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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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album: Piazzolla: Le Grand Tango (Musical Moments)
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-29T19:35:34Z
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-06-13T12:53:06Z
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album: The Chopin Project : Trilogy
album: The Chopin Project : The Franchomme Legacy
album: Neo Classical 2023
album: 100 Great Musical Moments
album: Alla marcia - Chamber Music
album: "December" - A Season of Piano: Chopin
album: "Classical Winter" - Chopin
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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Chopin: Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre (Arr. Franchomme for 4 Cellos)
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-30T14:36:16Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:30:09Z
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24 Préludes, Op. 28: No. 4 in E Minor (Arr. Franchomme for Cello) [Adapted for 4 Cellos by Matthias Spindler]
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3 Nocturnes, Op. 14: No. 1, Andante
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Piano Concerto No. 1 in E Minor, Op. 11: II. Larghetto (Arr. for Cello and Piano by J. Brocal and C. Thomas)
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Piano Trio in G Minor, Op. 8: III. Adagio sostenuto
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by artist: Camille Thomas
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by artist: Julien Brocal
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genre: early-romantic-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T22:27:30Z
audio: Piano Trio in G Minor, Op. 8: III. Adagio sostenuto
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24 Préludes, Op. 28: No. 15 in D-Flat Major ''Raindrop'' (Arr. Franchomme for 4 Cellos)
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by artist: Frédéric Chopin
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by artist: Wolfgang Emanuel Schmidt
by artist: Jaemin Han
by artist: Frans Helmerson
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T12:45:34Z
audio: 24 Préludes, Op. 28: No. 15 in D-Flat Major ''Raindrop'' (Arr. Franchomme for 4 Cellos)
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Waltz No. 19 in A Minor, KK IVb (Arr. for Cello and Piano by C. Thomas)
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by artist: Camille Thomas
by artist: Julien Brocal
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: Waltz No. 19 in A Minor, KK IVb (Arr. for Cello and Piano by C. Thomas)
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Piano Trio in G Minor, Op. 8: IV. Finale. Allegretto
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Piano Trio in G Minor, Op. 8: IV. Finale. Allegretto
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre (Arr. Franchomme for 4 Cellos)
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genre: classical
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T21:35:24Z
audio: Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre (Arr. Franchomme for 4 Cellos)
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Nocturnes, Op. 15: No. 1 in F Major, Andante cantabile (Arr. for Cello and Piano by A. Franchomme)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T11:07:37Z
audio: Nocturnes, Op. 15: No. 1 in F Major, Andante cantabile (Arr. for Cello and Piano by A. Franchomme)
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Cello Sonata in G Minor, Op. 65: I. Allegro moderato
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  date published: 2026-07-30T05:15:54Z
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3 Nocturnes, Op. 15: No. 1, Larghetto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Nocturne in C Minor, Andante sostenuto, B. 108 (Arr. for Cello and Piano by C. Thomas)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Nocturne in C Minor, Andante sostenuto, B. 108 (Arr. for Cello and Piano by C. Thomas)
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Cello Sonata in G Minor, Op. 65: II. Scherzo. Allegro con brio
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:19:15Z
audio: Cello Sonata in G Minor, Op. 65: II. Scherzo. Allegro con brio
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24 Préludes, Op. 28: No. 13 in F-Sharp Major (Arr. Franchomme for 4 Cellos)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T08:26:41Z
audio: 24 Préludes, Op. 28: No. 13 in F-Sharp Major (Arr. Franchomme for 4 Cellos)
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17 Polish Songs, Op. posth. 74: No. 2, "Spring" (Wiosna), B.116 (Arr. for Cello and Piano by C. Thomas)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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Cello Sonata in G Minor, Op. 65: III. Largo
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12 Etudes for Cello, Op. 35: No. 11, Adagio espressivo
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24 Préludes, Op. 28: No. 15 in D-Flat Major, ''Raindrop'' (Arr. for Cello and Piano by A. Franchomme)
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Cello Sonata in G Minor, Op. 65: IV. Finale. Allegro
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12 Etudes for Cello, Op. 35: No. 7, Andante con moto
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4 Mazurkas, Op. 68: No. 2 in A Minor, Lento (Arr. for Cello and Piano by C. Thomas)
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Introduction and Polonaise, Op. 3: I. Introduction. Largo
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Air russe varié for Violoncello and String Quartet, Op. 32: I. Poco lento
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12 Études, Op. 10: No. 6 in E-Flat Minor (Arr. for Cello and Piano by A. Glazunov)
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subject of: OpenTimestamps Proof of Existence
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Introduction and Polonaise, Op. 3: II. Alla polacca. Allegro con spirito
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T08:26:41Z
audio: Introduction and Polonaise, Op. 3: II. Alla polacca. Allegro con spirito
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Air russe varié for Violoncello and String Quartet, Op. 32: II. Andante sostenuto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T09:09:19Z
audio: Air russe varié for Violoncello and String Quartet, Op. 32: II. Andante sostenuto
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12 Études, Op. 25: No. 7 in C-Sharp Minor (Arr. for Cello and Piano by A. Glazunov)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T19:35:34Z
audio: 12 Études, Op. 25: No. 7 in C-Sharp Minor (Arr. for Cello and Piano by A. Glazunov)
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Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: I. Introduction. Largo
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subject of: OpenTimestamps Proof of Existence
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Air russe varié for Violoncello and String Quartet, Op. 32: III. Allegro moderato
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  date published: 2026-07-08T03:20:19Z
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Nocturnes, Op. 27: No. 1 in C-Sharp Minor, Larghetto (Arr. for Cello and Piano by C. Thomas)
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by artist: Camille Thomas
by artist: Julien Brocal
in album: The Chopin Project : Trilogy
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genre: classical
genre: early-romantic-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T19:35:34Z
audio: Nocturnes, Op. 27: No. 1 in C-Sharp Minor, Larghetto (Arr. for Cello and Piano by C. Thomas)
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Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: II. Allegretto
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by artist: Frédéric Chopin
by artist: Auguste Franchomme
by artist: Camille Thomas
by artist: Lucas Debargue
in album: The Chopin Project : Trilogy
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genre: classical
genre: early-romantic-era
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: II. Allegretto
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Air russe varié for Violoncello and String Quartet, Op. 32: IV. Lento
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by artist: Auguste Franchomme
by artist: Camille Thomas
by artist: Wolfgang Emanuel Schmidt
by artist: Indira Koch
by artist: Friedemann Eichhorn
by artist: Alexia Eichhorn
in album: The Chopin Project : Trilogy
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T16:09:41Z
audio: Air russe varié for Violoncello and String Quartet, Op. 32: IV. Lento
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3 Waltzes, Op. 34: No. 2. in A Minor, Lento (Arr. for Cello and Piano by A. Franchomme)
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by artist: Frédéric Chopin
by artist: Camille Thomas
by artist: Julien Brocal
in album: The Chopin Project : Trilogy
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genre: classical
genre: early-romantic-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T19:35:34Z
audio: 3 Waltzes, Op. 34: No. 2. in A Minor, Lento (Arr. for Cello and Piano by A. Franchomme)
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Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: III. Andate cantabile
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by artist: Camille Thomas
by artist: Lucas Debargue
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genre: classical
genre: early-romantic-era
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Grand Duo concertant sur des thèmes de 'Robert le Diable' de Meyerbeer, B. 70: III. Andate cantabile
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Air russe varié for Violoncello and String Quartet, Op. 32: V. Allegro moderato
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by artist: Friedemann Eichhorn
by artist: Alexia Eichhorn
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Air russe varié for Violoncello and String Quartet, Op. 32: V. Allegro moderato
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Nocturne in E Minor, Op. posth. 72 No. 1 (Arr. for Cello and Piano by S. Taneyev)
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by artist: Camille Thomas
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genre: classical
genre: early-romantic-era
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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24 Préludes, Op. 28: No. 9 in E Major (Arr. Franchomme for 4 Cellos)
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4 Mazurkas, Op. 67: No. 4 in A Minor, Moderato animato (Arr. F. Kreisler) [Adapted for Cello and Piano by C. Thomas]
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24 Préludes, Op. 28: No. 20 in C Minor (Arr. Franchomme for 4 Cellos)
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24 Preludes, Op. 28: No. 6 in B Minor, Lento assai (Arr. for Cello and Piano by A. Franchomme)
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Cello Sonata in G Minor, Op. 65: III. Largo "Souvenir" (Arr. Schmidt for Cello and String Quartet)
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Jane B. (After Chopin's Prelude No. 4 in E minor, Op. 28) [Arr. for Cello and Piano by J. Brocal and E. Daems]
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The Chopin Project : The Franchomme Legacy
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track: Cello Sonata in G Minor, Op. 65: III. Largo "Souvenir" (Arr. Schmidt for Cello and String Quartet)

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24 Préludes, Op. 28: No. 15 in D-Flat Major ''Raindrop'' (Arr. Franchomme for 4 Cellos)
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre (Arr. Franchomme for 4 Cellos)
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3 Nocturnes, Op. 15: No. 1, Larghetto
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24 Préludes, Op. 28: No. 13 in F-Sharp Major (Arr. Franchomme for 4 Cellos)
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12 Etudes for Cello, Op. 35: No. 11, Adagio espressivo
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12 Etudes for Cello, Op. 35: No. 7, Andante con moto
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Air russe varié for Violoncello and String Quartet, Op. 32: I. Poco lento
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
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Air russe varié for Violoncello and String Quartet, Op. 32: II. Andante sostenuto
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Air russe varié for Violoncello and String Quartet, Op. 32: III. Allegro moderato
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Air russe varié for Violoncello and String Quartet, Op. 32: IV. Lento
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Cello Sonata in G Minor, Op. 65: III. Largo "Souvenir" (Arr. Schmidt for Cello and String Quartet)
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Neo Classical 2023
type: MusicAlbum
date published: 2023-10-11
track: On the Nature of Daylight
  type: MusicRecording
  duration: PT6M11S
  duration ms: 371746
  explicit: false
  by artist: Max Richter
  by artist: Louisa Fuller
  by artist: Natalia Bonner
  by artist: John Metcalfe
  by artist: Philip Sheppard
  by artist: Chris Worsey
  in album: Neo Classical 2023
    type: MusicAlbum
    date published: 2023-10-11
  genre: ambient
  genre: classical
  genre: minimalism
  genre: neoclassical
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  additional property: CopyrightID
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c2980e98a9d2dc06f5a1f57c8ac39911ed800abda21d63f07e372548c87a6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBDCA0300279.
    date published: 2026-07-08T03:20:19Z
  audio: On the Nature of Daylight
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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    additional property: Key Name
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track: Experience - Solo Piano
  type: MusicRecording
  duration: PT5M7S
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  in album: Neo Classical 2023
    type: MusicAlbum
    date published: 2023-10-11
  genre: classical
  genre: contemporary-classical
  genre: neoclassical
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  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64f7e7c720202ed35139a899774d5c32ba7ab10a956021afd9babdb452e5142. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB282100051.
    date published: 2026-07-08T03:20:19Z
  audio: Experience - Solo Piano
    type: AudioObject
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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track: Parliament Of Owls
  type: MusicRecording
  duration: PT2M29S
  duration ms: 149751
  explicit: false
  by artist: Agnes Obel
  in album: Neo Classical 2023
    type: MusicAlbum
    date published: 2023-10-11
  genre: chamber-pop
  isrc code: DEN961902441
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    type: PropertyValue
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Parliament Of Owls
track: November
track: Test Drive - From How To Train Your Dragon Music From The Motion Picture

CopyrightChainExplorerURL
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value: https://explorer.copyrightchains.com/tx/0x5d49a8528e6bbc1abd806577b7d5681fc7ed44fbacc3c39067a86708321c338d

OTSHash
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OTSBitcoinBlock
type: PropertyValue
value: 957118

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957118

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961902441

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:20:19Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d49a8528e6bbc1abd806577b7d5681fc7ed44fbacc3c39067a86708321c338d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961902441.
date published: 2026-07-08T03:20:19Z

Parliament Of Owls
type: AudioObject
additional property: Tempo (BPM)
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additional property: Musical Key
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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additional property: Danceability
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additional property: Energy
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additional property: Speechiness
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additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
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additional property: Valence (Positivity)
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additional property: Loudness (dB)
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additional property: Key Name
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additional property: Mode Name
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November
type: MusicRecording
duration: PT6M8S
duration ms: 368098
explicit: false
by artist: Max Richter
by artist: Mari Samuelsen
by artist: Konzerthausorchester Berlin
by artist: Jonathan Stockhammer
in album: Neo Classical 2023
  type: MusicAlbum
  date published: 2023-10-11
genre: ambient
genre: classical
genre: minimalism
genre: neoclassical
isrc code: DEN961900600
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002f31bdf7e674d1c661c3f0fa85b8d82a0880df0d1dd6ea7ce01c285125cdec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900600.
  date published: 2026-07-08T03:20:19Z
audio: November
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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Test Drive - From How To Train Your Dragon Music From The Motion Picture
type: MusicRecording
duration: PT2M36S
duration ms: 156306
explicit: false
by artist: John Powell
by artist: Gavin Greenaway
in album: Neo Classical 2023
  type: MusicAlbum
  date published: 2023-10-11
genre: soundtrack
genre: british-soundtrack
genre: orchestral-soundtrack
isrc code: US3M51001211
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53f1fc247554fb4ac22ae0272298a9ed96b821c4924b7c1900eaf1f78298399. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3M51001211.
  date published: 2026-07-08T03:20:19Z
audio: Test Drive - From How To Train Your Dragon Music From The Motion Picture
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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100 Great Musical Moments
type: MusicAlbum
date published: 2024-09-06
track: 12 Etudes, Op. 25: No. 1 in A-Flat Major "Aeolian Harp"
  type: MusicRecording
  duration: PT2M51S
  duration ms: 171600
  explicit: false
  by artist: Frédéric Chopin
  by artist: Daniel Barenboim
  in album: 100 Great Musical Moments
    type: MusicAlbum
    date published: 2024-09-06
  genre: classical
  genre: early-romantic-era
  genre: polish-classical
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  additional property: CopyrightID
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  additional property: CopyrightRegisteredAt
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b4d2d51267fba66e1643cdb9d2bbf10ddea0d0f4a6d2f8196d676d6479b6ac. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962000310.
    date published: 2026-07-31T15:20:15Z
  audio: 12 Etudes, Op. 25: No. 1 in A-Flat Major "Aeolian Harp"
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    additional property: Mode (Major/Minor)
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    additional property: Danceability
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    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Valence (Positivity)
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track: 6 Moments musicaux, D. 780: No. 3 in F Minor. Allegro moderato
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  by artist: Seong-Jin Cho
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
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Isang Yun, Schumann
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