At the SpokenWeb symposium at SFI I learned about a web site RightsStatements.org. This site provides example rights statements to use and put on the web. For example In Copyright – Rights-Holder(s) Unlocatable or Unidentifiable. These often use American language rather than Canadian language, but they are a useful resource.
Another, better known source for rights statement is Creative Commons, but it is more for creators than for cultural heritage online.