BLC, Blc or blc can refer to: Code Belo Corporation (NYSE stock ticker BLC), a former Texan broadcasting company Brasil Central Linhas Aéreas (ICAO airline code BLC), a defunct airline × Brassolae
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 0x9839af22cba864df82a28ec01adff7cb0823c923d4c7342805af36cbb698ed9b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df1d1b06-2fe5-4103-bf54-abbc4e837b05.json and https://artists.proofprofile.net/proofs/artist/df1d1b06-2fe5-4103-bf54-abbc4e837b05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).