Now that you've added your blog, we need to make sure that you own this blog.
Create a new post on your blog. Copy and paste the randomly generated sentence shown above exactly as it is given anywhere in your new post. Publish the new post so that it is viewable at your blog's URL.
Once this sentence is on your blog, come back to your PPP account and press the claim blog button. You can remove the post after you have successfully claimed the blog.