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 0x7ce80666d6c983b9f8998c0573db54d67e4a16176f178bb9f7e17330eb063cb1. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0add9681-025a-4272-9049-99b4f9045ed1.json and https://artists.proofprofile.net/proofs/artist/0add9681-025a-4272-9049-99b4f9045ed1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Godowsky: Piano Transcriptions of Violin Sonatas by J.S. Bach
Godowsky: Piano Transcriptions of Cello Suites No. 2, 3 and 5 by J.S. Bach
Rachmaninoff Piano Concerto No.2 & No.3 (arranged for two pianos)
Sergei Rachmaninoff: Piano Concertos No. 1, No. 4, & Rhapsody on a Theme of Paganini (Arranged for Two Pianos)
Sergei Prokofiev: Piano Conserto No. 1, No. 2, No. 3 (Arr. for Two Pianos)
Scriabin: Symphony No. 3 in C Minor, Op. 43 "La Devin Poème" and No. 5 Op. 60 "Prometheus (Trans. for 2 Pianos by Konyus, Sabaneev)
J. S. Bach: Brandenburg Concertos (Trans. for Solo Piano by August Stradal)
Tchaikovsky: Symphonies No. 4 and No. 5 (Arr. by Edward Langer)
Tchaikovsky: The Sleeping Beauty, Op. 66, (Trans. for Solo Piano) by Alexander Siloti