Very unique way of copyrighting intellectual property. From my experience and what I learned about copyrights, is that a copyright claim doesn't need to be filed with any particular government entity, and so long as you can prove that "YOU" published the work in question, by default you are the owner of the copyright. So, for example; if I publish a time stamped news article and then someone copies it, and I take them to court for copyright infringement, so long as I can show that I published the content first, then I am the true holder of the copyright. Integrating copyright material into the blockchain is a very good way of doing this, since the blockchain can not be altered nor the time stamp can be changed. Great stuff.