John Hampson may refer to: John Hampson (writer) (1760–1819), English religious writer Jack Hampson (1887–1960), Welsh footballer John Hampson (novelist) (1901–1955), English novelist John Hampson (m
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 0x04d851f16c5de77d3a667d0faf861b0a61a7d658a226aa84f31344a3887f32c5. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9d0bd63-5ae3-41fb-8869-54db4d01e304.json and https://artists.proofprofile.net/proofs/artist/e9d0bd63-5ae3-41fb-8869-54db4d01e304.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).