[exikyut]

This is an excellent idea and simple but moderately expensive for anyone to set up.

Just have a site fetch resources from every single hosting provider everywhere. A 1x1 image would be enough, but 1K/100K/1M sized files might also be useful (they could also be crafted images)

The first step would be making the HTML page itself redundant. Strict round robin DNS might work well for that.

But yeah, moderately expensive - and... thinking about it... it'll honestly come in handy once every ten years? :/