Welcome to KAT's secure distributed black belt database. You can enter a KAT black belt number (not Kukkiwon) below and click 'Verify Blackbelt'. Most have not yet been added due to cost, but you can try number 214 as an example.
Accessing the data is free, but you must first connect to the blockchain. We recommend using Metamask, which is a free extension for Google Chrome.
If you would like to learn more or interact with the contract and ABI directly (to avoid having to trust this site) the details are at Colorado Martial Arts News.