In this case, archiv.* might be your friend, since they have time stamped copies.

That would somewhat work for some limited things for a limited time, but I feel like this is all just asymptotically approaching the inevitable conclusion that we cannot trust essentially anything online anymore because special interest (corporate, political, etc) have abused LLMs.

I think near term this feels like something bad for individuals because we can no longer find truthy information. But longer term this is going to be an issue for the same special interests, as people normalize to this and longer view the internet or media as a place they can get reliable information.

I really do not think children born today are going to think “let me just look up reviews for a product online” or even “let me just ask AI to summarize reviews” in 20-some years when they have purchasing power, because it will be ubiquitously known that nothing written online can be trusted, and AI is just ouroborosing itself (and a few more decades of increasingly desperate and short-sighted advertising/over-productization by the controlling corporations).