KG, Kg, kG or kg may refer to: Units of measurement kg, the kilogram, the SI base unit of mass , the kilogram symbol as a single character in the CJK Compatibility block kG or kGs, the kilogauss,
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 0x648d1470e12b19f98ec6886d5a9ff1597de07265c6ca844ea7f33750972bd8cb. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38e780f0-e30e-4143-8b14-72be7bf17ed3.json and https://artists.proofprofile.net/proofs/artist/38e780f0-e30e-4143-8b14-72be7bf17ed3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).