Mary Johnson may refer to: Writers Mary F. Johnson (1779–1863), English Romantic poet Mary Theresa Vidal (born Johnson, 1815–1873), English novelist Mary Coffin Johnson (1834–1928), American act
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 0x551c73d9bbb14aba539adbe6097db460f52c2aa427a64d7e50b7543a45ab51a3. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/813a17dc-8d21-4cd5-9a1b-485d65729da6.json and https://artists.proofprofile.net/proofs/artist/813a17dc-8d21-4cd5-9a1b-485d65729da6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).