I practice due diligence to make sure that every song represented on Melody Lane is a public domain song. I do copyright searches on each title, composer, or artist before I add the files to the site. Generally for American songs I stick to those published 1922 and earlier. For European composers I try to check death rates to make sure that the composers and lyricists died longer than 70 years ago.
If you have legal proof that any song or acoustical recording on Melody Lane is not PD, please email me with the subject line: "Please remove", provide your written proof, and the piece involved will be removed within 24 hours of notice. There is no need to send a threatening "cease and desist" letter.
Just ask me. Thanks.