Daniel Andrew Biro (born 1963) is a composer, keyboard player, songwriter and producer based in London. He is the founder of the Sargasso record label, established in 1993. Biro (pronounced Bee-ro) ha
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 0x7593da0c3fd904e8a2558f61608605176faba2f68d71d434f0eba02c6344c580. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d180f868-9e72-445d-96c6-e4b534585f9c.json and https://artists.proofprofile.net/proofs/artist/d180f868-9e72-445d-96c6-e4b534585f9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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