Even regardless of whether state licensing is sufficient (plenty of comments indicating it is not), how do you verify an ad based on these documents? Is there

Even regardless of whether state licensing is sufficient (plenty of comments indicating it is not), how do you verify an ad based on these documents? Is there a government database you can query? Does it contain all the valid contact details, e.g. website, phone numbers, so that they can actually verify whether an ad comes from the actual entity. Ignoring the latter part will just land us in the same place as before.