Before I answer your question, which CKC are you referring to? The Canadian Kennel Club, or the Continental Kennel Club?
ETA: Thanks for answering. Speaking from someone that doesn't approve of the Continental Kennel Club, I can answer this question honesty, and I'll try to play nice, lol. People don't like the CKC because you could *literally* register a hamster if it looked enough like a pure bred dog, if you had a few pictures, and a couple signatures to back you up in that it's a pure bred dog. They don't require pedigrees, bloodlines, etc... just a few signatures, and a few pics of the dog. Therefore, a lab mix straight out of the shelter, could be registered as a pure bred lab, and then used for irresponsible breeding.
Puppy millers, back yard breeders, hoarders, etc... are notorious for getting CKC papers to justify their horrible and unethical breeding practices. Because of this, many people do NOT consider this to be a reputable or credible registry.
However, if you would still like to register with the CKC, go to http://www.continentalkennelclub.com/registration.aspx for more information. In my opinion though, in terms of papers (and I by FAR don't believe that papers make a good dog), Continental Kennel Club registration papers are worth about as much as the dog pile I stepped in when I went to check the mail this morning. And that's putting it as nicely as is humanly possible for me, lol
ETA 2: Sorry, Canine Truth's story made me think of a funny one of my own. Most people don't and wont believe it, but that's fine, I know it's truth, lol. Quite a few years ago, a friend of mine *built* a "bichon frise" out of toilet paper rolls, cotton balls, and a few other various materials (for the facial features, etc...) took a front, left and right side pics, and had a couple buddies of his sign statements saying that it was a pure bred dog. To be honest it did look real, lol. He sent the pics and the signed statements to the CKC. A few weeks later, he got registration papers for his "bichon frise". He literally has the dog in a plexi glass display box, with the papers hanging above it in a frame. As I said, a lot of people don't or wont believe it, but it's true, I swear to God. And it further proves the lack of credibility of the CKC.