Chris Clark may refer to: Chris Clark (reporter) (born 1938), American reporter, former lead news anchor for WTVF-TV Nashville, Tennessee Chris Clark (writer) (born 1945/6), British author who writ
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 0xefca78d86746b1f4467a541f204cc9742b69d65a155c2a80209919f74026e59f. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da8d119a-48cc-41c8-97c6-5a00990bca91.json and https://artists.proofprofile.net/proofs/artist/da8d119a-48cc-41c8-97c6-5a00990bca91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).