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 0x2ac9dd173a61b9e372de5d37c9fed083ee3ceb6b08661b7f8762350ea727668c. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23dd927c-5e51-4ef7-b188-7da317a1b24f.json and https://artists.proofprofile.net/proofs/artist/23dd927c-5e51-4ef7-b188-7da317a1b24f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fišer: The Hands. Sonata for Violin and Piano
Sonata per Leonardo for Guitar and Strings
Fišer, Bodorová, Mácha: Prague Guitar Concertos
Concerto for Piano and Orchestra /in one movement/ - Live
Beethoven, Dvořák, Fišer: Violin Romances
Krejčí: Malý balet - Doubrava: Podzimní pastorale - Janeček: Legenda o Praze - Fišer: Double pro orchestr