Copyscape has been down for some days
I searched for another tool and I think this one here is a pretty good free alternativeService Update - Sunday 7th March - 2.15pm EST. Copyscape is not currently returning results due to a network issue outside of our control.
We sincerely apologize for the inconvenience, and are working to resolve this as soon as possible.
plagium.com
plagium.com/index.cfm?mode=url