Anything that can be proven?The Old Testament itself told about a New Covenant to come. The New Testament has fulfillment of things foretold in the Old Testament.
You cannot prove (and this isn't even in the Tanakh, but let's suggest it were) a virgin birth.
You cannot prove miracles, and even if you could a false prophet can perform miracles
You cannot prove he rose from the dead (and even if you could, this is not a messianic requirement).
You cannot prove he came in a vision to Paul.
You cannot prove, and again it is unscriptural, that he will come back a second time to do all those things even you acknowledge the Messiah should have done the first time.
Speaking of which....
I'll come back to the question I keep asking Christians:
What did Jesus actually do and what qualified him to be the Messiah that can be proven? He wasn't a King, he did not unite the lost tribes, he brought no peace and he never had any children.