Information gleaned from this article from PC World:
Copy Controls: How Far Will They Go?
http://www.pcworld.com/news/article/0,aid,124062,00.asp#

To find out if Sony's invasive DRM software is in your PC, Mark Russinovich advises users to choose Run from the Start menu, then type the following into the box that appears:

cmd /k sc query $sys$aries (copy and paste)

If the response is 'STATE: 4 RUNNING', you have the software. If you see, instead, 'The specified service does not exist as an installed service,' then you're clean. (Note that only Windows systems are vulnerable.)

I got the specified service does not exist message, but then that is what I expected.

I am still using Sony DVD-R blank media. Unfortunately, that is the only brand I have found that my Toshiba RD-XS32 will use with any reliability.