This is useful if you are dealing with works in the US

http://www.copyright.cornell.edu/public_domain/



These are useful if you are dealing with works in Canada

www.creativecommons.ca/blog/wp-content/uploads/2008/04/pdregistryca-pd_flowchart.pdf

http://www.edusource.ca/craw/PD_Wizard.html

(just on photographs)
http://vicu.utoronto.ca/archives/duplication.shtml#Copyright




(Note, that's in the US/Canada, not from. Generally, if I was – for example – dealing with a historic photograph taken in the US, but now held in a collection in Canada, Canadian copyright law would apply in most cases)


tim a

--
Tim Atherton
Assistant Curator
Musée Héritage Museum, St. Albert
(780) 459-1594
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