Esther Béjarano ( Löwy; 15 December 1924 – 10 July 2021) was one of the last survivors of the Auschwitz concentration camp. She survived because she was a player in the Women's Orchestra of Auschwitz.
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 0x1536deedf15add6f6060ef801fe3f3e1928b89b6717f25d9ca952954d5313081. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74c6b142-f145-49eb-8369-3671ceceb677.json and https://artists.proofprofile.net/proofs/artist/74c6b142-f145-49eb-8369-3671ceceb677.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).