If it was listed you'll be able to see it in the directory (possibly not immediately, since it can take a few days for the servers to catch up with edits). Searching for a site's URL works best if you don't include http:// or www in the search.
But no, the hit in your server logs doesn't necessarily mean that the site was added. As Jim said, it doesn't even necessarily mean that a human visited it, since hits from editing tools can also show. Oh, and of course an editor can review it without a dmoz.org referrer showing in your logs.
(but I cant in search dmoz)
