I'm sorry to be the Bad News Bear, but unfortunately, outside the realm of pure math, there is no absolute proof, and all evidence can be either misunderstood, or outright fabricated. I could I ask one of these new fangled AI engines to make me a 4K video that resembles security camera footage of Mikhail Gorbachev stabbing Elmo to death in a 7-Eleven, and it's becoming harder and harder to determine if it was generated or actually recorded.