Not only is it ridiculous that there is copyright protected by royalties on music, since it is a form of revenue unrelated to labour

This is of course wildly inaccurate with regard to US law and not to be taken seriously as legal advice; one would do much better to start with:
https://copyright.cornell.edu/publicdomain

It's a table of composers dead for 70 years. In the US life + 70 will apply to works published after 1977, and works published after 1924 have a 95 year term if they have been properly renewed. "composers above this line, are already in the public domain in Canada and the USA." is simply not true. Another way to see some of what's coming up New Year's Day (again, in USA) is to peak at https://imslp.org/wiki/Category:Works_first_published_in_1924

Wozzeck, and Willan's 6 Motets, among others.

English vs Spanish naming convention confusion:

https://en.wikipedia.org/wiki/Francisco_Guerrero_Marín