KB, kB or kb may stand for: Businesses and organizations Banks KB Kookmin Bank, South Korea Kaupthing Bank, Iceland Komerční banka, Czech Republic Kasikornbank, Thailand Karafarin Bank, Iran
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 0x4cf62c17fd3fd7b44b70839c03d8736de65c7278c0577197c9e3f54f38ee00e9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7569427e-6332-4b40-a0eb-b68c708f59d5.json and https://artists.proofprofile.net/proofs/artist/7569427e-6332-4b40-a0eb-b68c708f59d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).