I just know that to get any document that is considered proof of citizenship, outside of naturalized citizens, it is required to provide a birth certificate. So if it is deemed that that is not what the constitution says, then none of us are citizens or have a way to prove anything, unless I suppose we have a naturalized citizen somewhere in our family tree, that then passed down that "parental birthright" that I think y'all are describing was the supposed intention of the constitution.
Now, if there was an act of congress or something, you could maybe actually change how it works, and maybe have a law that says to get a birth certificate, you have to have a parent with a birth certificate, or something like that.