Sarah Herzog (; née Hillman; b. 1896 – d. 1979) was an Israeli rebbetzin (rabbanit) and diplomat. She was also the mother of Chaim Herzog, 6th President of Israel, and Yaakov Herzog, Israeli diplomat.
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 0x7f6fb47907457733777dcd3b33e9439dec4afef02bb45a4931b60635a3851e7d. 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/9bb95703-f8dc-42fc-bb58-fa86e7c5402b.json and https://artists.proofprofile.net/proofs/artist/9bb95703-f8dc-42fc-bb58-fa86e7c5402b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).