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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08211d1d6647cc83735ad0ec21c0ce03b0de91af79e2e8116303e2061e3e8c0b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54a85144-5dcd-48e9-abb8-e3b05779e21b.json and https://artists.proofprofile.net/proofs/artist/54a85144-5dcd-48e9-abb8-e3b05779e21b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonate Op. 46 No. 2: II. Allegro Agitato
Humoreske Bagateller Op. 11: I. Goddag! Goddag!
Humoreske Bagateller Op. 11: II. Snurretoppen
Humoreske Bagateller Op. 11: III. En Lille Langsom Vals
Humoreske Bagateller Op. 11: IV. Sprællemanden
Humoreske Bagateller Op. 11: V. Dukkemarch
Humoreske Bagateller Op. 11: VI. Spilleværket
Trio for Piano, Violin and Violoncello No. 1 in B Major, Op. 8: I. Allegro con brio
Trio for Piano, Violin and Violoncello No. 1 in B Major, Op. 8: II. Scherzo. Allegro molto
Trio for Piano, Violin and Violoncello No. 1 in B Major, Op. 8: III. Adagio
Trio for Piano, Violin and Violoncello No. 1 in B Major, Op. 8: IV. Finale
Trio for Piano, Violin and Violoncello in F Minor, Op. 65: I. Allegro ma non troppo. Poco piu mosso, quaso vivace
Trio for Piano, Violin and Violoncello in F Minor, Op. 65: II. Allegro grazioso. Meno mosso
Trio for Piano, Violin and Violoncello in F Minor, Op. 65: III. Poco adagio
Trio for Piano, Violin and Violoncello in F Minor, Op. 65: IV. Finale: Allegro con brio. Meno mosso. Vivace
Befiehl du deine Wege, BWV 272: I. Orgelkoral - Arr. Wilhelm Kempff for piano
Flute Sonate Es-Dur BWV 1031: I. Siciliano - Arr. Wilhelm Kempff for piano
Nun freut euch, lieben Christen gmein, BWV 734: I. Orgelkoral - Arr. Ferrucio Ferruccio Busoni for piano
Prelude and Fugue No.10 in E minor, BWV 855: I. Præludium - Arr. Alexander Siloti for piano
Lieder ohne Worte, Op.67 No.4: Spinnerlied
Waldszenen, Op.82: VII. Vogel als Prophet
Le carnaval des animaux, R.125 : 13. Le cygne - Arr. Leopold Godowsky
Ungarsk Rhapsody in Cis-Moll, No. 12, S.244/12
Herzlich tut mich verlagen, BWV 727 (arr. W. Kempff)
Flute Sonata in E-Flat Major, BWV 1031: II. Siciliano (arr. W. Kempff)
Nun freut euch, liebe Christen gmein, BWV 734 (arr. Busoni for piano)
Prelude in E Minor, BWV 855a (arr. A. Siloti)
Premier livre de pieces de clavecin, Suite No. 3: No. 15. Le Coucou
38 Walzer, Landler und Ecossaisen (38 Waltzes, Landler and Ecossaises), Op. 18, D. 145: Landler Nos. 1-17
Lieder ohne Worte (Songs without Words), Book 5, Op. 62: No. 30 in A Major, Op. 62, No. 6, "Fruhlingslied" - Book 6, No. 34 in C Major, Op. 67, No. 4, "Spinnerlied"
Waldscenen, Op. 82: No. 7. Vogel als Prophet (Bird as Prophet)
Saint-Saens - Carnival of the Animals: XIII. Le Cygne (The Swan)
Schumann - Liebeslied, "Widmung", S566/R253
19 Hungarian Rhapsodie: No. 12 in C-Sharp Minor, S244/R106
Theme and Variations in C-Sharp Minor, Op. 73
Sonate I C-Dur Hob. XVIi 21 - I. Allegro
Sonate I C-Dur Hob. XVIi 21 - II. Adagio
Sonate I C-Dur Hob. XVIi 21 - III. Finale: Presto
Sonate I D-Dur Hob. XVIi 37 - I. Allegro Con Brio
Sonate I D-Dur Hob. XVIi 37 - II. Largo Sostenuto
Sonate I D-Dur Hob. XVIi 37 - III. Presto, Ma Non Troppo
Sonate I G-Dur Hob. XVI 40 - I. Allegretto E Innocente
Sonate I G-Dur Hob. XVIi 40 - II. Presto
Klaverkoncert I D-Dur - I. Vivace (Candence J. Haydn)
Klaverkoncert I D-Dur - III. Rondo all'Ongharese
John Damgaard - Beethoven's Last Piano Sonatas Op. 109 / 110 / 111
Sonata In E Major Opus 109 - 1. Vivace, Ma Non Troppe
Sonata In E Major Opus 109 - 2. Prestissimo
Sonata In E Major Opus 109 - 3. Andante Molto Cantabile Ed Espressivo
Sonata In A-Flat Major Opus 110 - 1. Moderato Cantabile Molto Espressivo
Sonata In A-Flat Major Opus 110 - 2. Allegro Molto
Sonata In A-Flat Major Opus 110 - 3. Recitativo - Arioso Dolente - Fuga - Arioso - Fuga
Sonata In C Mino Opus 111 - 1. Maestoso - Allegro Con Brio Ed Appassionato
Sonata In C Mino Opus 111 - 2. Arietta. Adagio Molto Semplice E Cantabile
John Damgaard Plays Beethoven, Chopin and Brahms
Piano Sonata No. 31 in A-Flat Major, Op. 110: I. Moderato, cantabile molto espressivo
Piano Sonata No. 31 in A-Flat Major, Op. 110: II. Allegro molto
Piano Sonata No. 31 in A-Flat Major, Op. 110: III. Recitativo - Arioso dolente - Fugue - Arioso - Fugue
Piano Sonata No. 3 in B Minor, Op. 58: I. Allegro maestoso
Piano Sonata No. 3 in B Minor, Op. 58: II. Scherzo - Molto vivace
Piano Sonata No. 3 in B Minor, Op. 58: III. Largo
Piano Sonata No. 3 in B Minor, Op. 58: IV. Finale - Presto, non tanto
Variations and Fugue on a Theme by Handel, Op. 24: I. Theme and Variations 1-8
Variations and Fugue on a Theme by Handel, Op. 24: II. Variation 9 and Variations 10-17
Variations and Fugue on a Theme by Handel, Op. 24: III. Variation 18 and Variations 19-25 and Fugue
Beethoven, Chopin & Brahms: Works for Piano
Piano Sonata No. 31 in A-Flat Major, Op. 110: I. Moderato cantabile molto espressivo
Piano Sonata No. 31 in A-Flat Major, Op. 110: III. Adagio ma non troppo
Piano Sonata No. 3 in B Minor, Op. 58, B. 155: I. Allegro maestoso
Piano Sonata No. 3 in B Minor, Op. 58, B. 155: II. Scherzo. Molto vivace
Piano Sonata No. 3 in B Minor, Op. 58, B. 155: III. Largo
Piano Sonata No. 3 in B Minor, Op. 58, B. 155: IV. Finale. Presto non tanto
Variations and Fugue on a Theme by Handel, Op. 24: Theme - Vars. 1-8
Variations and Fugue on a Theme by Handel, Op. 24: Vars. 9-17
Variations and Fugue on a Theme by Handel, Op. 24: Vars. 18-25 - Fugue
Piano Concerto in D Major, Hob XVIII: I. Vivace
Piano Concerto in D Major, Hob XVIII: II. Un poco adagio
Piano Concerto in D Major, Hob XVIII: III. Rondo all 'Ungherese
Piano Sonata No. 6 in A Minor, Op. 164, D. 537: I. Allegro ma non troppo
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 → block OTSBitcoinBlock must exist at that height 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 0xaf7dca72305a8da220d75d130548a9966264cf96d14c310d6d5a82930ee8ebfe. 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/DKECA2557501.
Piano Sonata No. 6 in A Minor, Op. 164, D. 537: II. Allegretto quasi andantino
Piano Sonata No. 6 in A Minor, Op. 164, D. 537: III. Allegro vivace
Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0456ed9726c1475bfdea42f13a36dd3a70a0bdf649ac0da11828b7efd9b604b1. 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/DKECA2557504.
Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: II. Andante molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d9f5b892524c5a5a7e1913be1be1b4653d6f77e7dd6566b981f472b7e2d3eb. 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/DKECA2557505.
Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: III. Menuetto. Allegretto - Trio
Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: IV. Allegro moderato
Piano Sonata No. 9 in A Minor, Op. 42, D. 845: I. Moderato
Piano Sonata No. 9 in A Minor, Op. 42, D. 845: II. Andante poco mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3afa539a13224845ef18d636f9727c35a5d5ba24baf9a6f166f543855af389. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKECA2557509.
Piano Sonata No. 9 in A Minor, Op. 42, D. 845: III. Scherzo. Allegro vivace - Trio. Un poco più lento
Piano Sonata No. 9 in A Minor, Op. 42, D. 845: IV. Rondo. Allegro vivace
Piano Sonata No. 5 in B Major, Op. 147, D. 575: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877cc51eb0eae20a6eb3c9773cab52a5475678120e47feffe31802d760fb0e62. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DKECA2557601.
Piano Sonata No. 5 in B Major, Op. 147, D. 575: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63fb447ec9fd92728a737377dae0fa50015a18e0c2ee679166a855391be4d8b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKECA2557602.
Piano Sonata No. 5 in B Major, Op. 147, D. 575: III. Scherzo. Allegretto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62417f4357ae48db59cdc4fa97b1f5b5b3c3b012e3f77e517b7308f0aad95975. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DKECA2557603.
Piano Sonata No. 5 in B Major, Op. 147, D. 575: IV. Allegro giusto
Piano Sonata No. 11 in D Major, Op. 53, D. 850 "Gasteiner": I. Allegro vivace
Piano Sonata No. 11 in D Major, Op. 53, D. 850 "Gasteiner": II. Con moto