U.S. Copyright Office Library of Congress
http://www.copyright.gov/
Copyright Made Simple
Source: International Music Score Library Project (IMSLP)
https://imslp.org/wiki/IMSLP:Copyright_Made_Simple
MusicLegalForms.com
Visit the Contract Package for Bands & Working Musicians
https://musiclegalforms.com/index.html
Tax Issues for Musicians
Source: Howland Tax Service (U.S. & Canada
http://www.howlandtax.com/musician-tax.htm
Volunteer Lawyers for the Arts
Resources, links, and directories to legal services in the U.S., Canada & Australia
https://vlany.org/