Ian Gordon Arthur Collier (25 January 1943 – 1 October 2008) was a British actor. Collier appeared on stage in Tony Richardson's production of Hamlet in 1969 at London's Roundhouse, and at the Lunt-F
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 0x9c66e9482e01c628b1b777e7acb2b57788a1b7874fd99d55a85c86aa1263b075. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ed58e6c-e45c-4910-8738-93d7284870d5.json and https://artists.proofprofile.net/proofs/artist/1ed58e6c-e45c-4910-8738-93d7284870d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).