On 18/01/17 15:26, John Cowan wrote:
Pace David Woolley, it is not only the *changes* but the *entire* derivative work of which you are the copyright owner. Of course you cannot prevent the making of other derivative works under license from the original author.
That doesn't seem to be the US Government position, at least during the last administration. To me <https://www.copyright.gov/circs/circ14.pdf> says that you only own the new bits, and, in fact, if you want to register the copyright, you must specifically identify in which bits you have copyright and in which you don't.
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