Well, not sure which registry you are dealing with but, if it is the AKC, the pedigree by itself does not have all the information required by the AKC to use that dog's name to register a litter of puppies.
Your AKC registration certificate has a date on it, the date the registration certificate is issued, that is unique to that dog, and that date changes when an adult dog is sold and the registration transfer is done. Every time you register a litter with the AKC, they will ask you for the date the registration certificates were issues for both parents. This proves that you are the dog's owner, or that you have the permission from the dog's owner to breed their dog with yours (as in stud service).
I post pedigrees on the internet, and photos too. I try to remember to add copyright information to each photo, so that nobody can re-use my photos to advertise fake puppies. Most photo editing programs will allow you to add text to a photo, and the copyright info should be someplace it can't be easily removed from the photo without messing the photo up. But don't ever, ever post copies, scans, or photos of your registration certificates. It's sad to think people are actually stooping to the level of "identity theft" - even on dogs and puppies.
As far as DNA results goes, I would have to dig one of our DNA certificates out to be 100% sure, but I think they are the same. I don't think that "certificate issued" date is on them either. Hope this helps.