Prove it.
I don’t have to prove it. You are the one claiming that “proof” exists. It is up to you to “prove” that your claim is valid.
I can demonstrate rationally that “proof” is a meaningless concept, however. Please feel free to advance a definition of “proof” and I’ll be happy to demolish it for you.
There really is no such thing as empirical proof. Science is about refining our perception, not about discovering absolute truth. Natural phenomena are quite real but the details tend to be very questionable.