Paul Blackman (born 7 December 1958 in Worthing, England) is a British theatrical producer and director. Career Former deputy director of the National Youth Theatre of Great Britain, Blackman in Oct
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 0x86b810e50a09e2ea78fc7452b6e2050b110f06c4d5472e9054854de6a9f397bb. Chain 2 (Bitcoin): anchored in block 953854 (2026-06-15T23:16:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02afe0ed-5141-4aea-aee8-6aa94e7b437d.json and https://artists.proofprofile.net/proofs/artist/02afe0ed-5141-4aea-aee8-6aa94e7b437d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).