Tomorrow is 180 days before we go and so I am all ready to book my ADRs!!

However, I have never done this 180 day thing before - how do I prove that I have a hotel reservation as I have booked via Virgin and not directly with Disney? Or is that facility only available for those who booked directly with Disney? The Dining Reservation system is down for maintenance this morning and so I can't do a dummy run in any way.