Some people seemed to be interested in this so I figured I would throw it out there.
In order to use copyscape for free, you must first create a blog. I suggest blogger, since it is free and easy to delete.
Once you create the blog (name it anything you want) take the content you want to check in copyscape, and post it as a blog post. Post as many posts you can fit in one page, I think the max is 10.
Then simply go to copyscape's website and put in the URL of your blog to check it. You should be able to check each URL 10 times, so in theory you could check 100 things a day.
Not to complicated.
Good luck to you guys! Wish me luck too, this is my first attempt with black hat.
Oh yeah, after you check it with copyscape, DELETE the blog or at least the content. That way the spiders wont drop by and find it. (unless you want them to)