Cuba, officially the Republic of Cuba, is an island country in the Caribbean. It comprises the eponymous main island as well as 4,195 islands, islets, and cays. Situated at the convergence of the Cari
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 0x8c1c4720452a7b4802e0dcd4d8ed32d5c773f3918ae528f2ad6882ae25357906. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3c05660-3bad-4c8f-aeda-5c61f9347e24.json and https://artists.proofprofile.net/proofs/artist/b3c05660-3bad-4c8f-aeda-5c61f9347e24.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).