John Napier Wyndham Turner (June 7, 1929September 19, 2020) was the 17th prime minister of Canada, serving from June to September 1984. He served as leader of the Liberal Party and leader of the Oppos
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 0x8867d202b3f8180ea0b4cb648b53e2b06b6ebc2c84081b5943d8017ca387ffb4. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbf1b4a7-db8b-4df9-b31d-9576f80d8f2c.json and https://artists.proofprofile.net/proofs/artist/bbf1b4a7-db8b-4df9-b31d-9576f80d8f2c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).