K5, K05 or K-5 may be: Places Gasherbrum I, the 11th highest mountain peak in the world K-5 (Kansas highway), a state highway in Kansas K5 Plan, vast defensive belt along the Cambodian-Thai border
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 0x8c84391a9bfa59a0dccc2db9c38a216934f22d12f32215df1ed62220ad536f31. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8509e3bb-6f60-40dd-b557-3b9f18648aca.json and https://artists.proofprofile.net/proofs/artist/8509e3bb-6f60-40dd-b557-3b9f18648aca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).