1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0xf7b38460d759f16bec5fe3005ff354de0c36c13dc0fdd957c16563a9b83dc3dc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2300a668-48f9-48dd-a3b8-bcbcbba145f2.json and https://artists.proofprofile.net/proofs/artist/2300a668-48f9-48dd-a3b8-bcbcbba145f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music for Viola & Chamber Orchestra: Vaughan Williams, Martinů, Hindemith & Britten
Suite for Viola & Orchestra, Group 1: I. Prelude. Allegro moderato
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x3ac84e276b2c1b9f42cde38d920f8ca5dc7dfa1b71d122474f0305796d54a3b7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH1262000001.
Suite for Viola & Orchestra, Group 3: I. Musette. Lento
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Suite for Viola & Orchestra, Group 3: II. Polka Mélancolique. Molto moderato
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Suite for Viola & Orchestra, Group 3: III. Galop. Allegro molto
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Rhapsody-Concerto for Viola and Orchestra, H. 337: II. Molto adagio
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Trauermusik für Streichorchester mit Solobratsche: IV. Choral "Für deinen Thron tret ich hiermit“ – Sehr langsam
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Delius: Hassan - complete incidental music
Goldberg Variations, BWV 988: Var.1 (Arr. for Violin, Viola, Cello, String Orchestra & Harpsichord by Andreas N. Tarkmann)
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New Goldberg Variations on a Theme of J.S. Bach for Violin & String Orchestra: II. The Elements
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New Goldberg Variations on a Theme of J.S. Bach for Violin & String Orchestra: III. The Moocher
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Goldberg Variations, BWV 988: Var.13 (Arr. for Violin, String Orchestra & Harpsichord by Andreas N. Tarkmann)
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Sleepless after J.S. Bach for Violin & String Orchestra
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Goldberg Reflections Aria for Violin, String Orchestra & Harpsichord
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GoldBergHain (Quodlibet on "Kraut und Rüben haben mich vertrieben") for Violin & String Orchestra
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Delius: Hassan, DCW 8, Act 2: No. 2, Chorus of Women
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Goldberg's Last Summer for Violin, Piano and String Orchestra
Three Romances for Violin and Piano, Op. 22: I. Andante molto
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Shepherd's Song (After "Schafe können sicher weiden", BWV 208, No. 9)
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Vivaldi Variation (Arr. for Piano from Concerto for Strings in G Minor, RV 156 by F. Christl)
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Der Herbst - Die Vier Jahreszeiten (Autumn - The Four Seasons)
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String Quintet in E Major, Op. 11 No. 5, G. 275: III. Minuetto
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Der Winter - Die Vier Jahreszeiten (Winter - The Four Seasons)
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Bagatelle No. 25 in A Minor, WoO 59 "Für Elise"
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Der Frühling - Die Vier Jahreszeiten (Spring - The Four Seasons)
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Rinaldo, HWV 7: Lascia ch'io pianga (Arr. for Piano)
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Ouverture in C Major: I. Allegro con spirito
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Goldberg Variations, BWV 988: 9. Canone alla Terza. Moderato
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Oboe Concerto in D Minor, S. Z799: I. Andante e spiccato
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Ballabili per il film "Il Gattopardo" (1963) (revisione a cura di Nicola Scardicchio): 3. Controdanza
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Partita No. 6 in E Minor, BWV 830: IV. Air
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Air on the G String from Orchestral Suite No. 3 in D Major, BWV 1068
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Partita No. 1 in B-Flat Major, BWV 825: II. Allemande
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Piano Sonata No. 21 in B-Flat Major, D. 960: III. Scherzo. Allegro vivace con delicatezza
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Paganini Variation (Arr. for Violin & Piano after Rhapsodie on a Theme of Paganini, Op. 43 by Jarkko Riihimäki)
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Morning Mood Variation (Arr. for Piano from Peer Gynt Suite No.1, Op. 36 by Ketan & Vivan Bhatti)
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Chopin Raindrop Variation (Arr. for Violin & Piano after 24 Preludes, Op. 28, No. 15 by David Reichelt)
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Four Seasons Variation (Arr. for Piano from Violin Concerto, RV 297, "Winter": II. Largo by Svetoslav Karparov)
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Satie Variation (Arr. for Violin & Piano after Gymnopédie No. 1 by Svetoslav Karparov)
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Mozart Variation (Arr. for Violin & Piano after Eine kleine Nachtmusik, K. 525 by Wide Eyed)
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Tchaikovsky Swan Lake Variation (Arr. for Violin & Piano after Swan Lake, Op. 20, No. 10 by Ketan & Vivan Bhatti)
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Die Zauberflöte: Aria Variation (Arr. for Piano from K. 620 by Vivan und Ketan Bhatti)
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Ravel Variation (Arr. for Violin & Piano after Pavane pour une infante défunte, M. 19 by Ketan & Vivan Bhatti)
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In the Bleak Midwinter Variation (Arr. for Piano by Olivia Belli)
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Beethoven Variation (After String Quartet No. 13, Op. 130: II)
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Joy (After Bach's Jesu, Joy of Man's Desiring, BWV 147, No. 10 and Beethoven's Symphony No. 9, Op.125: IV. "Ode to Joy")
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Bach Variation (Arr. for Violin, Piano and Orchestra after Violin Concerto in A-Minor, BWV 1041: II. Andante by Florian Christl)
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Zdes' khorosho ('How Fair This Spot'), Op. 21, No. 7
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Serse, HWV 40, Act I: Ombra mai fu (Arr. for Cello and Piano)
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Sarabande Variations (from Suite in D Minor, HWV 437): Variation VIII
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Goldberg Variations, BWV 988: Variatio 7 a 1 ovvero 2 Clav. Al tempo di Giga
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Piano Sonata No. 8 in B-Flat Major, Op. 84: II. Andante sognando
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7 Gypsy Songs, Op.55/B.104: No. 4, Songs My Mother Taught Me (Arr. for Violin & Piano by Augustin Hadelich)
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Sonata for Clarinet and Piano No. 2 in E-Flat Major, Op. 120: II. Allegro appassionato
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Oblivión (Arr. for Trumpet & Orchestra by Bob Zimmerman)
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Violin Concerto in E-Flat Major, RV 253: III. Presto
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Concerto for Trumpet & Orchestra in A-Flat Major: III. Meno mosso
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Symphony No. 2 in E Minor: III. Un poco adagio cantabile
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Godzilla - Symphonic Fantasy: No. 7, Godzilla vs. Kingghidorah (Excerpt)
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On the Overgrown Path, Book 1, No. 7: Dobrou noc!
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Suite bergamasque, L. 75: No. 3, Clair de Lune (Arr. for Cello & Guitar by Isang Enders)
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String Quartet No. 7 in F Major, Op. 59, No. 1 "Rasumovsky Quartet": IV. Allegro
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Tarik O'Regan: A Celestial Map of the Sky