Ezra (fl. fifth or fourth century BCE) is the main character of the Book of Ezra. According to the Hebrew Bible, he was an important Jewish scribe (sofer) and priest (kohen) in the early Second Temple
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 0xdb23edb9190d3c5f7f246570ce34fd223b4b0740b7caab437831945083603592. 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/51336850-2d62-4899-93d6-e2794da01dae.json and https://artists.proofprofile.net/proofs/artist/51336850-2d62-4899-93d6-e2794da01dae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).