I spent the better part of yesterday afternoon flipping the pages of my new 5D Mark II's manual, trying to figure out how to add a copyright notice and my name to its EXIF shooting data, with no success.
A friend with infinite patience (and truth be told, doubly so because he's not a 5D Mark II owner) took the time to really read the relevant part of the online manual, and suggested that I ought to install the EOS Utility software instead of using the CD as a coaster as I usually do.
To cut a short story even shorter, the copyright notice and my name are now embedded in each image's EXIF.
As a public service to those of you who are manual-phobic like me, there's also a link of the Canon Digital Learning Center (Gee, who would have thought to look there?) that explains all this in details much better than I can.
My thanks to Ralph Childs, who's a patient man.
PS. I've been testing the camera's video capabilities, and immediately concluded that its built-in microphone's quality is limited. So I've been using the external Sony ECM-DS30P stereo microphone. It juts out from the camera's side, but the audio quality is infinitely better.