thumb|upright|Femmes fatales were standard fare in hardboiled crime stories in 1930s pulp fiction. A ( , ; ), sometimes called a maneater, Mata Hari, or vamp, is a stock character of a mysterious, be
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 0x86b188749a2ab689e56172e520e1a4c7edf64ea8ba150c1ccda2065aae6f2f41. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0435f6ae-9607-47a3-952c-017f4c1c4eb5.json and https://artists.proofprofile.net/proofs/artist/0435f6ae-9607-47a3-952c-017f4c1c4eb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).