Mordechai (Moti) Kirschenbaum (; September 24, 1939 – September 25, 2015) was an Israeli media personality and documentarian. Biography Kirschenbaum was born in Kfar Saba in 1939. He studied in Parde
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 0xc1e4ea27151927e071bd1f1c7718fb7419b12b45434f541536ac4f9f7d2ad3e6. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00504a0f-be4b-47e9-893d-333bcdbafc55.json and https://artists.proofprofile.net/proofs/artist/00504a0f-be4b-47e9-893d-333bcdbafc55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).