Sarah Janet Francis (born 11 January 1938) is a British oboist known for her "refined" chamber music work. She specialises in composers of the 20th century, and has given the premiere of British works
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 0x74969f8f32c4811031ecea0929d1c2fa9328bd844499944a9e631ccc1f6b94bc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70f29068-ea48-427b-b6ef-d09474a00737.json and https://artists.proofprofile.net/proofs/artist/70f29068-ea48-427b-b6ef-d09474a00737.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Crusell, C. Kreutzer & Reicha: Oboe Quintets