Well i am gonna say no this can't be him due to them lacking any kind of similarities or anything close and this old man wished for Shirohige's death but as Scopper was a pirate he wouldn't want such a thing to happen especially to a rival of Roger.

This theory has been out for a while and the only reason is because they both wear sunglasses

Was that the old man in the bar during loguetown?

No, this is a dude who was shown during marine ford

That man is bitter asf and he seem to hate pirates or rather Whitebeard

I think its cap.

Well, people of the past. Sadly that's not him