Coulson may refer to: People with the surname Andy Coulson (born 1968), English journalist and political strategist Bernie Coulson (born 1965), Canadian actor Bob Coulson (1887–1953), American base
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 0x53e7a49a8f725c2b1316dbef78b1dd23669bc4ec9ef79c9bce73f5e35800a71b. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/381fa4ff-b285-4c30-b645-c001d9b5fd26.json and https://artists.proofprofile.net/proofs/artist/381fa4ff-b285-4c30-b645-c001d9b5fd26.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).