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 0x1b7a1670f8525703d6e300a0153c01444d7ffac9f28abaa0451905c7f2ad2886. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1358d22d-3a1b-4405-91b1-b6ef0e118f82.json and https://artists.proofprofile.net/proofs/artist/1358d22d-3a1b-4405-91b1-b6ef0e118f82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach Violin Sonata BWV 1021 & BWV 1023 - Bonporti: Invention in G Minor, Op. 10, No. 4 & Invention in E Minor, Op. 10, No. 8
Violin Sonata in G Major, BWV 1021: I. Adagio
Violin Sonata in G Major, BWV 1021: II. Vivace
Violin Sonata in G Major, BWV 1021: III. Largo
Violin Sonata in G Major, BWV 1021: IV. Presto
Violin Sonata in E Minor, BWV 1023: I. Prelude
Violin Sonata in E Minor, BWV 1023: II. Adagio ma non tanto
Violin Sonata in E Minor, BWV 1023: III. Allemanda
Violin Sonata in E Minor, BWV 1023: IV. Gigue
Invention in G Minor, Op. 10, No. 4: I. Largo
Invention in G Minor, Op. 10, No. 4: II. Balletto. Allegro
Invention in G Minor, Op. 10, No. 4: III. Aria. Adagio
Invention in G Minor, Op. 10, No. 4: IV. Corrente. Presto
Invention in E Minor, Op. 10, No. 8: I. Preludio
Invention in E Minor, Op. 10, No. 8: II. Balletto
Invention in E Minor, Op. 10, No. 8: III. Adagio
Invention in E Minor, Op. 10, No. 8: IV. Giga
Recital of Swiss Composers for Violin & Harpsichord
Sonata No. 4 in E Minor for Violin & Harpsichord, Op. 2: I. Andante
Sonata No. 4 in E Minor for Violin & Harpsichord, Op. 2: II. Allegro
Sonata No. 4 in E Minor for Violin & Harpsichord, Op. 2: III. Gratioso
Sonatine for Violin & Piano (Harpsichord), Op. 45: I. Allegro moderato
Sonatine for Violin & Piano (Harpsichord), Op. 45: II. Poco adagio
Sonatine for Violin & Piano (Harpsichord), Op. 45: III. Rondo, Allegretto
Sonata for Solo Violin in D Minor, H 143: I. Allegro
Sonata for Solo Violin in D Minor, H 143: II. Largo
Sonata for Solo Violin in D Minor, H 143: III. Allegretto grazioso
Sonata for Solo Violin in D Minor, H 143: IV. Presto
Suite en miniature No. 2 for Violin & Piano (Harpsichord), Op. 71: I. Modetato
Suite en miniature No. 2 for Violin & Piano (Harpsichord), Op. 71: II. Allegretto non troppo
Suite en miniature No. 2 for Violin & Piano (Harpsichord), Op. 71: III. Presto - Lento
Suite en miniature No. 2 for Violin & Piano (Harpsichord), Op. 71: IV. Adagio
Suite en miniature No. 2 for Violin & Piano (Harpsichord), Op. 71: V. Allegro
Suite en miniature No. 2 for Violin & Piano (Harpsichord), Op. 71: VI. Walzer
Suite en miniature No. 2 for Violin & Piano (Harpsichord), Op. 71: VII. Tranquillo
Sonata No. 3 in E Minor for Violin & Piano (Harpsichord), Op. 5: I. Affectuoso
Sonata No. 3 in E Minor for Violin & Piano (Harpsichord), Op. 5: II. Vivace
Sonata No. 3 in E Minor for Violin & Piano (Harpsichord), Op. 5: III. Affectuoso
Sonata No. 3 in E Minor for Violin & Piano (Harpsichord), Op. 5: IV. Allegro
Sonata No. 3 in E Minor for Violin & Piano (Harpsichord), Op. 5: V. Grave
Sonata No. 3 in E Minor for Violin & Piano (Harpsichord), Op. 5: VI. Vivace
Petite Serenade for Violin & Piano (Harpsichord)
Bach: Sonatas BWV 1021, 1023, 1024 - Bonporti: Invenzioni, Op. 10, Vol. 2
Invention in B Minor, Op. 10, No. 2: I. Largo
Invention in B Minor, Op. 10, No. 2: II. Balletto: Allegro
Invention in B Minor, Op. 10, No. 2: III. Scherzo: Andante
Invention in B Minor, Op. 10, No. 2: IV. Capriccio: Allegro
Invention in B-Flat Major, Op. 10, No. 5: I. Andante
Invention in B-Flat Major, Op. 10, No. 5: II. Aria: Largo
Invention in B-Flat Major, Op. 10, No. 5: III. Giga: Presto
Invention in B-Flat Major, Op. 10, No. 5: IV. Fantasia: Amabile
Invention in C Minor, Op. 10, No. 6: I. Lamentevole
Invention in C Minor, Op. 10, No. 6: II. Balletto: Allegro
Invention in C Minor, Op. 10, No. 6: III. Aria: Comodo assai
Invention in C Minor, Op. 10, No. 6: IV. Fantasia: Allegro non presto
Invention in D Major, Op. 10, No. 7: I. Adagio
Invention in D Major, Op. 10, No. 7: II. Bizaria: Presto
Invention in D Major, Op. 10, No. 7: III. Andamento: Largo
Invention in D Major, Op. 10, No. 7: IV. Scherzo: Presto
Sonata in G Major for Violin and Continuo, BWV 1021: I. Adagio
Sonata in G Major for Violin and Continuo, BWV 1021: II. Vivace
Sonata in G Major for Violin and Continuo, BWV 1021: III. Largo
Sonata in G Major for Violin and Continuo, BWV 1021: IV. Presto
Sonata in E Minor for Violin and Continuo, BWV 1023: I. Prelude
Sonata in E Minor for Violin and Continuo, BWV 1023: II. Adagio ma non tanto
Sonata in E Minor for Violin and Continuo, BWV 1023: III. Allemanda
Sonata in E Minor for Violin and Continuo, BWV 1023: IV. Gigue
Sonata in C Minor for Violin and Continuo, BWV 1024: I. Adagio
Sonata in C Minor for Violin and Continuo, BWV 1024: II. Presto
Sonata in C Minor for Violin and Continuo, BWV 1024: III. Affetuoso
Sonata in C Minor for Violin and Continuo, BWV 1024: IV. Vivace
Tomaso Albinoni & Antonio Vivaldi: Violin Sonatas
Sonata in G Minor for Violin & Harpsichord, Op. 6 No. 2: I. Grave Adagio
Sonata in G Minor for Violin & Harpsichord, Op. 6 No. 2: II. Larghetto
Sonata in G Minor for Violin & Harpsichord, Op. 6 No. 2: III. Largo
Sonata in G Minor for Violin & Harpsichord, Op. 6 No. 2: IV. Allegro
Sonata in D Minor for Violin & Harpsichord, Op. 6 No. 4: I. Grave Adagio
Sonata in D Minor for Violin & Harpsichord, Op. 6 No. 4: II. Larghetto
Sonata in D Minor for Violin & Harpsichord, Op. 6 No. 4: III. Adagio
Sonata in D Minor for Violin & Harpsichord, Op. 6 No. 4: IV. Allegro
Sonata in D Major for Violin & Harpsichord, Op. 6 No. 7: I. Grave Adagio
Sonata in D Major for Violin & Harpsichord, Op. 6 No. 7: II. Larghetto
Sonata in D Major for Violin & Harpsichord, Op. 6 No. 7: III. Largo
Sonata in D Major for Violin & Harpsichord, Op. 6 No. 7: IV. Allegro
Sonata in C Minor for Violin & Harpsichord, RV 7a: I. Preludio Largo
Sonata in C Minor for Violin & Harpsichord, RV 7a: II. Allemanda Allegro
Sonata in C Minor for Violin & Harpsichord, RV 7a: III. Grave
Sonata in C Minor for Violin & Harpsichord, RV 7a: IV. Vivace
Sonata No. 8 in G Major for Violin & Harpsichord, RV 22: I. Largo
Sonata No. 8 in G Major for Violin & Harpsichord, RV 22: II. Allegro
Sonata No. 8 in G Major for Violin & Harpsichord, RV 22: III. Largo
Sonata No. 8 in G Major for Violin & Harpsichord, RV 22: IV. Allegro
Sonata No. 3 in G Minor for Violin & Harpsichord, RV 757: I. Adagio
Sonata No. 3 in G Minor for Violin & Harpsichord, RV 757: II. Allegro
Sonata No. 3 in G Minor for Violin & Harpsichord, RV 757: III. Adagio
Sonata No. 3 in G Minor for Violin & Harpsichord, RV 757: IV. Allegro
Sonata in C Minor for Violin & Harpsichord, RV 6: I. Preludio Andante
Sonata in C Minor for Violin & Harpsichord, RV 6: II. Corrente Allegro
Sonata in C Minor for Violin & Harpsichord, RV 6: III. Grave
Sonata in C Minor for Violin & Harpsichord, RV 6: IV. Allemanda Allegro
Sonata No. 12 in C Major, RV 754: I. Preludio Largo
Sonata No. 12 in C Major, RV 754: II. Allemanda Allegro
Sonata No. 12 in C Major, RV 754: III. Sarabanda Largo
Sonata No. 12 in C Major, RV 754: IV. Corrente Allegro
Violin Sonata in A Minor, Op. 1, No. 2: I. Preludio Adagio
Violin Sonata in A Minor, Op. 1, No. 2: II. Allemanda Larghetto
Violin Sonata in A Minor, Op. 1, No. 2: III. Siciliana Cantabile
Violin Sonata in A Minor, Op. 1, No. 2: IV. Grave
Violin Sonata in A Minor, Op. 1, No. 2: V. Aria Allegro
Sonata in D Minor, Op. 6, No. 12: I. Adagio
Sonata in D Minor, Op. 6, No. 12: II. Allegro
Sonata in D Minor, Op. 6, No. 12: III. Andante
Sonata in D Minor, Op. 6, No. 12: IV. Allegro
Violin Sonata in A Major, Op. 1, No. 3, HWV 361: I. Andante
Violin Sonata in A Major, Op. 1, No. 3, HWV 361: II. Allegro
Violin Sonata in A Major, Op. 1, No. 3, HWV 361: III. Adagio
Violin Sonata in A Major, Op. 1, No. 3, HWV 361: IV. Allegro
Violin Sonata in G Minor, HWV 364b: I. Larghetto
Violin Sonata in G Minor, HWV 364b: II. Allegro
Violin Sonata in G Minor, HWV 364b: III. Adagio
Violin Sonata in G Minor, HWV 364b: IV. Allegro
Violin Sonata in D Minor, Op. 1, No. 1, HWV 359a: I. Grave
Violin Sonata in D Minor, Op. 1, No. 1, HWV 359a: II. Allegro
Violin Sonata in D Minor, Op. 1, No. 1, HWV 359a: III. Adagio
Violin Sonata in D Minor, Op. 1, No. 1, HWV 359a: IV. Allegro
Violin Sonata No. 7 in D Major, Op. 1, No. 13, HWV 371: I. Affettuoso
Violin Sonata No. 7 in D Major, Op. 1, No. 13, HWV 371: II. Allegro
Violin Sonata No. 7 in D Major, Op. 1, No. 13, HWV 371: III. Larghetto
Violin Sonata No. 7 in D Major, Op. 1, No. 13, HWV 371: IV. Allegro