This reminds me of the Helen Green David Bowie Gif image (https://dollychops.tumblr.com/post/107517113745/happy-birthd... ) that got changed, tweaked, cropped, distorted and distributed by humans without attribution in all sorts of places [0] over ten years ago. I recall Mediachain (which was later acqui-hired by Spotify to help address attribution and licensing) would talk about this problem and proposing blockchain ledger approaches to help validate a media files similarity to existing content and notification to the original artist of its use. Didn’t follow them closely, but Spotify saw some value in their attribution ideas.

[0]. https://www.newsweek.com/2016/09/16/digital-images-photos-gi...

In this scenario it sounds like you're fine, and if there's confusion then the guy that cropped it out is the source of the problem.