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 0x2d45c4e7038d6b7d398ff18748c1ed7100156010c0c86a9e57d4fe33f4342c67. 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/daec2ed5-b8e0-4851-a47d-e6b98212bf4f.json and https://artists.proofprofile.net/proofs/artist/daec2ed5-b8e0-4851-a47d-e6b98212bf4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dvorak: Piano Concerto in G Minor, Op. 33 - Janacek: Concertino & Capriccio for Piano
Smetana, Dussek & Others: Works for Piano
Schumann & Mendelssohn: Piano Concertos - Dvořák: Silhouettes
Rudolf Firkušný Plays Dvo?ák, Smetana, Dussek, Benda, Tomášek,Vo?íšek
Hans Rosbaud live in New York with Rudolf Firkusny, Piano
Romantic Dinner: Classical Piano for a Romantic Evening
Milestones of a Legend: Nathan Milstein, Vol. 5
Chopin, Janáček & Mussorgsky: Works for Piano (Live)
Barber: Knoxville-Summer of 1915, Op. 24 & Four Excursions, Op. 20 - Hanson: Piano Concerto in G Major, Op. 36 (Remastered)
Mozart: Fantasia in C Minor, K. 475, Piano Sonata No. 14 in C Minor, K. 457 & Fantasia in C Minor, K. 396 - Chopin: Piano Sonata No. 3 in B Minor, Op. 58 (Remastered)
Violin Favorites - Kreisler, Tchaikovsky, Paganini, Sarasate & Beethoven: Violin Sonata No. 10 in G Major, Op. 96 (Remastered)
Mozart: Duport Variations, K. 573; Schubert: Piano Sonata No. 21 (2024 Remaster)