Jack Christopher Allsopp (born 12 May 1975), known by the stage name Just Jack, is an English musician from Camden Town, London. He first came to prominence with the release of his 2007 single "Starz
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 0x40a8a49c1f4adb4acaf4006f3e6d2ed12e17429f7eb32d420e1c5dbf0ff3c7e1. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28090be1-4caa-4a38-a0a7-a45d22816db6.json and https://artists.proofprofile.net/proofs/artist/28090be1-4caa-4a38-a0a7-a45d22816db6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).