I think it&#x27;s simplest to tax copyrighted intellectual property like other property such as real estate. If you want to maintain it beyond some standard copyright term. (and make that term shorter than it is today)<p>So if one wants to continue to hold some copyrighted material out of the public domain for longer than the original term, sign up on a form to list the property. The gov&#x27;t audits the value of that property and takes some small percentage of that value.