Tadeusz Baird (26 July 19282 September 1981) was a Polish composer. Biography Baird was born in Grodzisk Mazowiecki, in Poland. His father Edward was Polish, while his mother Maria (née Popov) was Ru
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 0x1252a68d3f0686fd547e3e37b7d6277ec8fe191c6b6545c9060e2080e77d81d4. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9120308f-620c-4e79-b0e1-c7e6601dd2ad.json and https://artists.proofprofile.net/proofs/artist/9120308f-620c-4e79-b0e1-c7e6601dd2ad.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.