KJ or Kj may refer to: People KJ Apa (born 1997), New Zealand actor and singer known for his role as Archie Andrews on Riverdale KJ Duff (born 2005), American football player KJ Henry (born 1999),
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 0xc669a3b1fb252960eab3e76e7000be05bd385157279e4b190c958a7afeaaa28c. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/973c86b7-3a0b-4501-aca1-a0f3fc031046.json and https://artists.proofprofile.net/proofs/artist/973c86b7-3a0b-4501-aca1-a0f3fc031046.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).