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 0x5e7dfad52d8626441f7f74f64d5a840bcfdfb6edaf1551beda750b48a65f523c. 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/67542ef6-0a1f-441b-9ba0-44780a92e1fd.json and https://artists.proofprofile.net/proofs/artist/67542ef6-0a1f-441b-9ba0-44780a92e1fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Denisov: Ode - Clarinet Quintet - Clarinet Concerto (Digitally Remastered)
Ode (1968) for clarinet, piano and percussion
Clarinet Quintet (1987) for clarinet and string quartet: I. Agitato
Clarinet Quintet (1987) for clarinet and string quartet: II. Molto tranquillo
Clarinet Quintet (1987) for clarinet and string quartet: III. Agitato
Concerto For clarinet And orchestra (1989): I. Agitato
Concerto For clarinet And orchestra (1989): II. Lento
Nine Pieces For Solo Viola: Szorongós és vigasztalós H.J.-nek (Molto sostenuto)
Nine Pieces For Solo Viola: Kromatikus feleselós (Agitato)
Nine Pieces For Solo Viola: In memoriam Aczél György (Largo desolato)
Nine Pieces For Solo Viola: Elakadó szavak (Hommage à John Cage)
Nine Pieces For Solo Viola: Doloroso (Lento, parlando)
Nine Pieces For Solo Viola: H.J.-Nóta (Largamente)
Nine Pieces For Solo Viola: Levél Verának (Szeliden, csendesen)
Nine Pieces For Solo Viola: Vagdalkozós (Vivo, feroce)
Nine Pieces For Solo Viola: In memoriam Tamás Blum (Calmo, sereno)
Hommage à R.Sch., Op. 15d: (merkwürdige Pirouetten des Kapellmeisters Johannes Kreisler) (Vivo)
Hommage à R.Sch., Op. 15d: [E.: der begrenzte Kreis...] (Molto semplice, piano e legato)
Hommage à R.Sch., Op. 15d: [...und wieder zuckt es schmerzlich F. um die Lippen...] (Feroce, agitato)
Hommage à R.Sch., Op. 15d: [Felhó valék, már süt a nap..] [töredék-töredék] (Calmo, scorrevole)
Hommage à R.Sch., Op. 15d: In der Nacht (Presto)
Hommage à R.Sch., Op. 15d: Abschied [Meister Raro entdeckt Guillaume de Machaut] (Adagio, poco andante)
Märchenbilder, Op. 113: 1. Nicht schnell
Märchenbilder, Op. 113: 4. Langsam, mit melancholischem Ausdruck
Fantasiestücke, Op. 73: 1. Zart und mit Ausdruck
Fantasiestücke, Op. 73: 2. Lebhaft, leicht
Fantasiestücke, Op. 73: 3. Rasch und mit Feuer
Märchenerzählungen, Op. 132: 1. Lebhaft, nicht zu schnell
Märchenerzählungen, Op. 132: 2. Lebhaft und sehr markiert - 3. Ruhiges Tempo, mit zartem Ausdruck
Märchenerzählungen, Op. 132: 4. Lebhaft, sehr markiert
Beethoven: Piano Concertos Nos.1-5; Symphony No. 2, Op. 36; Fantasy For Piano, Chorus And Orchestra, Op. 80; Choral Fantasy (two altern. improv. piano introd.); Rondo For Piano And Orchestra
Piano Concerto No. 2 in B-Flat Major, Op. 19: I. Allegro con brio (Cadenza: Levin)
Piano Concerto No. 3 in C Minor, Op. 37: I. Allegro con brio (Cadenza: Levin)
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro
Piano Concerto No. 4 in G Major, Op. 58: I. Allegro moderato (Cadenza: Levin)
Piano Concerto No. 2 in B-Flat Major, Op. 19: II. Adagio
Piano Concerto No. 3 in C Minor, Op. 37: II. Largo
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": II. Adagio un poco moto –
Piano Concerto No. 4 in G Major, Op. 58: II. Andante con moto (Cadenza: Levin)
Piano Concerto No. 2 in B-Flat Major, Op. 19: III. Rondo. Molto allegro
Piano Concerto No. 3 in C Minor, Op. 37: III. Rondo. Allegro (Cadenza: Levin)
Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": III. Rondo. Allegro ma non troppo
Piano Concerto No. 4 in G Major, Op. 58: III. Rondo. Vivace (Cadenza: Levin)
Rondo in B-Flat Major for Piano and Orchestra, WoO6
Piano Concerto No. 4 in G Major, Op. 58: I. Allegro moderato
Fantasia in C Minor, Op. 80 "Choral Fantasy": I. Adagio
Symphony No. 2 in D Major, Op. 36: I. Adagio molto – Allegro con brio
Piano Concerto No. 1 in C Major, Op. 15: I. Allegro con brio (Cadenza: Levin)
Piano Concerto No. 4 in G Major, Op. 58: II. Andante con moto
Fantasia in C Minor, Op. 80 "Choral Fantasy": II. Finale. Allegro – Allegretto, ma non troppo (quasi Andante con moto)
Symphony No. 2 in D Major, Op. 36: II. Larghetto
Piano Concerto No. 1 in C Major, Op. 15: II. Largo
Piano Concerto No. 4 in G Major, Op. 58: III. Rondo. Vivace
Fantasia in C Minor, Op. 80 "Choral Fantasy": I. Adagio. Alternative Improvised Introduction 1 (Comp. Levin)
Symphony No. 2 in D Major, Op. 36: III. Scherzo. Allegro
Piano Concerto No. 1 in C Major, Op. 15: III. Rondo. Allegro scherzando
Fantasia in C Minor, Op. 80 "Choral Fantasy": I. Adagio. Alternative Improvised Introduction 2 (Comp. Levin)
Symphony No. 2 in D Major, Op. 36: IV. Allegro molto
Piano Concerto No. 7 in F Major, K. 242: I. Allegro
Piano Concerto No. 7 in F Major, K. 242: II. Adagio
Piano Concerto No. 7 in F Major, K. 242: III. Rondo. Tempo di minuetto
Concerto for Violin, Piano and Orchestra in D Major, K. Anh. 56/315f
Piano Concerto No. 10 in E-Flat Major, K. 365/316a: I. Allegro
Piano Concerto No. 10 in E-Flat Major, K. 365/316a: II. Andante
Piano Concerto No. 10 in E-Flat Major, K. 365/316a: III. Rondo. Allegro
Sibelius, Grieg & Scriabine: Edition Klavier-Festival Ruhr, Vol. 34
4 Norwegian Dances, Op. 35: No. 1, Allegro marcato
6 Impromptus, Op. 5: No. 2, Lento. Vivace
4 Norwegian Dances, Op. 35: No. 2, Allegretto tranquillo e grazioso
6 Impromptus, Op. 5: No. 3, Moderato (alla marcia)
4 Norwegian Dances, Op. 35: No. 3, Allegro moderato alla marcia
4 Norwegian Dances, Op. 35: No. 4, Allegro molto
Scenes of Country Life, Op. 19: No. 1, On the Mountains
Scenes of Country Life, Op. 19: No. 2, Norwegian Bridal Procession
5 Pieces for Piano, Op. 75: No. 1, När rönnen blommar
Scenes of Country Life, Op. 19: No. 3, From Carneval
5 Pieces for Piano, Op. 75: No. 2, Den ensamma furan
Piano Sonata in E Minor, Op. 7: I. Allegro moderato
5 Pieces for Piano, Op. 75: No. 3, Aspen
Piano Sonata in E Minor, Op. 7: II. Andante molto
5 Pieces for Piano, Op. 75: No. 4, Björken
Piano Sonata in E Minor, Op. 7: III. Alla Menuetto, ma poco più lento
5 Pieces for Piano, Op. 75: No. 5, Granen
Piano Sonata in E Minor, Op. 7: IV. Finale: Molto allegro
5 Pieces for Piano, Op. 85: No. 1, Bellis
Lyric Pieces, Book II, Op. 38: No. 7, Waltz
5 Pieces for Piano, Op. 85: No. 2, Oeillet - Nejikan
Lyric Pieces, Book V, Op. 54: No. 4, Notturno
Lyric Pieces, Book V, Op. 54: No. 5, Scherzo
5 Pieces for Piano, Op. 85: No. 4, Aquileja
Lyric Pieces, Book VII, Op. 62: No. 6, Homeward
5 Pieces for Piano, Op. 85: No. 5, Campanula
Lyric Pieces, Book III, Op. 43: No. 3, Path of the Dwarfs
2 Rondinos, Op. 68: No. 1 in G-Sharp Minor
2 Rondinos, Op. 68: No. 2 in C-Sharp Minor
Sonatina No. 1 in F-Sharp Minor, Op. 67: I. Allegro
Sonatina No. 1 in F-Sharp Minor, Op. 67: II. Largo
Sonatina No. 1 in F-Sharp Minor, Op. 67: III. Allegro moderato
10 Pensées Lyriques, Op. 40: No. 1, Valsette
6 Bagatelles for Piano, Op. 97: No. 1, Humoreske I
13 Pieces for Piano, Op. 76: No. 11, Linnaea
10 Pensées Lyriques, Op. 40: No. 6, Pensée mélodique
13 Pieces for Piano, Op. 76: No. 13, Harlequinade
6 Bagatelles for Piano, Op. 97: No. 11, Humoreske II
5 characteristic Impressions Op. 103: No. 1, The Village Church
2 Pieces for Organ, Op. 111: No. 2, Surusoitto
5 Sketches, Op. 114: No. 2, Winter Picture
5 Sketches, Op. 114: No. 4, The Song in the Woods
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1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddb25445f328285dbb8ad783be94fc6cced54c59c9c6b8001c2ba4a262451d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6xJWYV22ezH4dnYdeE5Xgt.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6xJWYV22ezH4dnYdeE5Xgt.
{"copyright_id":"0xa05de840737aab77b5dbbdd7329e01308912fcefc68dd07732f2dd38044c049c","isrc":"GBMY51300219","name":"Requiem, K. 626: Cum sanctis tuis","registered_at":"2026-06-18T17:21:33Z","spotify_id":"3cxkbiON4lbGycV5J53G4W","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05de840737aab77b5dbbdd7329e01308912fcefc68dd07732f2dd38044c049c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3cxkbiON4lbGycV5J53G4W.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3cxkbiON4lbGycV5J53G4W.
Violin Concerto No. 3 in G Major, K. 216: II. Adagio (Cadenza: Levin)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9490026f7e047658deb71feb21c7f626f5b44111ea2030f37c99bf4bccb4596b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6LGSlEJsNbeeIzk5E7liZx.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6LGSlEJsNbeeIzk5E7liZx.
Wolfgang Amadeus Mozart: Schatten ung licht: Chapter 5: Fort mir dir nach Paris! (1777-1779)
Camerata Academica des Mozarteum Salzburg