Antonín Tučapský (27 March 1928 – 9 September 2014) was a Czech composer. From 1973 until his death he lived in the United Kingdom. Biography Tučapský was born in 1928 in Opatovice (part of Vyškov) i
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 0x458f80ec5ca40248f893d2064695d180562bc7d3da1283aa147ec9927b4ad9eb. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/089564a9-4af4-4997-bb8c-151f59e22183.json and https://artists.proofprofile.net/proofs/artist/089564a9-4af4-4997-bb8c-151f59e22183.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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