certify

I'm a certified energy healer!

Mineral water must come from a certified underground spring, it must not be chemically treated in any way, and is generally under heavy regulation.

Joe Biden was certified president.

You can think of it like a Wikipedia for proven truth, where every edit is computationally certified for correctness.

This is why, when it comes to the most important plane in the world, you don't go certified pre-owned.

When all else failed, he incited a violent mob to assault the Capitol and force Mike Pence, the Vice President, not to certify the results.