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 0x2dbbc58cfd1e61184260a100f46ddac9f36103396505401a764ae7c0b3c93031. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd6907fe-d9d3-4dc9-b051-70dde0850201.json and https://artists.proofprofile.net/proofs/artist/dd6907fe-d9d3-4dc9-b051-70dde0850201.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
24 Duos, Vol. 1: No. 2, Alla breve, ma pesante
24 Duos, Vol. 1: No. 3, Lento un poco andante
24 Duos, Vol. 1: No. 7, Andante cantabile
24 Duos, Vol. 1: No. 13, Vier Strophen vom Heimweh
24 Duos, Vol. 2: No. 16, Petit ballet mecanique
24 Duos, Vol. 2: No. 18, Moderato un poco allegretto
24 Duos, Vol. 2: No. 20, Ängstlich, zögernd
24 Duos, Vol. 2: No. 21, Valse bavaroise
24 Duos, Vol. 2: No. 23, Deciso, con brio
24 Duos, Vol. 2: No. 24, Toccatina all'inglese
Duo Sonata in A Minor, M. 73: I. Allegro
Duo Sonata in A Minor, M. 73: II. Très vif
Duo Sonata in A Minor, M. 73: III. Lento un poco andante
Duo Sonata in A Minor, M. 73: IV. Vif, avec entrain
Roussel: Violin Sonatas Nos. 1-2 & String Trio
Violin Sonata No. 1 in D Minor, Op. 11, L. 12: I. Lent - Très animé
Violin Sonata No. 1 in D Minor, Op. 11, L. 12: II. Assez animé
Violin Sonata No. 1 in D Minor, Op. 11, L. 12: III. Très animé
Violin Sonata No. 2 in A Major, Op. 28, L. 33: I. Allegro con moto
Violin Sonata No. 2 in A Major, Op. 28, L. 33: II. Andante
Violin Sonata No. 2 in A Major, Op. 28, L. 33: III. Presto
String Trio in A Minor, Op. 58, L. 73: I. Allegro moderato
String Trio in A Minor, Op. 58, L. 73: II. Adagio
String Trio in A Minor, Op. 58, L. 73: III. Allegro con spirito
French Favorites: Debussy, Franck, Ravel & Chopin
Sonata for Cello & Piano in D Minor, L. 135: I. Prologue
Sonata for Cello & Piano in D Minor, L. 135: II. Serenade
Sonata for Cello & Piano in D Minor, L. 135: III. Finale
Sonata for Violin & Piano in A Major, FWV 8 (Arr. J. Delsart for Cello & Piano): I. Allegretto ben moderato
Sonata for Violin & Piano in A Major, FWV 8 (Arr. J. Delsart for Cello & Piano): II. Allegro
Sonata for Violin & Piano in A Major, FWV 8 (Arr. J. Delsart for Cello & Piano): III. Recitativo - Fantasia. Ben moderato - Molto lento
Sonata for Violin & Piano in A Major, FWV 8 (Arr. J. Delsart for Cello & Piano): IV. Allegretto poco mosso
Pièce en forme de habanera, M. 51 (Arr. for Cello & Piano)
Sonata for Cello & Piano in G Minor, Op. 65: I. Allegro moderato
Sonata for Cello & Piano in G Minor, Op. 65: II. Scherzo. Allegro con brio
Sonata for Cello & Piano in G Minor, Op. 65: III. Largo
Sonata for Cello & Piano in G Minor, Op. 65: IV. Finale. Allegro
Cello Concerto No. 1 in E-Flat Major, Op. 107: I. Allegretto
Cello Concerto No. 1 in E-Flat Major, Op. 107: II. Moderato
Cello Concerto No. 1 in E-Flat Major, Op. 107: III. Cadenza
Cello Concerto No. 1 in E-Flat Major, Op. 107: IV. Allegro con moto
Cello Concerto No. 2 in G Major, Op. 126: I. Largo
Cello Concerto No. 2 in G Major, Op. 126: II. Allegretto
Cello Concerto No. 2 in G Major, Op. 126: III. Finale. Allegretto
St. Petersburg Academic Symphony Orchestra
Piano Trio No. 1 in D Minor, Op. 63: Mit Energie und Leidenschaft
Piano Trio No. 3 in G Minor, Op. 110: I. Bewegt, doch nicht zu rasch
Piano Trio No. 1 in D Minor, Op. 63: Lebhaft, doch nicht zu rasch
Piano Trio No. 3 in G Minor, Op. 110: II. Ziemlich langsam
Piano Trio No. 1 in D Minor, Op. 63: Langsam, mit inniger Empfindungen
Piano Trio No. 3 in G Minor, Op. 110: III. Rasch
Piano Trio No. 1 in D Minor, Op. 63: Mit Feuer
Piano Trio No. 3 in G Minor, Op. 110: IV. Kräftig, mit Humor
Piano Trio No. 2 in F, Op. 80: 1.Sehr lebhaft
Piano Trio No. 2 in F, Op. 80: 2.Mit innigem Ausdruck
Piano Trio No. 2 in F, Op. 80: 3.In mäßiger Bewegung
Piano Trio No. 2 in F, Op. 80: 4.Nicht zu rasch
The Art Of The Cello: Two Hundred Years of Cello Masterpieces
Sonata in G minor No.2, Op.5 - I - Adagio sostenuto e espressivo - Allegro molto piu toto presto
Sonata in G minor No.2, Op.5 - II - Rondo Allegro
Fantasiestuke Op.73 - I - Zart und mis Ausdruck
Fantasiestuke Op.73 - II - Lebhaft, leicht
Fantasiestuke Op.73 - III - Rasch und mit Feuer
Sonata for Cello and Piano in D minor Op.40 - I - Allegro non troppo - Largo
Sonata for Cello and Piano in D minor Op.40 - II - Allegro
Sonata for Cello and Piano in D minor Op.40 - III - Largo
Sonata for Cello and Piano in D minor Op.40 - IV - Allegro
Viola da Gamba Sonata in C Major, Wq. 136, H. 558: I. Andante
Viola da Gamba Sonata in C Major, Wq. 136, H. 558: II. Allegretto
Viola da Gamba Sonata in C Major, Wq. 136, H. 558: III. Arioso
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 0x6978b583ab3411b016fc7052369b945099a94b8ade9373aac8e3047b76c47f01. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI190761003.
Viola da Gamba Sonata in D Major, Wq. 137, H. 559: I. Adagio ma non tanto
Viola da Gamba Sonata in D Major, Wq. 137, H. 559: II. Allegro di molto
Viola da Gamba Sonata in D Major, Wq. 137, H. 559: III. Arioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864cf1f3efcc0135ca6ec57dcf4204aa2bf60e44894e9e7f351ec237eb395a76. 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/HKI190761006.
Viola da Gamba Sonata in G Minor, Wq. 88, H. 510: I. Allegro moderato
Viola da Gamba Sonata in G Minor, Wq. 88, H. 510: II. Larghetto
Viola da Gamba Sonata in G Minor, Wq. 88, H. 510: III. Allegro assai