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 0x4c9794ac362292b94d8dda290f9156a148c143ab77aa1a1a50608be4af3e8915. 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/e6650e1a-393a-4f87-8ed0-c0d64c13fb40.json and https://artists.proofprofile.net/proofs/artist/e6650e1a-393a-4f87-8ed0-c0d64c13fb40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Quartet No. 1 in G Minor, K. 478: I. Allegro
Piano Quartet No. 1 in G Minor, K. 478: II. Andante
Piano Quartet No. 1 in G Minor, K. 478: III. Rondo
Piano Quartet No. 2 in E-Flat Major, K. 493: I. Allegro
Piano Quartet No. 2 in E-Flat Major, K. 493: II. Larghetto
Piano Quartet No. 2 in E-Flat Major, K. 493: III. Allegretto
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
Zigeunermelodien, Op. 55 (B. 104, S. 73): No. 4, Als die alte Mutter (Arr. for Cello & Piano by Laura van der Heijden)
Mért is mondod, hogy nem szeretsz, Op. Posth. No. 1: Mért is mondod, hogy nem szeretsz, Op. Posth. No. 1
Vékony a pókháló, Op. 1 No. 9: Vékony a pókháló, Op. 1 No. 9
Navždy, Op. 12 No. 1: Navždy, Op. 12 No. 1
Five Pieces for Cello and Piano, Op. 25: I. Prelude
Five Pieces for Cello and Piano, Op. 25: II. Valse
Five Pieces for Cello and Piano, Op. 25: III. Intermezzo
Five Pieces for Cello and Piano, Op. 25: IV. Aria
Five Pieces for Cello and Piano, Op. 25: V. Scherzo
Choral Hymns from the Rig Veda, 3rd Group, Op. 26: No. 1. Hymn to the Dawn (arr. J. Lloyd Webber for 4 cellos and harp)