The Copyright Genie will walk you through the steps to determine if a work is in copyright and, if it is, when it will enter the public domain.
From the ALA Office for Information Technology Policy, a visual and interactive way to figure out if something is under copyright.
This chart, from Cornell University, outlines possible time frames for materials either under copyright or in the public domain.
Use the fair use evaluator tool in order to better understand the four factors of fair use and make your own evaluation of your use of a copyrighted work. The tool generates a PDF of the evaluation for your own records.
This is a database of copyright renewal records for US Class A (book) renewals received by the US Copyright Office between 1950 and 1992 for books published in the US between 1923 and 1963.
Use information on hand to determine whether or not a specific work is in the public domain. This calculator takes into account the potential restoration of copyright for items published outside of the U.S. due to Uruguay Round Agreements Act.
These PDF files can be used to find copyright renewal records for items that aren’t US Class A (books) renewals. Note: Copyright renewal had to occur sometime during the 28th year, however sometimes the Library of Congress could be slow in publishing said renewals. To maximize the search, look for the renewal records from the 27th to the 29th year.
This tool helps you determine if your intended use meets the requirements set out in the law and provides a PDF document for your records.
Introduction to and explanation of the TEACH Act and how it may facilitate use of copyrighted works in the classroom. This site also includes a checklist to determine if a work qualifies.
From NC State University, this toolkit explains the TEACH Act and how works qualify, and provides three different checklists to determine if a work qualifies to be used under the TEACH Act.