Jacob Lee Williams (born c.1983),Serwer, Jesse (2011) "From Harlesden to Yokohama: UK reggae star Gappy Ranks", The Guardian, 7 April 2011. Retrieved 22 December 2014 better known as Gappy Ranks, is a
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 0x5306b21c4bb1238c54939eb10199fcfd5e386f35f38f353aa248092ec721c44c. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a39ebd4f-dc2e-4d3d-a481-a2252c8d4cfb.json and https://artists.proofprofile.net/proofs/artist/a39ebd4f-dc2e-4d3d-a481-a2252c8d4cfb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).