Just like https certificate authorities, the only way to fight all the AI slop will be "trusted" camera firmware that signs every image with a full chain of trust that the output was a real physical video taken will a real device at a real location.
It's the same thing as with "watermarking" music files - it's a bunch of hot air, anybody anywhere can just play them back and recapture the analog, and if the watermark survives that then it's absolutely going to be audible.