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 0x622e5d21a7ffa2d3baae2c676f506cb96c6f09b2268cd4ed1fbb8e56c9170cfe. 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/7e0cbf88-8f91-4654-b2c1-82cf9a2b96d4.json and https://artists.proofprofile.net/proofs/artist/7e0cbf88-8f91-4654-b2c1-82cf9a2b96d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Géza Anda and Clara Haskil play Bach and Bartók (Lucerne Festival Historic Performances Vol. 17)
Concerto for 2 Pianos and Orchestra in C Major, BWV 1061: I. - - Live
Concerto for 2 Pianos and Orchestra in C Major, BWV 1061: II. Adagio ovvero Largo - Live
Concerto for 2 Pianos and Orchestra in C Major, BWV 1061: III. Fuga. Vivace - Live
Piano Concerto No. 2, Sz. 95: I. Allegro - Live
Piano Concerto No. 2, Sz. 95: II. Adagio - Píu adagio - Presto - Live
Piano Concerto No. 2, Sz. 95: III. Allegro Molto - Live
Piano Concerto No. 3, Sz. 119: I. Allegretto - Live
Piano Concerto No. 3, Sz. 119: II. Adagio Religioso - Live
Piano Concerto No. 3, Sz. 119: III. Allegro Vivace - Live
Beethoven: Piano Concerto No. 3; Chopin: Piano Concerto No. 2
Piano Concerto No. 3 in C Minor, Op. 37: 1. Allegro con brio
Piano Concerto No. 3 in C Minor, Op. 37: 2. Largo
Piano Concerto No. 3 in C Minor, Op. 37: 3. Rondo. Allegro
Piano Concerto No. 2 in F Minor, Op. 21: 1. Maestoso
Piano Concerto No. 2 in F Minor, Op. 21: 2. Larghetto
Piano Concerto No. 2 in F Minor, Op. 21: 3. Allegro vivace
Beethoven : Piano Concerto No. 3 - Schumann : Piano Concerto In A Minor
Piano Concerto No. 3, In C Minor , Op. 37 : I. Allegro con brio
Piano Concerto No. 3, In C Minor , Op. 37 : II. Largo
Concerto No. 3, In C Minor , Op. 37 : III. Rondo. Allegro
Piano Concerto, In A Minor , Op. 54 : I. Allegro affetuoso
Piano Concerto, In A Minor , Op. 54 : II. Intermezzo. AndantIno grazioso
Piano Concerto, In A Minor , Op. 54 : III. Allegro vivace
Violin Sonata in E minor K. 304 - I. Allegro - Remastered 2021
Violin Sonata in B flat Major K. 454 - I. Largo, Allegro - Remastered 2021
Violin Sonata in E minor K. 304 - II. Tempo di menuetto - Remastered 2021
Violin Sonata in B flat Major K. 454 - II. Andante - Remastered 2021
Violin Sonata in B flat Major K. 378 - I. Allegro moderato - Remastered 2021
Violin Sonata in B flat Major K. 454 - III. Allegretto - Remastered 2021
Violin Sonata in B flat Major K. 378 - II. Andantino sostenuto e cantabile - Remastered 2021
Violin Sonata in A Major K. 526 - I. Allegro molto - Remastered 2021
Violin Sonata in B flat Major K. 378 - III. Rondo, Allegro - Remastered 2021
Violin Sonata in A Major K. 526 - II. Andante - Remastered 2021
Violin Sonata in F Major K. 376 - I. Allegro - Remastered 2021
Violin Sonata in A Major K. 526 - III. Presto - Remastered 2021
Violin Sonata in F Major K. 376 - II. Andante - Remastered 2021
Violin Sonata in F Major K. 376 - III. Rondo, Allegretto grazioso - Remastered 2021
Violin Sonata in C Major K. 301 - l. Allegro con spirito - Remastered 2021
Violin Sonata in C Major K. 301 - II. Allegro - Remastered 2021
Beethoven Sonatas for Piano & Violin No. 1, No. 4
Sonata No. 1 In D , Op . 12 No. 1 : I Allegro con brio
Sonata No. 1 In D , Op . 12 No. 1 :II Tema con variazioni
Sonata No. 1 In D , Op . 12 No. 1 III Rondo. Allegro
Sonata No. 2 In A , Op . 12 No. 2 : I Allegro vivace
Sonata No. 2 In A , Op . 12 No. 2 : II Andante piu tosto allegro
Sonata No. 2 In A , Op . 12 No. 2 : III Allegro piacevole
o Sonata No. 3 In E flat , Op . 12 No. 3 : I Allegro con spirit
Sonata No. 3 In E flat , Op . 12 No. 3 : II Adagio con molt
Sonata No. 3 In E flat , Op . 12 No. 3 : III Rondo. Allegro molto
Sonata No. 4 In A , Op . 23 : II Andante scherzoso piu allegretto
Sonata No. 4 In A , Op . 23 : III Allegro molto
Beethoven : Sonatas for Piano & Violin No. 5, No. 7
Sonata No. 5 In F Major, Op.24 Spring : I. Allegro
Sonata No. 5 In F Major, Op.24 Spring : II.Adagio molto espressivo
Sonata No. 5 In F Major, Op.24 Spring : III. Scherzo. Allegro molto
Sonata No. 5 In F Major, Op.24 Spring : IV. Rondo. Allegro ma non troppo
No. 6 In A Major, Op.30 No. 1 : I. Allegro Sonata
Sonata No. 6 In A Major, Op.30 No. 1 : II. Adagio
Sonata No. 6 In A Major, Op.30 No. 1 : III. Allegretto con variazioni
Sonata No. 7 In C Minor, Op.30 No. 2 : I. Allegro con brio
Sonata No. 7 In C Minor, Op.30 No. 2 : II. Adagio cantabile
Sonata No. 7 In C Minor, Op.30 No. 2 : III. Scherzo. Allegro
Sonata No. 7 In C Minor, Op.30 No. 2 : IV. Finale. Allegro
Sonata In C, K. 301 : I Allegro con spirito
Sonata In E minor, K. 304 : IV Tempo di menuetto
Sonata In F, K. 376 : III Rondo. Allegretto grazioso
Sonata In B Flat, K. 378 : I Allegro moderato
Sonata In B Flat, K. 378 : II Andantino sostenuto e cantabile
Sonata In B Flat, K. 378 : III Rondo. Allegro
Beethoven Sonatas for Piano & Violin No. 8, No. 10
Sonata No. 8 In G major ,Op. 30 No. 3 : I. Allegro assai
Sonata No. 8 In G major ,Op. 30 No. 3 : II. Tempo di menuetto ma molto moderato
Sonata No. 8 In G major ,Op. 30 No. 3 : III. Allegro vivace
Sonata No. 9 In A ,Op. 30 No. 3 Kreutzer : I. Adagio sostenuto Presto
Sonata No. 9 In A ,Op. 30 No. 3 Kreutzer : II. Andante con variazoni
Sonata No. 9 In A ,Op. 30 No. 3 Kreutzer : II. Var 1
Sonata No. 9 In A ,Op. 30 No. 3 Kreutzer : II. Var 2
Sonata No. 9 In A ,Op. 30 No. 3 Kreutzer : II. Var 3
Sonata No. 9 In A ,Op. 30 No. 3 Kreutzer : II. Var 4
Sonata No. 9 In A ,Op. 30 No. 3 Kreutzer : II Coda
Sonata No. 9 In A ,Op. 30 No. 3 Kreutzer : III. Finale. Presto
Sonata No. 10 In G ,Op. 96 : I. Allegro moderato
Sonata No. 10 In G ,Op. 96 : II. Adagio espressivo
Sonata No. 10 In G ,Op. 96 : III. Scherzo. Allegro
Sonata No. 10 In G ,Op. 96 : IV. Poco allegretto
Piano Concerto No. 9 in E-Flat Major, KV 271 - "Jeunehomme": I. Allegro
Piano Concerto No. 20 in D Minor, KV 466: I. Allegro
Piano Concerto No. 9 in E-Flat Major, KV 271 - "Jeunehomme": II. Andantino
Piano Concerto No. 20 in D Minor, KV 466: II. Romance
Piano Concerto No. 9 in E-Flat Major, KV 271 - "Jeunehomme": III. Rondo presto
Piano Concerto No. 20 in D Minor, KV 466: III. Rondo, Allegro assai
Piano Concerto No. 9 in E-Flat Major, KV 271 - "Jeunehomme": IV. Allegro
Piano Concerto No. 24 in C Minor, KV 491: I. Allegro
Piano Concerto No. 9 in E-Flat Major, KV 271 - "Jeunehomme": V. Andantino
Piano Concerto No. 24 in C Minor, KV 491: II. Larghetto
Piano Concerto No. 9 in E-Flat Major, KV 271 - "Jeunehomme": VI. Rondo presto
Piano Concerto No. 24 in C Minor, KV 491: III. Allegretto
Piano Concerto No. 10 E-Flat Major, K. 365: III. Rondeau (Allegro)
Piano Concerto No. 10 E-Flat Major, K. 365: I. Allegro
Piano Concerto No. 10 E-Flat Major, K. 365: II. Andante