Don,
In the US, copyright notice is not required as a condition of registration, for works created on or after January 1, 1978. (Between 1909 and 1977, notice was essentially an absolute requirement for protection.) However, if it is used, then an infringer cannot use the defense of "innocent infringement" in a copyright infringement lawsuit. That defense usually results in a lower judgment of damages, if any. Therefore, use of the notice is usually recommended.
Proper notice form is:
Copyright 2016 Jane Doe, Inc.
where "2016" is replaced with the correct year of completion of the work, and "Jane Doe, Inc." is replaced with the name of the copyright owner. Using the incorrect legal entity name, a fake name, a pseudonym, etc., can have negative effect, so this is a time not to hide, and to use the true copyright owner's true name.
The following government circular (6 page PDF) goes into this in more detail.
http://www.copyright.gov/circs/circ03.pdfChris