I hope they can do a physical re-creation of his features. See how close it is to the painting. And see if he did indeed have a hunchback.
I'm a nerd like that.
I have a framed copy of this portrait.
One time when I was working at the Nebraska Department of Health (the mid-1980s), I showed it to various physicians there, as it's known to be reasonably accurate. I didn't tell any of them who it was; I just asked them to speculate upon any infirmities this person might have had.
It was uncanny; all four of them (they were questioned individually, not all at the same time) guessed some sort of childhood paralytic infirmity, such as polio, which of course would have stunted his growth and curved his back someone.
Two of them also opined it was a portrait of an uxurious monogamous male, and that was right too.