thumb|alt=King Radio ca. 1937|King Radio ca. 1937 Norman Span, known as King Radio, was a top Trinidadian calypsonian active in the 1930s and 1940s. He was a waterfront worker in Port of Spain when h
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 0xee84bd7ebf18c2f852ebf47bf1e6914a85518b5b50507fbb172346a6c9fc2a3e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3a5cf9a-201a-4bbf-a277-cc2dd7762777.json and https://artists.proofprofile.net/proofs/artist/e3a5cf9a-201a-4bbf-a277-cc2dd7762777.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).