poire: Prolongation du même. Au pas
Lieder ohne Worte VII, Op. 85: II. Allegro agitato (Arr. Ottensamer for Clarinet & Piano)
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16 Waltzes, Op. 39: No. 15 in A-Flat Major
36 Originaltänze (German Dances) for Piano, Op. 9: German Dance No. 12 (D 365, No. 11)
Trois morceaux en forme de poire: Redite
36 Originaltänze (German Dances) for Piano, Op. 9: German Dance No. 14 (D 365, No. 9)
Ma mère l'oye, M.60 - For Piano Duet, M.60: 1. Pavane de la Belle au bois dormant
4 Ballads and Romances, Op. 75: No. 4, Walpurgisnacht
Twenty-Four Preludes, Op. 34: No. 10 In C Sharp Minor
Flute Sonata in E-Flat Major, BWV 1031: II. Siciliano
Lieder ohne Worte VII, Op. 85: VI. Allegretto con moto. MWV U155 (Arr. Ottensamer for Clarinet & Piano)
16 Waltzes, Op. 39 - For Piano Duet: 8. in B flat
Sonata For Piano And Violin In G, K. 27: 1. Andante poco agadio
Sonata for Horn and Piano in F, Op. 17: 2. Poco adagio, quasi andante
Partita "Polonaise" in A major for two guitars: Le Pris
Partita "Polonaise" in A major for two guitars: Combattans
Partita "Polonaise" in A major for two guitars: Rigidon
Hum - Für 5 Oder 6 Stimmen Und Live-Elektronik
Teile dich Nacht - Für gemischten Chor und Frauenstimme
Die Seele muss vom Reittier steigen… - Kammerkonzert für Violoncello-Solo, Baryton-Solo, Kontratenor und 37 Instrumentalisten
Ecoute - Für 5 Stimmen und Licht-Installation
Differenz / Wiederholung 7 - Für Großes Orchester und Loop-Generator
The Ecstasy of St. Theresa (Homage to Bernini) - Für 9 Stimmen Und Live-Elektronik
Vollicht aust es sa, III - Für 3 Sprecher, 2 Schlagzeuger, Flöten, 4 Filme und Lautsprecher
Maim Zarim, Maim Gnuvim - Für Großes Orchester, Tubax, Solisten-Quintett Und Live-Elektronik
Phonautograph - Für 4 Frauenstimmen, Countertenor, Posaune, 4 Plattenspieler Und Live-Elektronik
Le tombeau de Couperin, M. 68: I. Prélude
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Sonatine, M. 40: II. Mouvement de menuet
Le tombeau de Couperin, M. 68: II. Fugue
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Le tombeau de Couperin, M. 68: III. Forlane
Le tombeau de Couperin, M. 68: IV. Rigaudon
Le tombeau de Couperin, M. 68: V. Menuet
Le tombeau de Couperin, M. 68: VI. Toccata
Valses nobles et sentimentales, M. 61: I. Modéré, très franc
Valses nobles et sentimentales, M. 61: II. Assez lent, avec une expression intense
Valses nobles et sentimentales, M. 61: III. Modéré
Valses nobles et sentimentales, M. 61: IV. Assez animé
Valses nobles et sentimentales, M. 61: V. Presque lent, dans un sentiment intime
Valses nobles et sentimentales, M. 61: VI. Vif
Valses nobles et sentimentales, M. 61: VII. Moins vif
Valses nobles et sentimentales, M. 61: VIII. Epilogue. Lent
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Miroirs, M. 43: No. 3, Une barque sur l'océan
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Miroirs, M. 43: No. 4, Alborada del gracioso
Miroirs, M. 43: No. 5, La vallée des cloches
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La valse, M. 72 (Version for Piano Duet)
Symphonic Dances, Op. 45: 1. Non allegro
Symphonic Dances, Op. 45: 2. Andante con moto (Tempo di valse)
Piano Trio No. 2 in E Minor, Op. 67: I. Andante - Live
Symphonic Dances, Op. 45: 3. Lento assai - Allegro vivace
Piano Trio No. 2 in E Minor, Op. 67: II. Allegro non troppo - Live
The Nutcracker Suite, Op. 71a (Arr. Economou for 2 Pianos): I. Miniature Overture
Piano Trio No. 2 in E Minor, Op. 67: III. Largo - Live
The Nutcracker Suite, Op. 71a (Arr. Economou for 2 Pianos): IIa. March
Piano Trio No. 2 in E Minor, Op. 67: IV. Allegretto - Live
Fantasiestücke, Op. 88: I. Romanze (Nicht schnell, mit innigem Ausdruck)
The Nutcracker Suite, Op. 71a (Arr. Economou for 2 Pianos): IIb. Dance of the Sugar Plum Fairy
Piano Trio in A Minor, Op. 50: I. Pezzo elegiaco. Moderato assai – Allegro giusto - Live
Fantasiestücke, Op. 88: II. Humoreske (Lebhaft)
The Nutcracker Suite, Op. 71a (Arr. Economou for 2 Pianos): IIc. Russian Dance (Trepak)
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: a. Theme. Andante con moto - Live
The Nutcracker Suite, Op. 71a (Arr. Economou for 2 Pianos): IId. Arabian Dance (Coffee)
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: b. Var. 1. L'istesso tempo - Live
The Nutcracker Suite, Op. 71a (Arr. Economou for 2 Pianos): IIe. Chinese Dance (Tea)
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: c. Var. 2. Più mosso - Live
The Nutcracker Suite, Op. 71a (Arr. Economou for 2 Pianos): IIf. Dance of the Reed-Pipes
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: d. Var. 3. Allegro moderato - Live
The Nutcracker Suite, Op. 71a (Arr. Economou for 2 Pianos): III. Waltz of the Flowers
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: e. Var. 4. L'istesso tempo - Live
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: f. Var. 5. L'istesso tempo - Live
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: g. Var. 6. Tempo di valse - Live
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: h. Var. 7. Allegro moderato - Live
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: i. Var. 8. Fuga. Allegro moderato - Live
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: j. Var. 9. Andante flebile, ma non tanto - Live
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: k. Var. 10. Tempo di mazurka - Live
Piano Trio in A Minor, Op. 50: IIa. Tema con Variazioni: l. Var. 11. Moderato - Live
Piano Trio in A Minor, Op. 50: IIb. Variazione finale e coda: a. Allegro risoluto e con fuoco - Live
Piano Trio in A Minor, Op. 50: IIb. Variazione finale e coda: b. Coda. Lugubre. Andante con moto - Live
Martha Argerich - Solo Works & Works for Piano Duo
Kinderszenen, Op. 15: I. Von fremden Ländern und Menschen
Piano Sonata in B Minor, S. 178: I. Lento assai – Allegro energico
Kinderszenen, Op. 15: II. Kuriose Geschichte
Piano Sonata in B Minor, S. 178: IIa. Grandioso
Piano Sonata in B Minor, S. 178: IIb. Cantando espressivo –
Kinderszenen, Op. 15: IV. Bittendes Kind
Piano Sonata in B Minor, S. 178: IIc. Pesante – Recit.
Piano Sonata in B Minor, S. 178: IIIa. Andante sostenuto –
Kinderszenen, Op. 15: VI. Wichtige Begebenheit
Piano Sonata in B Minor, S. 178: IIIb. Quasi adagio
Piano Sonata in B Minor, S. 178: IVa. Allegro energico
Piano Sonata in B Minor, S. 178: IVb. Più mosso
Kinderszenen, Op. 15: IX. Ritter vom Steckenpferd
Piano Sonata in B Minor, S. 178: IVc. Cantando espressivo senza slentare
Piano Sonata in B Minor, S. 178: IVd. Stretta quasi Presto – IVe. Presto – Prestissimo
Kinderszenen, Op. 15: XI. Fürchtenmachen
Piano Sonata in B Minor, S. 178: V. Andante sostenuto – Allegro moderato – Lento assai
Kinderszenen, Op. 15: XII. Kind im Einschlummern
Hungarian Rhapsody No. 6 in D-Flat Major, S. 244/6
Kinderszenen, Op. 15: XIII. Der Dichter spricht
2 Rhapsodies, Op. 79: No. 1 in B Minor. Agitato
Piano Sonata No. 2 in G Minor, Op. 22: I. So rasch wie möglich
Piano Sonata No. 2 in G Minor, Op. 22: II. Andantino. Getragen
Piano Sonata No. 2 in G Minor, Op. 22: III. Scherzo. Sehr rasch und markiert
Piano Sonata No. 2 in G Minor, Op. 22: IV. Rondo. Presto
Philharmonisches Kammerorchester München
Overture on Hebrew Themes, Op. 34 bis - Arr. for Clarinet, Piano & String Orchestra by Michael Helmrath
Blessed Are Your Sons - Arr. for Clarinet & String Orchestra by Roberto Pansera
Misa Criolla - Arr. for Bass Clarinet, Clarinet, Percussion, Harp, Harpsichord & String Orchestra by Roberto Pansera & Michael Helmrath
Péchés de vieillesse, Vol. 3 "Morceaux réservés" (Excerpts): No. 7, Preghiera
Péchés de vieillesse, Vol. 3 "Morceaux réservés" (Excerpts): No. 1, Quelques mesures de chant funèbre à mon pauvre ami Meyerbeer
Péchés de vieillesse, Vol. 2 "Album français" (Excerpts): No. 6, La notte del Santo Natale
Péchés de vieillesse, Vol. 2 "Album français" (Excerpts): No. 1, Ottettino "Toast pour le nouvel an"
Péchés de vieillesse, Vol. 2 "Album français" (Excerpts): No. 12, Choeur de chasseurs démocrates
Péchés de vieillesse, Vol. 1 "Album italiano": No. 1, Quartettino "I gondolieri" (Arr. C. Schmidt for Vocal Ensemble)
Les soirées musicales: No. 5, L'invito (Arr. C. Schmidt for Vocal Ensemble)
Les soirées musicales: No. 8, La danza (Arr. G. Mühling for Vocal Ensemble)
Péchés de vieillesse, Vol. 2 "Album français": No. 4, Un sou (Arr. A. Brandl for Vocal Ensemble)