It is important to note that when the Old Testament was codified, this is the scripture that Jesus, Paul, Peter, and the Bereans who did not trust Paul and his tradition.

Later the New Testament was copied and spoke aloud in the various churches in congruent with any tradition.

There are over 23,986 manuscripts of the New Testament which shows that they were transmitted and translated into many churches to be read and disseminated in the lives of the Apostle's. The New Testament was already accepted as authenticate before any council codified it.