If you (or your employer) own an official website, you can verify your account on Mastodon as official. You insert some specific HTML code into your own site, which makes your Mastodon profile's site link turn green.

There's a guide to doing this here:

➡️ https://fedi.tips/how-do-i-verify-my-account/

The guide also includes many troubleshooting tips if the link won't turn green.

One other thing to note: it's a bad idea to use third party verification services, as these are often used to fake verifications.