István Márta (born 14 June 1952) is a Hungarian composer, theater and festival director, manager of the Zsolnay Cultural Quarter. Family He has two children and two grandchildren. His wife is a cer
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fe03b91d11e62624fe9003c7922565e345b291f2c77adeef5d7aff024e385f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ae4dc62-e74a-485a-a02d-4875cadddaa2.json and https://artists.proofprofile.net/proofs/artist/5ae4dc62-e74a-485a-a02d-4875cadddaa2.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Marta: Glass Blower's Seventh Dream (The) / Tamad A Szel (The Wind Attacks) / Kapolcs Alarm
Marta: Anatomy of A Scream / The Wind Arises / Story From A Doll's House