The Broker is a suspense novel written by American author John Grisham and published in the United States on January 11, 2005. The novel follows the story of Joel Backman, a newly pardoned prisoner w
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 0xa7e0206b711cda5c39f04f499e3b5846a043b03f968c71ddd7ea6973685f3b23. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45ddb636-1227-47ab-b4d2-6dc2dfe015bc.json and https://artists.proofprofile.net/proofs/artist/45ddb636-1227-47ab-b4d2-6dc2dfe015bc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.