Simply put Copyscape helps you search for copies of your web pages on the Web and find if your content has been copied and posted by someone without due credit, linkback and in terms of usage of your content.
You can defend your site with a plagiarism warning banner to warn potential plagiarists against stealing your content. If you discover someone has stolen your content, they detail steps on how to respond to Plagiarism. Their Global Web Rights campaign provides the tools and information you need to defend yourself against content theft and copyright violations on the web. To believe more, see their press page links.
They also offer another paid service – Copysentry protects your entire site against plagiarism and content theft by monitoring the web for copies of your content and emailing you as soon as they appear.
And Copyscape works, just enter any permalink or url of you webpage and it tracks down and colour codes the copied content. You will be surprised how much of your original content is duplicated online without due credit to you. Creating original content is the best way to rise in the blogosphere. If you need free content to add to your site – try ArticleCity.
You might also try Creative Commons (CC) that offers a flexible range of protections and freedoms for authors and artists. They have built upon the “all rights reserved” of traditional copyright to create a voluntary “some rights reserved” copyright. They are nonprofit and all tools are free. Yahoo Search also offers a Yahoo Creative Commons Search that finds content across the Web that has a Creative Commons license.