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 0x7ba95cc56dc89af4df367dc889e9ff8f4a0d38f36be17b30e72165966e90e140. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efd9f600-eaa1-4112-afc8-92cb4a6daf91.json and https://artists.proofprofile.net/proofs/artist/efd9f600-eaa1-4112-afc8-92cb4a6daf91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Roslavets: First and Second Sonatas for Viola and Piano - Shostakovich: Sonata for Viola and Piano, Op. 147
Viola Sonata No. 2: III. Allegro con spirito
Viola Sonata in F Major, Op. 147: I. Moderato
Viola Sonata in F Major, Op. 147: II. Allegretto
Viola Sonata in F Major, Op. 147: III. Adagio
Viola Concerto No. 1 in D Major: I. Allegro
Viola Concerto No. 1 in D Major: II. Andante moderato
Viola Concerto No. 1 in D Major: III. Rondeau
Viola Concerto in D Major: III. Rondo: Allegro
Viola Concerto in B-Flat Major: I. Allegro con spiritoso
Viola Concerto in B-Flat Major: II. Poco adagio
Viola Concerto in B-Flat Major: III. Rondo: Allegro
Viola Concerto in D Major, Op. 1: I. Allegro
Viola Concerto in D Major, Op. 1: II. Andante moderato
Viola Concerto in D Major, Op. 1: III. Rondeau
Viola Concerto in D Major: III. Rondo. Allegro
Viola Concerto in B-Flat Major: III. Rondo. Allegro
Symphonie Concertante in B-Flat Major, Ben. 112: I. [Allegro]
Pleyel: Symphonies Concertantes / Violin Concerto in D major
Symphonie Concertante in B-Flat Major, Ben. 112: II. Rondo moderato