The way the registration of a fictitious business name works is that one goes down to the county business office and registers the desired name paying a fee. The name if approved is good for 5 years or so and can be renewed. The name's registration is in the county where the business does its main place of operations.I suggest that the easiest way to get an ownership right to the fictitious business name is to prepare a partnership agreement to be signed by all partners stating that the name is an asset of the partnership. The agreement needs to be dated and signed by all members concerning the production company.I suggest that you may want to consult with a business attorney about creating a properly drafted partnership agreement for your venture.