I've come across a file called: albumart_{9a01fcff-771b-4d90-993c-83c28f8c2b2f}_large.jpg
which is the album covers to one of my CDs. I am just curious if anyone knows which site these images come (came?) from? I know cdcovers.cc had to remove all the audio covers they hosted because of legal reasons, did covers with these types of filenames come from them? I've taken a look on AMG, Amazon and the filenames for their images are nothing like the filename of the one above.

Any help is appreciated
thanks

PS: I realize that this topic runs close to HA policy about what it allows in its post so please reply with that in mind.