Who knows myfreecopyright(dot)com??

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I was checking some blogs of bloggers out there and I found this site myfreecopyright(dot)com If my memory serves me right I know some site whose related to this kind of protection. I think its was copyscape?? If you were both to choose from this two site. Which will you choose and why? I want to protect my blog from plagiarism. Your opinion is highly appreciated.