Yes only Copyescape.com is solution, you can check it there so if it's pass by them it's mean it's 100% original other they will show you from where it's has been copied
Quote Finder is also a good option. Just copy and paste the content in the box and if any part of the content is found anywhere else on the web it is shown with a dark yellow background.
You must use some software to checked it either copyscape since but you need to bought it ..or you can check free plagiarism software in the net
Dupfreepro is another software you can use for checking articles. Another one is http://www.articlechecker.com/
use the article words copy and paste in google search this is the another way .......................... or you can use copyscape............................