The plan looks okay to me too, except I wonder why you aren't using the "md5" (or "md5sum") command instead of "cksum". Is comparability of output across systems not an issue in your case?

(If you wanted to know whether files on two different systems had identical content, you'd want the md5 sum from both files; having cksum output from one and md5 output from the other isn't informative in any way.)