Why know your copyright basics?
Your work is protected as soon as it is fixed in a tangible form, but if someone copies it, you will have to show that it is yours and since when. In the United States, registering a U.S. work with the Copyright Office is also required before you can sue, and registering early gives you the strongest remedies.
To keep evidence of the date of your work, a copyright filing with a public notary stores it with a certified date. To warn others, create your copyright notice in one click.