Rob Kasunic, principal legal advisor to the US Copyright Office was very generous in giving some time (http://www.sitepoint.com/article/interview-copyright-internet) to me to discuss how copyright is evolving in the online atmosphere.
Especially in view of the Internet, managing our originally authored content — regardless of its digital medium (code, data, graphics/photos, music, etc.) — can be time-consuming and perhaps an endless battle.
One tool in beta right now aims to assist at least those with web sites in tracking potential infringement. Copyscape (http://www.copyscape.com/), developed by Indigo Stream Technologies, scours the web for other sites using your content or quoting your web site(s).
The very simple interface requires just a URL to your original content and runs a query. The technical architecture leverages the Google web API’s. Copyscape makers write that while in beta it is optimized for english language use, it should work with other languages.