Certainly the use of AI to falsify content in this way is a danger, although currently with a little attention you can differentiate an image generated with AI from a real one, there are many people who do not stop to look at these things in detail, when the brain is not exercised is conditioned to follow the easiest way to an analysis, and that would be to be manipulated by a fake, even more so with images so close to reality, social networks are effective weapons to manipulate the masses with these forgery mechanisms, it is important to have a response and verification mechanism to these systems. The blockchain as you comment, is an interesting way to get out of the way in the near future in which every day greater advances in these technologies are achieved. Regards