Andrew Langtree is an Olivier Award nominated British stage and screen actor from St Helens, Lancashire. He is known for stage performances including Groundhog Day at London's Old Vic Theatre, and on
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 0x58e2328f675e41a173231623f75df8f4f1cc27bbc6c7d448629ac34c4740d30d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66b50b35-9e36-4a28-ab97-be544c77e447.json and https://artists.proofprofile.net/proofs/artist/66b50b35-9e36-4a28-ab97-be544c77e447.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).