Yes there is. It's called a birth certificate and the date was December 22, 1970.
"documentation exists that she and Cruz’s father voted in Canada in 1974 when dual citizenship was not permitted."
That was four years after Ted Cruz was born and thus irrelevant.
"Canada didn't allow for dual citizenship, indicating Cruz was only a citizen of Canada."
That's according to Canadian law. But according to U.S. law, Cruz was a U.S. citizen at birth to a then-U.S.-citizen mother.
Furthermore a Pennsylvania judge ruled:
Having extensively reviewed all articles cited in the opinion, as well as many others, this Court holds, consistent with the common law precedent and statutory history, that a “natural born citizen” included any person who is a United States citizen from birth.Accordingly, because he was a citizen of the United States from birth, Ted Cruz is eligible to serve as President of the United States.
When the democrats go after him on this issue, do you think the GOPe will have his back? Heck, no. They’ll help the democrats and throw him under the bus and either install their own gracious loser or let him dangle and use the issue to beat down conservatives. Hence, the name coined for Ted by another freeper, “unipatsy.”