No, I say that I have not see any credible evidence—yet! And as far as the "extra-Biblical Church" part, that's an oxymoron de jour. It depends what you consider the "Bible." The early Church, the original Church considered what you consider "Apocrypha" as part of the Bible, and included it in the canon. By removing part of the canon of the original Church, one cannot claim that same Church now being "extra-Biblical."
The second problem with your statement is that you seem to believe that the Bible "proves" (or is capable of "proving") the faith! It proves nothing, nothing more than the Koran proves Islam to be a "true" religion.
I didn't know that you had read the Koran so you would know enough to say that. While I have not read it, I do know someone who has and he tells me something very different. He tells me that the Koran is a comparatively stale read, that we should worship Allah basically just because. In contrast, the Bible shows man the nature of himself. We see stories that are thousands of years old, but are still just as true today as when they were written. We can point to them and say: "That's me!". My friend tells me the Koran doesn't read like that at all. The Bible matches "what is", making it unique.