thumb|Bice Osei Kuffour Bice Osei Kuffour (born 17 November 1981) is a Ghanaian hiplife musician, known popularly by the name Obour, which means "stone" in the Akan language. He is the immediate past
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 0x262918c21bde9f8bf3e06db363d3e8df9d9f05a0b6be4120d40c1aa05dc7e072. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6956cbda-8e31-42f7-aa87-0b8e7c5c7dfd.json and https://artists.proofprofile.net/proofs/artist/6956cbda-8e31-42f7-aa87-0b8e7c5c7dfd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).