Wow! There is a easy way to find out. Why so complicate?

If you were stopped by a police, the police need to radio the center to find out your car registration based on your plate, and check your record.

All you need to do is ask for record for the radio. The person who answered will ask the badge number of the police. There is your answer.

No police will approach a driver of a car without call the station first. It's a safety rule.