Article: Even if you've registered your copyright, you remain responsible for making sure your rights are not being infringed. This means that if someone is using your work without your permission and in violation of one of your exclusive rights, it's up to you to make them stop.  Because things can be copied and distributed on the Internet with relative ease, you must keep a close eye on how your content is being used by others on the Internet – especially if you've posted it on a video-streaming site or have made it available for digital download. Much like having a car alarm sticker on the window of your car to keep thieves away, so, too, will a copyright notice make intellectual-property thieves think twice about copying your work.   Notice is no longer required to maintain copyright protection, but a strongly worded notice may have a deterrent effect. If you have your own website, download a badge or icon from a duplicate-content-checking site to warn visitors about stealing from you.   Install code that disables right-clicks on your blog or corrupts the content if it is copied so that it can no longer be played. A number of free tools and services online can work together to find websites where your work is being copied.  Run a search for your movie or TV show on all major search engines, and set an alert so you'll get an email when new work appears online that matches those searches. This can save you a lot of time and effort.   Add a free service such as Copygator to scan for content on the Internet that duplicates content on your blog.  Be forewarned, however, that this service might turn up a lot of false positives and not be worth the effort if you have a blog on a platform, such as Tumblr or WordPress, that allows other users to reblog your work with full attribution attached. If you've put a lot of time and money into your creations, you might consider subscribing to a service such as Copyrighthandler.com that will track your work online and automatically send customized settlement-demand letters to infringers.

What is a summary?
Understand your responsibilities as a copyright holder. Include copyright notices on all your work. Use tools that monitor the Internet and detect duplicate content. Consider subscribing to an infringement-tracking service.