Gary Graffman (October 14, 1928 – December 27, 2025) was an American classical pianist, teacher and administrator. After he lost control of his right hand, he gave the UK premiere of Korngold's Piano
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 0x4adf41f2d67c4c5020543fc650279c9325525a64519b92d7af58b06ba3700f1a. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3788579-970a-42ec-b4ce-cf764150568c.json and https://artists.proofprofile.net/proofs/artist/b3788579-970a-42ec-b4ce-cf764150568c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gary Graffman - The Complete RCA and Columbia Album Collection
Schubert: Wanderer-Fantasie, D. 760 - Prokofiev: Piano Sonatas Nos. 2 & 3
Prokofiev: Sonates pour piano Nos. 2 & 3 - Schubert: Fantaisie, Op. 15 "Wanderer" (Mono Version)
Chopin: Piano Concerto No. 1 in E Minor, Op. 11 - Mendelssohn: Capriccio brillant in B Minor for Piano and Orchestra, Op. 22
Fauré: Sonata No. 1 in A Major for Violin and Piano, Op. 13 - Debussy: Sonata in G Minor for Violin and Piano No. 3, L. 140
Chopin: Concerto pour piano No. 1 - Mendelssohn: Capriccio brillant, Op. 22 (Mono Version)
Tchaikovsky: The Three Piano Concertos [Classic Library]
Lees: Piano Sonata No. 4 - Bartók: Suite for Piano, Op. 14 - Prokofiev: Piano Sonata No. 2, Op. 14