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 0x5de78ef7c023df3ead0710bbf9dc2d38265e921e7001fa59d5a6ca1190e63f5f. 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/3a941d9b-168d-4b71-8347-9f8b1aee358e.json and https://artists.proofprofile.net/proofs/artist/3a941d9b-168d-4b71-8347-9f8b1aee358e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brahms, Ligeti, Mozart, Schumann: Horn Trios
Mozart: Violin Sonatas KV. 301, KV. 303, KV. 305, KV. 454
Sonata for Violin and Piano in B Minor: 2. Andante espressivo
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
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Suite Italienne from "Pulcinella" - Arr. by Stravinsky & Dushkin: 3. Tarantella
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Violin Concerto in D Major: 2. Romanza - Live
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Beethoven: Violin Sonatas Nos. 1, 2, 5 "Spring" And 8
Beethoven: Violin Sonatas Op. 12, Op. 23, Op. 47
Schumann: Duet from "Phantasiestücke", Op. 88
Busoni: Concerto in D Major, Op. 35a: II. Quasi andante
Brahms: Concerto in D Major, Op. 77: III. Allegro giocoso
Mozart: Piano Quartet No. 2 in E Flat Major, K. 493: III. Allegretto
Mozart: Piano Quartet No. 1 in G Minor, K. 478: III. Rondo
Mozart: Concerto No. 2 in D Major, K. 211: III. Rondeau. Allegro
Mozart: Concerto No. 1 in B-Flat Major, K.207: III. Presto
Mozart: Sonata, Op. 1 No. 5, KV. 305: I. Allegro di molto
Mozart: Sonata, Op. 7 No. 3, KV. 454: III. Allegretto
'Figaro', Fantasia for Violin and Piano From 'Il Barbiere di Siviglia'
Nicola Campogrande: Danze della signorina Olivia
Violin Concerto No. 1 in B-Flat Major, K. 207: I. Allegro moderato
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Violin Concerto No. 1 in B-Flat Major, K. 207: II. Adagio
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Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
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Violin Concerto No. 2 in D Major, K. 211: II. Andante
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Violin Concerto No. 2 in D Major, K. 211: III. Rondeau. Allegro
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Violin Concerto No. 5 in A Major, K. 219 "Turkish": I. Allegro aperto
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Grandes Clásicos De Violín - La Mejor Música Clásica
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String Quartet No. 11 In F Minor, Op. 95 - "Serioso": 1. Allegro con brio
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String Quartet No. 11 In F Minor, Op. 95 - "Serioso": 4. Larghetto espressivo - Allegretto agitato
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Busoni: Violin Sonatas Nos. 1 & 2 & 4 Bagatelles
Violin Sonata No. 1 in E Minor, Op. 29, BV 234: I. Allegro deciso - Vivace
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Violin Sonata No. 2 in E Minor, Op. 36a, BV 244: II. Presto
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Concerto in D Major, Op. 35a: III. Allegro impetuoso
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Concerto in D Major, Op. 77: III. Allegro giocoso
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Piano Quartet No. 2 in E-Flat Major, K. 493: I. Allegro
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Piano Quartet No. 2 in E-Flat Major, K. 493: III. Allegretto
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Violin Sonata in B-Flat Major, Op. 7 No. 3, K. 454: I. Largo
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Violin Concerto No. 3 in G Major, K. 216: I. Allegro
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Violin Concerto No. 4 in D Major, K. 218: III. Rondeau. Andante grazioso
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Violin Sonata in E Minor, Op. 1 No. 4, K. 304: II. Tempo di Menuetto
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Cantabile for Violin and Piano in D Major, Op. 17
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Busoni: 4 Bagatelles, Op. 28: III. Wiener Tanzweise
Busoni: Violin Sonata No.2 in E Minor, Op. 36a: II. Presto