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 0x915a2933eddb374af493899e398c2d6afa54160d733e7cf9949b0b905ce8cce4. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10c4f036-59a3-4ce9-812d-49d72832653d.json and https://artists.proofprofile.net/proofs/artist/10c4f036-59a3-4ce9-812d-49d72832653d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Haydn, M.: Missa Sancta Theresiae / Te Deum
Fifty Years of Hungaroton (1951-2001) - Conductors
Antal Doráti: Piano Concerto - Mátyás Seiber: Orchestral Suite from "The Invitation" - Renaissance Dance Suite
Tobias PM Schneid: Symphony No. 4 "An Earth (Live)
Erno Dohnányi : Suite for Orchestra, Ruralia Hungarica & American Rhapsody