[Xeoncross]

I am afraid the sheer volume of research on the topic of the canon of scripture is more than I'll ever be able to consume. There are hundreds of books and videos on the subject. If you are really curious then you should probably check them all out. icr.org, carm.org, gotquestions.org, etc...

I'll add that we have thousands of copies and fragments of the bible with nothing more than small changes in spelling. If anything was changed, we would know from the differences in the copies (unless every nation all colluded to have the same bible from day one). In fact, even the Jews would have to have been in on it even though they deny Jesus is their Messiah. (See the dead sea scrolls)

I only know of one "council" where they "decided" on what was in the bible. The Council of Nicea, where they affirmed what was already accepted as canon.