Lisa Bowerman (born 1 February 1962) is a British actress. She is best known for portraying Sandra Mute, the paramedic, in the first two series of the BBC One medical drama Casualty, and Doctor Who co
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 0x7fd82b1eb354583389238021425ff4dbb6f413c400ce38435c5e34c07a7f7b4b. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a851aca8-3a77-4a4a-b58c-d17647bf8983.json and https://artists.proofprofile.net/proofs/artist/a851aca8-3a77-4a4a-b58c-d17647bf8983.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).