So for me there's no way to confirmed it.
And even you approach and ask them how the procedure went, it's unlikely they'll answer it. Well, if I'm a winner, I won't be interested anymore to know how I've won with such.
Although some sort of verification needed to be done by them in able to verify and confirm that the winners deserve it. It's a lot of work if the winners numbers are a lot, coming from hundreds to thousands.
That's a lot of time needed for them check each of them and somehow it's a thought that counts for someone like OP. But as the majority wouldn't think of it especially if they're picked and part of the list.
If you are a winner then you wouldnt really be raising up some questions because who would be the one to raise up such concern when you are included with those selection? You are just finding
yourself into some possible argumentation which would be ending up on voiding your win and would choose up for another winning.This is why it would really just that normal that you wouldnt
be raising up questions but for those people who hadnt been chosen then that people are the ones who would be raising up questions in regarding with the results which is something
not that shocking.