Unclear. What is clear is that Warner&#x2F;Chappell don&#x27;t have a valid copyright claim, but due to the history of the song&#x2F;lyrics&#x2F;tune other claimants could come forward and claim to own the copyright.<p>Happy Birthday will DEFINITELY be in the public domain in 2030, because claims of ownership seem to end in 1935, however as the Warner&#x2F;Chappell claim has been debunked it might be public domain as early as 2022.<p>Keep in mind that &quot;unknown owner&quot; and &quot;public domain&quot; aren&#x27;t the same thing. At the moment Happy Birthday isn&#x27;t old enough to be public domain, there just may not be a known or established owner, so it could be &quot;de facto public domain.&quot;