body: I know that in most of the Western world, original creative works are protected by copyright for the entire life of the author plus 70 years after the author's death. But how is the term of protection determined when there is not a single identifiable author? For example:
  
  
  * For a piece of music recorded by a four-man band, when does the +70 years part start? (presumably on the death of the last surviving band member?)
  * For a motion picture that is produced by a major Hollywood studio, involving the work of thousands of creative staff, how is the duration of copyright protection computed? Whose "life" is the relevant one for calculating life+70 years?
  
  
  
title: Copyright protection: life + 70 years. But whose life?