Sharing a downloaded from lot world

Vines12

So I have a saved world that I would love to share but Im not sure I can because of copyright issues. The world residential and some community lots I downloaded from creators in the gallery and renovated them to my own liking a bit. Now I was making a list of all the creators lots I downloaded so I can credit them, but Im still not sure if its considered plagiarized. Is their a fast way to find the creator of a lot besides saving the lot to your own tray?