Who is his breeder. To be blunt, a responsible breeder, with bloodlines worth keeping, would have placed him with a contract forbidding you from breeding him unless you met certain criteria-- typically so many show points or (usually) a championship title; all required health testing such as thyroid, heart, Fanconi if parents weren't tested (which would really not the be case of a responsible breeder), elbows, hips and eyes. IF you got your dog from such a breeder, your dog is probably on a limited registration-- which means you are breaking contract to breed him, and that the puppies cannot be registered.
We all love our pets, but few need to be bred. What if your boy carriers terrible genes that could result in puppies who have horrible health problems? Do you want to do that to them, or to the people who take and love them-- trusting YOU to have been responsible? Unless you have done all the health testing, and unless the sire and dam of your dog have health testing, you don't know what your dog may pass on.
If your breeder is responsible, and you simply misunderstood the contract, the contact the breeder about evaluating, showing and health testing him. If the breeder refuses to change the registration, discuss getting a related dog if you want, or post the parents registered name and perhaps someone has knowledge of related puppies.
If your dog is from a backyard breeder, I can assure you of 2 things. First, no responsible breeder would ever want to breed to your dog. Second, you don't need to be concerned about a loss of his "bloodline" fizzling out. Enjoy your wonderful pet, take a few years learning about pedigrees, bloodlines, genetics, health and find a mentor to help you if you seriously want to breed. But if it's just to get puppies from your pet, please do the breed a favor and do not become an irresponsible breeder.