I don't suppose "the lad 'imself" is slaving over a hot Wordpress keeping is website up to date. But it is his official site, put out there in his name, and the copyright claims are made in his name. Are you seriously suggesting that one of the greatest stars of 20th century music has no influence over his people?

By the time Dylan's version of Canadee-i-o was released in 1992 Nic Jones had suffered his terrible accident and was unable to work, and I doubt he had either the inclination or resources to challenge it. I also doubt whether Topic Records would have been inclined to take on the mighty Sony Corporation. But then, Nic is not the only person on that album to have their contribution ignored.

In any event, this is not about legal rights, important though those are. It is about having the basic courtesy to acknowledge your sources and not to claim credit for someone else's work.