See rightsstatements.org for more info: https://rightsstatements.org/page/1.0/?language=en#collection-otherResources:
- Copyright and Cultural Institutions
- Copyright Term and the Public Domain in the United States
- International copyright
- rightsstatements.org
General information specific to Digital Collections:
- No copyright-US
- No known copyright-post 1923
- Example record
- Public domain
- Pre-1923 only
- No known copyright
- Lack of evidence for renewal
- Example record
- Check year of renewal (year required and following year)