Depends on the proof you’re looking for. There are convincing arguments but it depends on what will satisfy you. How could I prove JFK was assassinated? Well there are mountains of proof, including video evidence. But what of that existed in 33 ad? Well we do have some evidence but it’s not as numerous as history produced today. Looking at the time period though, there is some pretty good evidence of what happened, but at the end of the day it is a conviction that only you can come to. Through my own research and experience I am convinced that he did, and through what I believe he has done in my life. But I realize that is not sufficient for some. Not even God himself was able to convince some of his divinity. I recommend the youtube video I linked, it’s a homily by a bishop about the historicity of Jesus. Not too lengthy.