It used to be you could put a quote next to a picture of Lincoln and that meant he said that quote and then we collectively got wise that this wasn't how realit

It used to be you could put a quote next to a picture of Lincoln and that meant he said that quote and then we collectively got wise that this wasn't how reality worked. Except if it is a website with pictures next to a claim of a creative commons license. How can you ever be sure a digital asset authentically has the license someone puts on the page?