> derivative work of something in the public domain is itself copyrightable I don't think this is true in most of the world. Here's a UK referience: https://c

> derivative work of something in the public domain is itself copyrightable I don't think this is true in most of the world. Here's a UK referience: https://copyrightservice.co.uk/copyright/p22_derivative_works https://copyrightservice.co.uk/copyright/p22_derivative_work... "You cannot extend the duration of copyright in a work by creating a derivative work. If the original work is in the public domain, it will remain in the public domain; you cannot prevent anyone else using the same public domain work for their own purposes."