This listing footnote is completely false: the film has never been in the public domain anywhere. To enter the US public domain in 1985, it would have to have been released in 1957 and not had its copyright re-registered after the statutory 28-year term had expired.
The film's US copyright doesn't actually expire until 2067, 95 years after its theatrical release; in the rest of the world it expires 70 years after the death of "principal creator" lyricist Don Black, who is still alive.
See, this is why the whole world's copyright systems are extremely broken. They don't allow copyrighted works to expire for limited times (a la the US Founding Fathers' limited times as referenced to in Section 1, Paragraph 8 of the US Constitution), and instead have them expire for an indefinite amount of time, if they would want to. They also don't allow competition between studios and people over works (i.e.
The Wizard of Oz (1939)) based on source materials that are public domain (i.e. L. Frank Baum's book
The Wonderful Wizard of Oz), which are works that should be public domain by now if the copyright systems weren't so broken.
Also, current creators make money for their work while dead creators make billions of dollars for theirs in the US, which is one of the reasons why creative monopolies need to end.
If I had the choice, I'd propose that the copyright term worldwide should be around 15 to 20 years after the death of the creator, or around 45 years after release/publication date (like how the US copyright term was originally 14 years after the death of the author or 36 years after publication date), whichever expires first.