If the business's Google Business Profile is connected in Business App, you will see a 'Verified' or 'Unverified' tag.
If the business's Google Business Profile is not connected in Business App, then you can check by going to the live listing on Google:
- Search for the business name in Google
- Under the Google live listing click on the "Own this business?" button, as shown below
- This opens a page that tells you whether the listing is claimed or not.