I really hate KYC. I have to effectively give my id docs and pics to strangers and I might find it in the dark web anyday. The only answer I have found to this is introducing a watermark, barely visible or sometimes clearly visible, indicating the ICO and date. If it leaks, at least it could be determined from where.
Hmmm. That is a great IDea. Are we allowed to add a watermark to a picture of our id and still have it valid? How much distortion before a watermark invalidates an ID? If you set a limit which is too lenient people can just take the area of the id containing the watermark, blur it to obsucate the original watermark and then add another.
I doubt this would work. I am sure all documents need to be clear and visible, otherwise, anyone can just find documents online and photoshop them. Some KYC verifications require you to take a picture while holding the document.