thumbnail|right|300px|Album cover for Wilhelm Kempff's recording of Beethoven Piano Sonatas on DG 139 935 (1965), which received the Grand Prix du Disque Wilhelm Walter Friedrich Kempff (25 November 1
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9602cb348516e8da064a5b33a6518974d8d5eaf024fdc2bf9468e302cb5d67. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14692748-b7df-4181-8405-c6085b26493d.json and https://artists.proofprofile.net/proofs/artist/14692748-b7df-4181-8405-c6085b26493d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Coriolan, Op. 62: Coriolan Overture, Op. 62
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42171424319c333cad2cc73260def50b878fa381b0d4cd06f7a10e483df1e0c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEF056500090.
Piano Concerto No. 4 in G Major, Op. 58: I. Allegro moderato (Cadenza: Kempff)
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Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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Symphony No. 5 in C Minor, Op. 67: II. Andante con moto
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Symphony No. 9 in D Minor, Op. 125 "Choral": I. Allegro ma non troppo, un poco maestoso
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Symphony No. 5 in C Minor, Op. 67: III. Allegro
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Symphony No. 9 in D Minor, Op. 125 "Choral": II. Scherzo. Molto vivace – Presto
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": III. Rondo. Allegro
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Symphony No. 5 in C Minor, Op. 67: IV. Allegro
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Symphony No. 9 in D Minor, Op. 125 "Choral": III. Adagio molto e cantabile
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": I. Adagio sostenuto
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Symphony No. 7 in A Major, Op. 92: I. Poco sostenuto - Vivace
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Symphony No. 9 in D Minor, Op. 125 "Choral": IVa-b. Presto – Allegro assai - Recorded 1962
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": II. Allegretto
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Symphony No. 7 in A Major, Op. 92: II. Allegretto
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Symphony No. 9 in D Minor, Op. 125 "Choral": IVc-j. Presto. O Freunde nicht diese Töne – Prestissimo - Recorded 1962
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Symphony No. 7 in A Major, Op. 92: III. Presto - Assai meno presto
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Symphony No. 7 in A Major, Op. 92: IV. Allegro con brio
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Piano Sonata No. 23 in F Minor, Op. 57 "Appassionata": I. Allegro assai
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Piano Concerto No. 4 in G Major, Op. 58: II. Andante con moto
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Piano Concerto No. 4 in G Major, Op. 58: III. Rondo. Vivace
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Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro
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Schumann: Papillons; Arabeske; Piano Concerto (Wilhelm Kempff: Complete Decca Recordings, Vol. 5)
Mozart: Piano Concerto No. 9 'Jeunehomme'; Piano Concerto No. 15 (Wilhelm Kempff: Complete Decca Recordings, Vol. 3)
KEMPFF plays BEETHOVEN vol. II (Remastered 2025)
Piano Sonata No. 14 in C sharp minor, Op. 271 Moonlight I. Adagio sostenuto
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Piano Sonata No. 14 in C sharp minor, Op. 271 Moonlight III. Presto agitato
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Piano Concerto No. 5 in e Flat Major, Op. 73 Emperor I. Allegro
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Piano Concerto No. 5 in e Flat Major, Op. 73 Emperor III. Rondo Allegro
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Piano Sonata No. 29 in B-Flat Major, Op. 106 "Hammerklavier": II. Scherzo. Assai vivace
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Piano Sonata No. 29 in B-Flat Major, Op. 106 "Hammerklavier": III. Adagio sostenuto
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Piano Sonata No. 29 in B-Flat Major, Op. 106 "Hammerklavier": IV. Introduzione. Largo - Fuga. Allegro risoluto
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Wolfgang Amadeus Mozart: Piano Concertos Nos. 8 & 24, Piano Sonata No. 11, Fantasia No. 3
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Introduzione col Basso del Tema: Allegretto vivace
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Tema
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation II
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation III
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation V.
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation VI.
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation VII. Canone all'Ottava
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation VIII.
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation X.
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation XI.
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation XV. Maggiore. Largo
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6 Piano Variations in F Major, Op. 34: Variation II. (Allegro ma non troppo)
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6 Piano Variations in F Major, Op. 34: Variation III. (Allegretto)
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6 Piano Variations in F Major, Op. 34: Variation IV. (Tempo di menuetto)
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6 Bagatelles, Op. 126: 5. Quasi Allegretto
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6 Bagatelles, Op. 126: No. 6 Presto - Andante amabile e con moto
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Piano Sonata No. 13 in E-Flat Major, Op. 27, No. 1: III. Adagio con espressione
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: II. Scherzo – Più lento
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre. Lento
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: IV. Finale. Presto
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Piano Sonata No. 25 in G Major, Op. 79: I. Presto alla tedesca
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation I
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation IX.
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation XII.
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15 Variations and Fugue in E-Flat Major, Op. 35, "Eroica Variations": Variation XIII.
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Liszt: Piano Concerto No. 1; Piano Concerto No. 2 (Wilhelm Kempff: Complete Decca Recordings, Vol. 9)
Liszt: Années de pèlerinage; Légendes (Wilhelm Kempff: Complete Decca Recordings, Vol. 8)
J.S. Bach; Handel; F. Couperin; Rameau; Beethoven (Wilhelm Kempff: Complete Decca Recordings, Vol. 1)
Harpsichord Suite No. 1 in B-Flat Major (Set II), HWV 434: Minuet (Arr. Kempff for Piano)
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Chopin: Piano Sonata No. 3; Ballade No. 3; Andante spianato et Grande polonaise brillante; Fantaisie; Polonaise-fantaisie (Wilhelm Kempff: Complete Decca Recordings, Vol. 7)
Chopin: Piano Sonata No. 2; Impromptus; Berceuse; Barcarolle (Wilhelm Kempff: Complete Decca Recordings, Vol. 6)
Brahms: Rhapsodies, Op. 79; Intermezzi, Op. 117; Six Piano Pieces, Op. 118 (Wilhelm Kempff: Complete Decca Recordings, Vol. 10)
Brahms: Four Ballades, Op. 10; Eight Piano Pieces, Op. 76; Rhapsodies, Op. 79; Intermezzi, Op. 117 (Wilhelm Kempff: Complete Decca Recordings, Vol. 11)
Brahms: Fantasias (Seven Piano Pieces), Op. 116; Four Piano Pieces, Op. 119 [Wilhelm Kempff: Complete Decca Recordings, Vol. 12]
Beethoven: Sonata for Cello and Piano No. 1; Sonata for Cello and Piano No. 3; Violin Sonata No. 9 'Kreutzer' (Wilhelm Kempff: Complete Decca Recordings, Vol. 13)
Cello Sonata No. 1 in F Major, Op. 5 No. 1: I. Adagio sostenuto - Allegro - Adagio - Presto - Live
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Cello Sonata No. 3 in A Major, Op. 69: III. Adagio cantabile - Allegro vivace
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Cello Sonata No. 3 in A Major, Op. 69: IV. Allegro vivace
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Violin Sonata No. 9 in A Major, Op. 47 "Kreutzer": II. Andante con variazioni
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A Bach Recital (Wilhelm Kempff: Complete Decca Recordings, Vol. 2)
Nun komm, der Heiden Heiland, BWV 659 (Arr. Kempff for Piano)
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In dulci jubilo, BWV 729 (Arr. Kempff for Piano)
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Bach, Mozart, Schubert & Schumann: Works for Piano
Beethoven: Op.27 & Op.109 - Chopin: Nocturne Op.9 No.3 - Schubert: Impromptu Op.90 No.4 - Schumann: Kreisleriana, Op.16 (Previously Unreleased Piano Recordings)
Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": III. Rondo (Allegro)
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": II. Allegretto
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Piano Sonata No. 15 in D Major, Op. 28 -"Pastorale": II. Andante
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Piano Sonata No. 17 in D Minor, Op. 31 No. 2 "The Tempest": I. Largo - Allegro
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Piano Sonata No. 3 in C Major, Op. 2 No. 3: III. Scherzo. Allegro
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Schumann, Beethoven & Brahms: Works for Solo Piano (Live)
Wilhelm Kempff: Piano Recital 1962 (Live)
Herzlich tut mich verlangen, BWV 727 (Arr. Kempff for Piano)
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Harpsichord Suite No. 5 in E Major, HWV 430 "The Harmonious Blacksmith": IV. Air con variazioni
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Troisième livre de pièces de clavecin / Ordre XIV in D Major: 7. Le carillon de Cithére
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Suite in E Minor, RCT 2: 5. Le rappel des oiseaux (Arr. Kempff for Piano)
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Beethoven Piano Sonatas: The Complete Wartime 78-rpm Recordings
Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": I. Grave - Allegro di molto e con brio
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Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": I. Allegro con brio
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Mozart Piano Concertos 23, 24, & No.8 'Lützow'
Beethoven, Brahms, Chopin, Schumann & Schubert: Piano Works
Brahms: Piano Concerto No. 1 in D Minor, Op. 15 (Live)
Sonata No. 1 in F Minor, Op. 2 No. 1: I. Allegro
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Sonata No. 5 in C Minor, Op. 10 No. 1: II. Adagio molto
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Rondo a capriccio in G Major, Op. 129 "Die Wut über den verlornen Groschen" for Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe2bce1bb601db129914b854af2a98e4edab3ca8fe06f6c2fce82972adaf829. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF056400380.