Mary Jane Kelly ( – 9 November 1888), also known as Marie Jeanette Kelly, Fair Emma, Ginger, Dark Mary and Black Mary, is widely believed by scholars to have been the final victim of the notorious uni
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 0xbe688a4560a146a45e1d3f8ceb66771dacccc3198e3f22b922b3ea0887a416ea. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9428b6a-55be-401a-943e-1c221d9b1794.json and https://artists.proofprofile.net/proofs/artist/d9428b6a-55be-401a-943e-1c221d9b1794.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).