I hope someone does due diligence and publishes delegate names and loyalties before the vote
Early voting has been going on since 4/14. You can look at delegate candidates here.
As a KNOWLEDGEABLE Maryland resident, I can tell you that a candidate for delegate can ONLY have Trump’s name as a parenthetical next to his/her name on the ballot IF (and ONLY if) the Trump campaign has provided WRITTEN permission.
So, the only TRUMP delegates on the ballots are those the Trump campaign agreed to. So “double agents” are highly unlikely.