Rufus Smith (MD) (November 19, 1766 – November 15, 1844) was a medical doctor and politician in the British colonial Province of New Brunswick, Canada. Born in Stamford in the Colony of Connecticut,
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 0x720b62f71573275b0910497594cd4c78f4f35260fac454517009ac8b9a9b74db. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0790c29-ab8b-40db-aa70-b3abdb0f49f4.json and https://artists.proofprofile.net/proofs/artist/a0790c29-ab8b-40db-aa70-b3abdb0f49f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).