@ct_bergstrom I see you have a homepage. That is the best way to do verification.

On your about page, you could add rel="me" to the link back to Mastodon.
<a rel="me" href="https://fediscience.org/web/@ct_bergstrom">@ct_bergstrom</a>

Then the link on your bio page should go to:
http://carlbergstrom.com/about.html

Or on your main page, you could add:
<a rel="me" href="https://fediscience.org/@ct_bergstrom"></a>

This will make the box with your homepage link green like the link to OpenCheck.