thumb|Latin America. URSAL (, Union of Socialist Republics of Latin America) is a term coined in 2001 by Brazilian sociologist Maria Lúcia Victor BarbosaOriginally, she used the pejorative word Republ
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 0xdfeaa83affd416ca81086eab789154e705a179f5b6c2d594143752995c547d8f. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e172d86a-b8ab-40da-9a39-5b4f7c200cf4.json and https://artists.proofprofile.net/proofs/artist/e172d86a-b8ab-40da-9a39-5b4f7c200cf4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).