You hope.
That's weird. Serious historians agree that Socrates of Athens existed, but I have yet to see any "indisputable proof" of that fact.
What exactly is "indisputable proof", anyway?
But historians (Tacitus, Josephus) DID say He lived. And history by His enemies (the Jews) say His body did not remain in the tomb. They said his disciples stole His body. His disciples (Matthew, Mark, Luke, John, and Paul) all testify that He was resurrected. So we have two alternative explanations of the historical fact of the empty tomb. Which do you find more believable? That His disciples all were martyed and died for what they knew was a lie, or that He was resurrected?
Unless there's indisputable proof that he was resurrected (And face it, there isn't. Why else is it called "Faith"?), then no serious historian will ever claim that he was resurrected.
There is no indisputable proof for many historical facts. When there are ancient documents, there are various interpretations of the accuracy of such documents. Julias Caesar's historical work has only one copy known in extent--and historians believe it. There are 8,000 copies of the New Testement of various ages, from about 100 AD to 1000 AD.
There are very few indisputable facts indeed. Even Descartes' famous "Cogito ergo sum" "I think, therefore I am", is disputed by those who believe all our behavior is deterministic and our feeling of free will is merely an illusion.
We believe what we have been taught to believe, generally, and what is consistent with our experience. Since I have experienced God in my life, I have indisputable evidence. May you also receive such evidence.