The CKC is a good registry, they do not just let you send in any papers and register under them. They require that they be purebred and that dams owner certify when bred, with whom, and of course of the the get from a breeding.
They do allow I believe, the father being from some other reputable registry.
As for two witnesses saying an outside of the CKC registry bred dog would be with breeder and vet being reliable witnesses. In any case, they do not have a large membership in New England like the AKC in NY does. Nor have they been around as long.
You can get pedigrees, memership, webiste, magazine, books on your particular interest etc on their website.
I have CKC male 3yr old, who has studded and a CKC female almost a year old whom I would like to breed shortly with healthy, sound, well marked approx 4 lb yorkie male in Massachusetts. Only have a litter a year, this is her first. The get will go CKC as this registry is most particular that the female breeder is listed in their registry. In fact the breeder of my male gave me his parents infor so I could get an ancestry pedigree and I send them in. They wouldn't even accept it, requested the original breeder request it only as she owned the those dogs, so they can be very picky about some things.
Good luck and oh the CKC does not do many sanctioned dog shows in N E area as yet so if that is a priority on your puppy's to do list may have to travel a little south for their matches.
Have a good new year!
Pat Medeiros
pmede77911@comcast.net