If it does, the Agent will remove the content from public viewing.As far as librarians are concerned, publication date is the important date.(And, if the publisher is still in business, you may even be able to find information on their website regarding their history.) Similarly, some publishers have used different names over the years. Once a registration is completed and a claim has been cataloged, it becomes part of the public record.In countries with no central copyright registration authority, it can be difficult for an author to prove when their work was created. a copy could be deposited with a bank or solicitor. 408), registration of a work with the Copyright Office is not a prerequisite for copyright protection.Alternatively, a creator could send himself or herself a copy by special delivery post (which gives a clear date stamp on the envelope), leaving the envelope unopened on its return.
Individuals have always been able to come to the Copyright Office to inspect its public records.
If there's a significant discrepancy between publication date and copyright date, it's noted in the cataloging.
As market forces (among other influences) lead more publishers to try to lengthen the shelf life of their books by fudging on the publishing/copyright date, the appearance of "new" year copyrights moves earlier and earlier.
Many reprint publishers did not include dates, either. Some are available online; others will be accessible through your local library.
I have found that university libraries sometimes own bibliographies and other reference materials that city or regional libraries don’t (and vice versa).
Occasionally this comes up as a point of complaint on librarians' (especially catalogers') email discussion lists, but the prevailing attitude is that in 5-10 years a fudge factor of 6 months to a year won't matter in the scheme of literary output.