Don't forget he can simply edit the winnings to make them look legit. The only proof we'd believe are the round IDs.
And don't forget the selfie!
OP should post here again and clarify what should he needed to so he can enlighten us.
Otherwise don't be mean to him as we don't know what's the real story of that bragging post. Just leave this to him.
Hahaha yeah, with doing a selfie, he can remember his best time to win big money from gambling. I am sure that he wants to turn back the time to enjoy his winning for a moment. He could do whatever he wants with that money especially to buy many things that he wants.