Henry Blair may refer to: Henry Blair (child actor), American film and radio actor Henry Blair (inventor) (1807–1860), second African American inventor to receive a patent Henry W. Blair (1834–192
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7de06adb194c1d5b5fbd0b358f5417fa45de987d47e97a05224d627b5c28c0f. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac983377-d9e2-4c7c-8108-d2a062af313c.json and https://artists.proofprofile.net/proofs/artist/ac983377-d9e2-4c7c-8108-d2a062af313c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).