how to register original songs ?

[Al Ram]

Friends

My 30 year old son has some original songs he has composed and producing . . lyrics, melody, arrangement, etc.

He asked me but I did not know . . . so i am asking here . . .

Anyone knows how to register songs ?   
a) USA
b) Mexico
c) internationally
d) all of the above

The idea of course is to protect his rights before publish/distribution.

Your expertise is welcome.

thanks in advance.

[SciNote]

In the U.S., you can register original works using the U.S. copyright office website of Guets are not allowed to view links. In order to access the links, please Register or Login