Mary Henry may refer to: Mary Henry (doctor) (born 1940), Irish doctor and independent Senator Mary Henry (artist) (1913–2009), American artist Mary Gibson Henry (1884–1967), American botanist Mary
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 0x683dcae139b726e079aa991fb1ce23a8d5db37d441d4e5d9a08885fb031516ab. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6a4e683-8062-4750-97d3-16b23d7aea43.json and https://artists.proofprofile.net/proofs/artist/b6a4e683-8062-4750-97d3-16b23d7aea43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).