thumb|upright=0.9|Leslie Parnas Leslie Parnas (November 11, 1931 – February 1, 2022) was an American classical cellist. A prize winner at several international music competitions, he appeared as a sol
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2776fa2731358cc4eb0e51eb2b367116d7f167c64c818392a0d8b518d7fe2e. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b932733-7dc8-4254-8962-b5a0c5cf33c9.json and https://artists.proofprofile.net/proofs/artist/3b932733-7dc8-4254-8962-b5a0c5cf33c9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Ysaÿe, Martinů & Saint-Saëns: Works for Cello
Brahms, Mendelssohn & Beethoven: Works for Cello
Brahms, Bloch & Tchaikovsky: Violin & Cello Works (Live)
Porpora, Debussy et Shostakovich: Sonates pour violoncelle et piano (Stereo Version)
Porpora, Debussy & Shostakovich: Sonates pour violoncelle et piano (Mono Version)
Schubert: Piano Quintet in A Major, D. 667 "Trout" - Mozart: Clarinet Quintet in A Major, K. 581
Piano Quintet in A Major, D. 667, Op. 114 "Trout": I. Allegro vivace
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
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Piano Quintet in A Major, D. 667, Op. 114 "Trout": IV. Tema con variazioni. Andantino
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Piano Quintet in A Major, D. 667, Op. 114 "Trout": V. Finale. Allegro giusto
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Clarinet Quintet in A Major, K. 581: I. Allegro
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Clarinet Quintet in A Major, K. 581: II. Larghetto
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Clarinet Quintet in A Major, K. 581: IV. Allegro con variazioni
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Piano Sonata No. 20 in A Major, D. 959: II. Andantino
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Piano Trio in E-Flat Major, D. 929 (Op.100): II. Andante con moto
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Schubert: Piano Quintet in A major, D. 667 "Trout Quintet" & Mozart: Clarinet Quintet in A Major, K. 581
Les Contes d'Hoffmann / Act 3: Barcarolle "Belle nuit, ô nuit d'amour"
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The Ballad of Baby Doe / Act 1: Willow, where we met together
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The Ballad of Baby Doe / Act 1: Warm as the autumn light
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Mendelssohn, Grieg & Saint-Saëns: Cello Sonatas
Richard Strauss & Dohnányi: Cello Sonatas
Juilliard Quartet, Vol. 3: Live at Library of Congress – Brahms Sextets
Brahms: Double Concerto - Bloch: Schelomo - Tchaikovsky: Variations on a Rococo Theme (Live)
Beethoven: Concerto for Piano, Violin, Cello And Orchestra, Op. 56 "Triple Concerto" (2017 Remastered Version)
Bach: "Double" Concerto for Two Violins in D minor; Violin Concertos Nos. 1 & 2 [Expanded Edition]
Concerto for 2 Violins in D Minor, BWV 1043: I. Vivace
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Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
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Concerto for 2 Violins in D Minor, BWV 1043: III. Allegro
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Violin Concerto in A Minor, BWV 1041: I. Allegro
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Violin Concerto in A Minor, BWV 1041: II. Andante
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Violin Concerto in A Minor, BWV 1041: III. Allegro assai
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Violin Concerto in E Major, BWV 1042: I. Allegro
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Violin Concerto in E Major, BWV 1042: II. Adagio
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Violin Concerto in E Major, BWV 1042: III. Allegro assai
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Trio Sonata in G Major, BWV 1038: I. Largo
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Trio Sonata in G Major, BWV 1038: II. Vivace
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Trio Sonata in G Major, BWV 1038: III. Adagio
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Trio Sonata in G Major, BWV 1038: IV. Presto
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Trio Sonatas of Telemann & The Bach Family
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Trio No. 3 in A Minor, Fk. 49: I. Allegro
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Trio No. 3 in A Minor, Fk. 49: II. Larghetto
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Trio in C Major for Flute, Violin & Cello, W.Y B47, T. 317/2: I. Allegretto
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Trio in C Major for Flute, Violin & Cello, W.Y B47, T. 317/2: II. Adagio
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Trio in C Major for Flute, Violin & Cello, W.Y B47, T. 317/2: III. Allegro
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Musical Offering, Op. 6, BWV 1079: Trio Sonata for Flute, Violin and Basso continuo in C Minor: I. Largo
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Musical Offering, Op. 6, BWV 1079: Trio Sonata for Flute, Violin and Basso continuo in C Minor: II. Allegro
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Musical Offering, Op. 6, BWV 1079: Trio Sonata for Flute, Violin and Basso continuo in C Minor: III. Andante
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Musical Offering, Op. 6, BWV 1079: Trio Sonata for Flute, Violin and Basso continuo in C Minor: IV. Allegro
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Sonata for Fortepiano, Flute and Violin in C Major Wf VIII/3: I. Allegro
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Sonata for Fortepiano, Flute and Violin in C Major Wf VIII/3: II. Andante
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Sonata for Fortepiano, Flute and Violin in C Major Wf VIII/3: III. Rondo. Allegretto
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Quartet in E Minor, TWV 43:E2: I. Adagio
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Quartet in E Minor, TWV 43:E2: II. Allegro
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Quartet in E Minor, TWV 43:E2: III. Dolce
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Quartet in E Minor, TWV 43:E2: IV. Allegro
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Cello Suite No. 1 in G Major, BWV 1007: I. Prélude
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Violin Partita No. 3 in E Major, BWV 1006: III. Gavotte en rondeau
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Orchestral Suite No. 3 in D Major, BWV 1068: II. Air (On the G-String)
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Cantata BWV 140 "Wachet auf, ruft uns die Stimme": IV. Choral: Zion hört die Wächter singen
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Orchestral Suite No. 2 in B Minor, BWV 1067: Menuet and Badinerie
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Jesu, Joy of Man's Desiring from Cantata No. 147, K.
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Rudolf Serkin plays Beethoven Concertos, Sonatas & Variations
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Slavonic Dances, Op. 46, B. 83: No. 8, Furiant
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Schubert: Trout Quintet; Schumann: Piano Quintet, Op. 44 [Rudolf Serkin - The Art of Interpretation]
Mendelssohn: Symphony No. 4 in A Major, Op. 90 "Italian" & String Octet in E-Flat Major, Op. 20
Johannes Brahms: Essential Chamber Music
Mendelssohn: Octet in E-Flat for Strings - Mozart: Concertone for 2 Violins and Orchestra (Remastered)
Schubert: Quintet "La Truite", 4 Impromptus, D. 935, Musical Moments, D. 780 & Piano Sonatas
Sonatas of Johann Sebastian Bach and Sons