Sarah April Louise Baxter (born 25 November 1959) is a British-American journalist. From 2013 to 2020, she was the deputy editor of The Sunday Times. Early life Baxter was born on 25 November 1959 in
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 0x7782c14aeb1536041c436fb150016f82caa1f2cddb4c70b26512ec9aeff87dc3. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1d4c2e0-7b16-4ac6-8afd-668a319e675d.json and https://artists.proofprofile.net/proofs/artist/e1d4c2e0-7b16-4ac6-8afd-668a319e675d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).