In order for the Church to select the books of the canon ti had to be able to correctly interpret them. So, the collection and interpretation were all contained within the Church.
The Church is not above the scripture; the scipture is the collection made by the Church (presumably) based on correct interpretation (and some horse-trading to boot!).
Thus, the scripture reflects what the Church believed then and what it believes now.
Ah, but assuming we're focusing on the NT, if the scriptures, in oral or written form, only REFLECT what you say your Church believed before, then the Church is superior in its own collective mind. Which was first and which is superior, the current teachings of your Church, or the original teachings that were later written down in scripture? I think your answer must be "the Church's". We believe the opposite, as we say that God's Church's teachings should be a reflection of God's word as it was taught orally first and then as it was written down. That's what Paul taught.