thumb | right | alt=Malabo Harbour, Bioko Island, Equatorial Guinea | Malabo Harbour, Bioko Island, Equatorial Guinea Black Beach () is a prison located on the island of Bioko, in the former capital
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 0xbcf7db4d6f6bb8ff0d2abaf036ffab2c7adb7ea1f2c9ea3f12dc427ac4a4bd1b. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ab05e93-8220-42ba-a074-ba8ed5107efa.json and https://artists.proofprofile.net/proofs/artist/9ab05e93-8220-42ba-a074-ba8ed5107efa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).