Jerrard is a surname. Notable people with the surname include: Alan Jerrard (1897–1968), English recipient of the Victoria Cross George Jerrard (1804–1863), British mathematician Harold George Jer
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 0x7e199e42da3dffe4e80d3e12eab5b2e2ef99a7fd276fe5ce35bcea7d2234e21d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62dc9ea4-9d1e-410a-928c-12e96ea4b34a.json and https://artists.proofprofile.net/proofs/artist/62dc9ea4-9d1e-410a-928c-12e96ea4b34a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).