thumb|upright|A bottle of olive oil used in food Oil is a liquid with varying degrees of viscosity depending on temperature. Oil is any nonpolar chemical substance that is composed primarily of hydro
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 0x64acd9ecdb8c5332c8a923d3eb315e6ad14e0b21cb5609f7322d15d0ac4bb087. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e39c9bea-41bf-4ad0-82ca-8118c109eaa6.json and https://artists.proofprofile.net/proofs/artist/e39c9bea-41bf-4ad0-82ca-8118c109eaa6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).