Ioan Gruffudd (; ; born 6 October 1973) is a Welsh actor. He is known for his roles in film and television series in the United Kingdom, the United States, and Australia. Gruffudd became known for hi
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 0xd331a41fc8c043b04164da05e115b1ae502509a62d569fa6c52397a9363e3d97. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32.json and https://artists.proofprofile.net/proofs/artist/377ca9be-9d7e-4ac7-9962-1d3f0e4f8c32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).