Yes, I believe the 1923 date is to be certain it has passed every expiration without a ton of research and possible consequences if the research isn't done well enough, again that's only for USA law not elsewhere.
Dave At 02:59 PM 10/15/2001 -0500, Jesse Jacobsen wrote: >Or >maybe you mean there's no way to be certain that the copyright was not >renewed, and only something published before 1923 has passed every >expiration.
