Lev or LEV may refer to: People and fictional characters Lev (given name) Lev (surname) Currency Bulgarian lev, the currency of Bulgaria from 1880 to 2025 Places Lev, Azerbaijan, a village Lev (cr
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 0x51719b080fcf0c6108d24dd87169580096e8bd059ef6fd2173530b36487dd115. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0fb3fad-6b58-4546-88b3-d22b5aef9faa.json and https://artists.proofprofile.net/proofs/artist/d0fb3fad-6b58-4546-88b3-d22b5aef9faa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).