thumb|"The Ransom", John Everett Millais, c. 1860 Ransom refers to the practice of holding a prisoner or item to extort money or property to secure their release. It also refers to the sum of money p
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1c7b9be9bc41b86a4ca745c27026a372623fd73f9e7697171cafe53ec42379. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5709a41-3837-430e-ae3e-a0c50993006a.json and https://artists.proofprofile.net/proofs/artist/f5709a41-3837-430e-ae3e-a0c50993006a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).