Jade Linsey Johnson (born 7 June 1980) is an English retired track and field athlete, specialising in long jump. She represented Great Britain at the Summer Olympics in 2004 and 2008. She placed fourt
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc49372cdf20c382326b136fd9548a95119f706520f0137eded8212127d405. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b572e16-189e-46df-b04d-c7023588b666.json and https://artists.proofprofile.net/proofs/artist/9b572e16-189e-46df-b04d-c7023588b666.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).