The fundamental problem with "God proof" is that the definition of God places it outside the realm of all that exists as we know it. A realm that includes all human experience, observation, cognition, and intellect. So we humans have no means of grasping or comprehending anything regarding the nature of or existence of "God". As the source, sustenance, and purpose of all that is, 'God' by definition transcends "all that is". While we do not. So we have no means of ascertaining to verify or negate that transcendent condition.
So asking for such is a waste of time, and is logically an incoherent question. Evidence, knowledge, proof, all of these are quite literally 'out of the question'. And that leaves us in the realm of faith and personal functionality, as opposed to evidence, knowledge, and proof. Like it or not, that's the only methodology left to us regarding the concept and question of "God".
It's not dissimilar to the idea of infinity. As an idea about reality, infinity exists. But does it exist as an aspect of reality unto itself? We don't know. Because we humans are not capable of perceiving or experiencing infinity. We can't observe or measure it. We can't know if it exists as anything but an intellectual ideal. Maybe it does, maybe it doesn't. But we can still USE IT as an ideal. Just as we can still use God as an ideal, whether God or infinity are an actual state, or not. Like infinity, the God-ideal becomes an actuality when we choose to make it one.