Zsolt Gárdonyi (born 21 March 1946) is a German-Hungarian composer, organist and music theorist. He is the son of Zoltán Gárdonyi. Career Gárdonyi was born in Budapest, Hungary. He studied composit
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 0xe5b9ef7fc6fa50af454867ff72d872884e0d3f4cefcbd7057f8dfa7bd8b838bd. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8a845bc-339b-4744-9083-9e7bff86e1ae.json and https://artists.proofprofile.net/proofs/artist/b8a845bc-339b-4744-9083-9e7bff86e1ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gárdonyi Chorwerke - Kórusmüvek - Choral Works