Liza del Sierra (also spelled Del Sierra, born 30 August 1985) is a French pornographic actress, film director and producer (adult films). Biography Del Sierra was born Émilie Delaunay in Pontoise, i
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 0x5508a2a255912043ab40770b53a07411f88ef1bfa82b50a786663807f3bb841f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88bd68a8-dac8-4c70-ad62-176e8f32b659.json and https://artists.proofprofile.net/proofs/artist/88bd68a8-dac8-4c70-ad62-176e8f32b659.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).