Public Domain
Due to changes in copyright law over the years and variances by content type, it can be tricky to determine whether a work is in the public domain. Luckily, there are tools and guidelines that can help. If you're still unsure of a work's copyright status, remember to document your "good faith effort" to assess the work and your use of it. Contact a librarian if you need more help.
** Click Here to Download a Template for Documenting Your Analysis **
Guidelines to start with:
Tools
What is always in the public domain?
Orphan works are "works protected under copyright whose owners are difficult to locate" (Nolo's Plain-English Law Dictionary).
Orphan works pose a problem because a large amount of history can be lost if works are not reproduced or preserved due to the inability to secure permission. Though no legislation specifically details how to deal with orphan works, the U.S. Copyright Office has issued a report to study the issue and propose solutions.
Little Orphan Annie illustration by Ethel Franklin Betts from Project Gutenberg