That makes perfect sense. No name, no identity found on dental records, no nothing. Just pure crazy. And the scar's from the Time War, where a temporal weapon went wrong in a way that makes every single version of his scar story actually true, even the ones he made up after the fact.

Except his DNA showed up as not in the database, not not human (unless they forgot to mention that part), so he'd have to be pocketwatched. Are there any Time Lords that act the complete opposite of the Joker?