What Science do is it answers the questions "What"
E.g.
What is the composition of an organism? or
What is the origin of man?
Religion on the other hand answers the question "Why"
E.g.
Why are we designed this way?
Why do we exist?

To answer your question, the scientific proof that God exists are the questions that Science has no answer. Science cannot create a method to answer the question "Why do we exist?". The answer to what is the purpose of life comes from a higher being which is God. There's a limit to what Science can give an explanation, that's where Faith comes in.