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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffb4972909df05be99fdec9e271ed4d50f82b9b60ce439e8fd1cf21656a73f7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f949e563-404e-4be0-93bd-341fffee426b.json and https://artists.proofprofile.net/proofs/artist/f949e563-404e-4be0-93bd-341fffee426b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonata No. 5 in F-sharp minor: I. Adagio
Sonata No. 5 in F-sharp minor: II. Presto
Concerto for Harpsichord, Flute, Oboe, Clarinet, Violin and Cello: I. Allegro
Concerto for Harpsichord, Flute, Oboe, Clarinet, Violin and Cello: II. Lento
Concerto for Harpsichord, Flute, Oboe, Clarinet, Violin and Cello: III. Vivace
The Complete Fantasias of Johann Sebastian Bach
Chromatic Fantasia and Fugue in D Minor, BWV 903
"Fantasie über ein Rondo" in C Minor, BWV 918
"Fantasie duobus subiectis" in G Minor, BWV 917
3 Italian Dances [Intabolatura di varie sorte de balli, 1551]: No. 1. Le forze d'Hercole
3 Italian Dances [Intabolatura di varie sorte de balli, 1551]: No. 2. Fusi pavana piana
3 Italian Dances [Intabolatura di varie sorte de balli, 1551]: No. 3. Soltarello del re
Toccate d'intavolatura di cimbalo et organo: I. Balletto
Toccate d'intavolatura di cimbalo et organo: II. Corrente
Toccate d'intavolatura di cimbalo et organo: III. Passacagli
Tombeau fait a Paris sur la mort de Monsieur Blancheroche, FbWV 632
Suite in D Major: IV. The Prince of Denmark's March, "Trumpet Voluntary"
Pieces de clavecin, Book 2: 6th Ordre in B-Flat Major: Les baricades misterieuses (Vivement)
Pieces de clavecin, Book 2: La lyre d'orphee
Pieces de clavecin: Suite in E Minor : VIII. Tambourin
Premier livre de pieces de clavecin, Suite No. 3: Le Coucou
Keyboard Suite No. 7 (Set I) in G Minor, HWV 432: VI. Passacaille
Overture (Suite) in E-Flat Major, TWV 55:Es2: IV. Bourree I-II (arr. J.A. Bach)
Clavierbuchlein for Anna Magdalena Bach, Book 2, BWV Anh. 113-132 (by C. Petzold): Menuet in G Major, BWV Anh. 114 - Menuet in G Minor, BWV Anh. 115 (by C. Petzold)
The Well-Tempered Clavier, Book 1, BWV 846-869: Prelude No. 1 in C Major, BWV 846
The Well-Tempered Clavier, Book 1, BWV 846-869: Fugue No. 1 in C Major, BWV 846
Sonata in A Major: Harpsichord Sonata in A Major
Keyboard Sonata in D Minor, K.9/L.413/P.65
Keyboard Sonata No. 6 in A Major, “Toccata”: Harpsichord Sonata No. 6 in A Major: II. Allegro
Piano Sonata No. 11 in A Major, K. 331: III. Alla turca: Allegretto
3 Italian Dances (Intabolatura di varie sorte de balli, 1551): No. 1, Le forze d'Hercole
3 Italian Dances (Intabolatura di varie sorte de balli, 1551): No. 2, Fusi pavana piana
3 Italian Dances (Intabolatura di varie sorte de balli, 1551): No. 3, Soltarello del re
Tombeau fait à Paris sur la mort de Monsieur Blancheroche, FbWV 632: Tombeau fait a Paris sur la mort de Monsieur Blancheroche, FbWV 632
Pièces de clavecin, Book 2: 6th Ordre in B-Flat Major: Les baricades misterieuses (Vivement)
Pièces de clavecin, Book 2: La lyre d'orphee
Pièces de clavecin avec une méthode, Suite in E Minor, RCT 2: Pieces de clavecin: Suite in E Minor : VIII. Tambourin
Overture (Suite) in E-Flat Major, TWV 55:Es2: IV. Bourree I-II [arr. J.A. Bach]
Clavierbüchlein for Anna Magdalena Bach, Book 2, BWV Anh. 113-132 (by C. Petzold): Menuet in G Major, BWV Anh. 114 - Menuet in G Minor, BWV Anh. 115 [by C. Petzold]
The Well-Tempered Clavier, Book 1: Prelude No. 1 in C Major, BWV 846
The Well-Tempered Clavier, Book 1: Fugue No. 1 in C Major, BWV 846
Keyboard Sonata in D Minor, Kk. 9: Keyboard Sonata in D Minor, K.9/L.413/P.65
Keyboard Sonata No. 6 in A Major: Harpsichord Sonata No. 6 in A Major: II. Allegro
12 Violin Concertos, Op. 8 "Il cimento dell'armonia e dell'inventione" / Concerto No. 4 in F Minor for solo violin, RV297 "L'Inverno": II. Largo
12 Violin Concertos, Op. 8 "Il cimento dell'armonia e dell'inventione" / Concerto No. 1 in E Major for solo violin, RV269 "La Primavera": II. Largo
The Harmonious Blacksmith (Air and Variations in E Major from Suite No. 5, Book I)
12 Violin Concertos, Op. 8 "Il cimento dell'armonia e dell'inventione" / Concerto No. 2 in G Minor for solo violin, RV315 "L'Estate": II. Adagio - Presto
12 Violin Concertos, Op. 8 "Il cimento dell'armonia e dell'inventione" / Concerto No. 3 in F Major for solo violin, RV293 "L'Autunno": II. Adagio molto
Brandenburg Concerto No. 4 in G, BWV 1049: 1. Allegro
Sonata For Viola Da Gamba And Harpsichord No. 2 In D, BWV 1028: 1. Adagio
12 Violin Concertos, Op. 8 "Il cimento dell'armonia e dell'inventione" / Concerto No. 2 in G Minor for solo violin, RV315 "L'Estate": I. Allegro non molto
Vivaldi: The Contest Between Harmony and Invention (including The 4 Seasons)
12 Violin Concertos, Op. 8 "Il cimento dell'armonia e dell'inventione" / Concerto No. 2 in G Minor for solo violin, RV315 "L'Estate": III. Presto