John Hopkins may refer to: Politics John Hopkins (Bristol MP), member of the English House of Commons in 1601 John Hopkins (died 1732), English merchant, Member of Parliament (MP) for St Ives 171
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 0xf0d605a2b3f1218b549d418cb944d65bbec8ee8ad8605e15e740eaab07cba777. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9744e0a-8f63-48ca-8d81-2429e5ebc361.json and https://artists.proofprofile.net/proofs/artist/d9744e0a-8f63-48ca-8d81-2429e5ebc361.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).