Easy. Automatic copyright lasts until 5 years after the creator's death (or 10 years total for works by corporations). You can extend copyright indefinitely, bu

Easy. Automatic copyright lasts until 5 years after the creator's death (or 10 years total for works by corporations). You can extend copyright indefinitely, but there is a fee that increases exponentially with time. I'd suggest $100 for years 5 through 10, and $1 billion for years 75 through 80.