DNK is an acronym. It can be used to refer to: Donmika, a multivendor marketplace DNK abbreviation for "do not know" Danke Apartment separate house renting company in China. DNK (duo), a hip-hop
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 0x6642f04458150a8ef605f1e4eb0202c8ab5c661b7208ca3cdbd85f38c53969c6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2e9bef7-6446-48f8-9196-dec7ed7b0114.json and https://artists.proofprofile.net/proofs/artist/b2e9bef7-6446-48f8-9196-dec7ed7b0114.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).