thumb|The French prince du sang Louis II de Bourbon with his son. He was a great warrior and a rebel. He triumphed at the battle of Rocroi against the Habsburgs and saved the kingdom of his cousin Lou
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 0xc2730ada482a4c10b33ea323a1622cd4303c411cf9af504262c7fc8d53d7c1ca. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15da9512-d596-42a7-b57c-f473e17c9cab.json and https://artists.proofprofile.net/proofs/artist/15da9512-d596-42a7-b57c-f473e17c9cab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).