I know most of this stuff for Canada and the Canadian Copyright Act (or at
least where to find it...), but can anyone point me to any useful
information for the US on determining

a) whether a photograph is still copyright or has passed into public domain
(it's complicated in Canada depending on various things...)

b) what to do if you can't track down the copyright owner (say the
photographer or their heirs) on an old photograph that someone wants to
reproduce. I know that in some jurisdiction there are a "reasonable" set of
hoops that can be jumped through if the owner can't be found or identified.

thanks

tim

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