John Thiessen (February 23, 1906–March 25, 1978) was a farmer and political figure in Saskatchewan. He represented Shellbrook from 1956 to 1964 in the Legislative Assembly of Saskatchewan as a Co-oper
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 0xac6267124412e80454f7d42bf49847a02e3dce214f253c9e2a7b17263bedbfac. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/379c1a16-d374-4e90-b4a7-62a324801b91.json and https://artists.proofprofile.net/proofs/artist/379c1a16-d374-4e90-b4a7-62a324801b91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).