The copyright date of each element of this website may be different according to when it was published and whether it was the work of an individual or of an employee of a company.
Most websites give the copyright date as the date the page was rendered on the viewer's screen; that is, it's always the current year. For purposes of a bibliography, you may look for information on...
As soon as it is "fixed in a tangible medium," it's automatically protected. If formal registration is available in your country, you may wish to do so, although it is not required.