Shlomo Yitzchaki (; – 13 July 1105), commonly known by the Rabbinic acronym Rashi (), was a French rabbi and commentator who authored comprehensive commentaries on the Talmud and Hebrew Bible. Born
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 0x371feb2463c3042992253e8a0dfdd7616b16cb7800e286bbec93d13770bae9f0. 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/71bec628-0ac6-47f4-bc2a-9815b28e717c.json and https://artists.proofprofile.net/proofs/artist/71bec628-0ac6-47f4-bc2a-9815b28e717c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.