At a certain point, we are supposed to expect Mashiach to come and to fulfill various prophecies.
One of those prophecies is that he will reestablish the Davidic dynasty when he claims his title as Mashiach.
This point has always been one that I struggled with because I never understood how we were supposed to truly determine a person's line to David. After the exile, the Jewish people ended up at various corners of the earth and we traversed around for quite some time.
Families lost their records, people changed their names, Jews forgot who they were and where they came from.
While DNA has changed the nature of discovering someone's family line, we lack the physical remains of David to make a determination. Even if we had such remains, I don't see how one could collect DNA without violating the sanctity of his remains.
My question is simple, besides just comparing this individual's qualities with those described for Mashiach, how would we truly determine if someone's family line goes back to the line of King David?
Is there a process planned out or is it one of those issues we won't really be able to address until a revelation at a later time in the future?