1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 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. 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 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
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Saint-Saëns: Works for Violin & Orchestra
Saint-Saëns: Works for Cello & Orchestra
Cello Concerto No. 2 in D Minor, Op. 119: II. Allegro non troppo - Cadenza - Molto allegro
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Brahms: Violin Concerto, Op. 77 & Double Concerto, Op. 102
Violin Concerto in D Major, Op. 77: I. Allegro non troppo
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Violin Concerto in D Major, Op. 77: II. Adagio
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Violin Concerto in D Major, Op. 77: III. Allegro giocoso, ma non troppo vivace
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Double Concerto in A Minor, Op. 102: I. Allegro
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Double Concerto in A Minor, Op. 102: II. Andante
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Double Concerto in A Minor, Op. 102: III. Vivace non troppo
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Mendelssohn & Penderecki: Sextets (Live)
The Essential ORF Vienna Radio Symphony Orchestra
Cello Concerto in E Minor, Op. 85: I. Adagio - Moderato
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Cello Concerto in E Minor, Op. 85: III. Adagio
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Schumann: Cello Concerto and Works for Cello & Piano
10 Chorale Preludes, BV B 27 (Excerpts): No. 2, Wachet auf, ruft uns die Stimme [After J.S. Bach's BWV 645]
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Rhapsody on a Theme of Paganini (Arr. F. Kreisler for violin and piano)
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Carnival of the Animals, R. 125: XIII. The Swan (Arr. P. Vidal for Cello & Orchestra)
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Consolations, S. 172 "6 Pensées poétiques": No. 3, Lento placido
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Pavane, Op. 50 (Arr. H. Busser for Piano Trio)
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Suite bergamasque, L. 75: III. Clair de lune (Featured in "Man on Fire")
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Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
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6 Klavierstücke, Op. 118: No. 2, Intermezzo in A Major. Andante teneramente
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III. Nicht schnell (Re-Orchestrated by G. Mahler)
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio cantabile
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3 Visions: No. 2, Summerland (Version for Violin & Orchestra)
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Sicilienne in E-Flat Major (Arr. T. Miteva for Cello & Chamber Orchestra)
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Suite Veneziana in A Minor, Op. 18: II. Barcarola
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For Children, Vol. 1, Sz. 42 (Excerpts): No. 26, Dance with Me. Andante [Transcr. F. Ránki] [1945 Radio Version]
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Prelude in D-Flat Major, VL 253 (Arr. J. Daunytė for Harp)
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Partita No. 7 in C Major (Arr. G. Buscemi for Guitar): II. Andante
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Harp Quintet in C Minor, AV 24: II. Adagio
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Piano Trio in F Major, Hob. XV:39 "Sonata IV": II. Andante
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Violin Sonata in G Minor, H. 542.5 (Attrib. J.S. Bach's BWV 1020) [Arr. T. Hoppstock for Flute & Guitar]: II. Adagio
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Keyboard Sonata in E-Flat Major, Op. 1 No. 1: II. Tempo di minuetto
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Orchestral Suite No. 4, Op. 61, TH 34 "Mozartiana": III. Preghiera
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Bagatelle No. 25 in A Minor, WoO 59 "Für Elise"
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Chiquilín de Bachín (Arr. V. Coves for Guitar)
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Herz und Mund und Tat und Leben, BWV 147, Pt. 2: No. 10, Jesus bleibet meine Freude (Arr. M. Hess for Piano)
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5 Lieder, Op. 49: No. 4, Wiegenlied (Arr. K.H. Schütz for Flute & Piano)
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Silhouettes d'enfants, Op. 43: No. 4, Barcarolle
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Suite antique (Version for Guitar) [Excerpts]: I. Prélude
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Samson et Dalila, Op. 47, R. 288: Printemps qui commence (Version for Violin & Piano)
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Symphony in A Major, Op. 16 No. 2: II. Adagio
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La fiancée du roi de Garbe, S. 49 (Excerpts): Act III Mélodrame
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Flute Sonata in E-Flat Major, BWV 1031: II. Siciliano (Arr. D. Sosin for flute and harp)
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Scenes from Childhood, Op. 15: VII. Träumerei
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Symphony in G Major, Op. 11 No. 1: II. Andante
Joseph Boulogne Chevalier de Saint-Georges
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5 Lieder, Op. 105 (Excerpts Arr. K.H. Schütz for Flute & Piano): No. 1, Wie Melodien zieht es mir
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6 Bagatelles, Op. 126: No. 5 in G Major: Quasi allegretto
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Was mir behagt, ist nur die muntre Jagd, BWV 208 "Jagdkantate": No. 9, Schafe können sicher weiden (Arr. E. Patri for Piano)
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3 Songs, Op. 7, No. 1. Après un rêve: 3 Songs, Op. 7: No. 1, Après un rêve (Arr. For cello and piano)
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Spiegel im Spiegel (Version for Violin and Piano)
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Schwanengesang, S. 560: Schubert - Schwanengesang, S. 560/R. 245: No. 7, Standchen (Leise flehen meine Lieder) [After F. Schubert]
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Chefs d'oeuvre de la musique classique française
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Cinderella, Op. 87, Act II: Waltz-Coda (arr. M. Rostropovich)
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Peer Gynt, Op. 23: No. 15, Prelude. Morning Mood
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The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": II. Largo
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5 Bagatelles, Op. 23a (Arr. L. Ashmore for Clarinet & Strings): No. 3, Carol. Andante semplice
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Cello Suite No. 1 in G Major, BWV 1007: IV. Sarabande
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2 Dialogues with Postscript (Version for Piano & String Orchestra): No. 3, Morning Serenade
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Woodland Sketches, Op. 51: No. 3: At an Old Trysting Place
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3 Elegische Stücke, Op. 106: I. No. 1, Elegie
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Symphony No. 3 in C Major, Op. 21: III. Allegretto Moderato
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Andersen Fairy Tales Suite: I. The Rose-Tree
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Le bourgeois gentilhomme: Chaconne des Scaramouches, Frivelins et Arlequins
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Sea-Murmurs (Arr. J. Heifetz for Cello & Piano)
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Prelude in D-Flat Major, VL 187 (Arr. J. Daunytė for Harp)
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No. 10, Pour lier et soutenir le chant dans la main droite. Andante espressivo
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Symphony No. 1 in E Major: II. Andantino
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5 Stücke im Volkston, Op. 102: No. 2, Langsam
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Leaves from a Child's Sketchbook: In the Meadows
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6 Quartetto concertans, No. 1 in B-Flat Major: II. Gratioso
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4 Short Pieces for Violin & Piano, H. 104: No. 2, Spring Song (Version for Cello & Piano)
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Lyric Pieces, Book 1, Op. 12: No. 1, Arietta
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Suite de danzas criollas, Op. 15: I. Adagietto pianissimo (Arr. S. Cohen)
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Cello Suite No. 4 in E-Flat Major, BWV 1010: I. Prélude (Arr. J. McFadden for Guitar)
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Orphée et Eurydice, Act II, Scene 2: Ballo
The Drottningholm Court Theatre Orchestra
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Carnival of the Animals, R. 125: XIII. The Swan
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3 Romanzen, Op. 22: No. 1, Andante molto (Arr. For cello and piano)
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Mélancolie, Op. 23 (Version for 2 Guitars)
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2 Pieces for Strings from Henry V: No. 2, Touch Her Soft Lips and Part
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Viel Lärmen um Nichts, Op. 11, Act III Scene 1: Intermezzo
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Clarinet Concerto No. 1 in C Minor, Op. 26: II. Adagio
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The Macau Bride Ballet Suite, Op. 34: IV. The First Glance
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Triakontameron: No. 11, Alt-Wien (Arr. J. Heifetz for Violin & Piano)
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Valses poéticos: No. 3, Tempo de Vals lento (Arr. P. Breiner for guitar and orchestra)
Polish National Radio Symphony Orchestra
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Chanson de nuit et Chanson de matin, Op. 15: No. 2, Chanson de matin
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Petite suite de concert, Op. 77: III. Un Sonnet d'Amour
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The Mermaid Ballet Suite: III. Waterweed (Version for piano)
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Orquesta Juvenil Universitaria Eduardo Mata
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3 Latin American Sketches: No. 2, Paisaje Mexicano
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Prokofiev, Shostakovich & Kissin: Works for Cello & Piano
Beethoven: Complete Works for Cello & Piano, Vol. 2
Cello Sonata No. 3 in A Major, Op. 69: I. Allegro ma non tanto
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Cello Sonata No. 3 in A Major, Op. 69: II. Scherzo. Allegro molto
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12 Variations on Handel's "See the Conqu'ring Hero Comes", WoO 45: Theme. Allegretto
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12 Variations on Handel's "See the Conqu'ring Hero Comes", WoO 45: Var. 11, Adagio
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Serenade in C Major, Op. 10: IV. Tema con variazioni
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Beethoven: Complete Works for Cello & Piano, Vol. 1
Cello Sonata No. 1 in F Major, Op. 5 No. 1: I. Adagio sostenuto - II. Allegro
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12 Variations on "Ein Mädchen oder Weibchen", Op. 66: Var. 2
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12 Variations on "Ein Mädchen oder Weibchen", Op. 66: Var. 4
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12 Variations on "Ein Mädchen oder Weibchen", Op. 66: Var. 12, Allegro
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7 Variations on "Bei Männern, welche Liebe fühlen", WoO 46: Var. 1
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7 Variations on "Bei Männern, welche Liebe fühlen", WoO 46: Var. 2
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7 Variations on "Bei Männern, welche Liebe fühlen", WoO 46: Var. 4
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7 Variations on "Bei Männern, welche Liebe fühlen", WoO 46: Var. 6, Adagio
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7 Variations on "Bei Männern, welche Liebe fühlen", WoO 46: Var. 7, Allegro ma non troppo
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Cello Sonata in C-Sharp Minor, Op. 134: I. Andante (Completed by V. Blok)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99511fa34fb07974479fbc2ba4a325f047f2d4671061a95dcd3eec3a7ee39b53. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220855 — a six-check JSON result.
The Nutcracker, Op. 71, TH 14, Act II: Waltz of the Flowers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc519aaec8a8eca24e5c7523c52a17ce2260b23f8aa04c4fa7d3a7c06f517cffe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199339802 — a six-check JSON result.