thumbnail|right|Location of Illo in the Borgu region. Illo is a town in Kebbi State, Nigeria. Pre-colonial history Illo was one of the Northern Borgu Kingdoms, small but wealthy, and it fought a numb
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 0x216cb2dae35b1d9b5a9c2da1da7d11cf98253e9049afa3fcf53d78fbadd60127. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb845771-f902-4dea-8240-9d33d4d439b0.json and https://artists.proofprofile.net/proofs/artist/cb845771-f902-4dea-8240-9d33d4d439b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).