Barrio Sur may refer to: Barrio Sur, Montevideo Barrio Sur, Panama
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 0x9b1ec547abe50a2fb799518f85a9846818be080e1c6ed1fe4e6cbdf8dd258a92. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11a83701-55de-4f9a-a4ed-0253d6885a2a.json and https://artists.proofprofile.net/proofs/artist/11a83701-55de-4f9a-a4ed-0253d6885a2a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).