I've never asked for proof. All I have asked for is independently verifiable evidence to support assertions. There is no such thing as absolute proof.
You can present independently verifiable evidence to support the existance of the universe.
(OTOH -- as I mentioned somewhere down the pike, there are writers, such as Paul Davies, who do present such evidence. As I've learned from experience, I have the background to understand them, but not argue them clearly. I refer you to such literature.)