Burn your song on a CD. Include on the CD the name of your song, the date the song was written, the names of the songwriters and the recording date.
Write your lyrics down on a piece of paper.
Mail a copy of the CD and lyrics to yourself via Canada Post registered mail.
File your package away when you receive it. Make sure the package is not opened; this guarantees the legitimacy of the contents.
Register your song with a performing rights and mechanical society such as the Society of Composers, Authors and Music Publishers of Canada or the Canadian Musical Reproduction Rights Agency Ltd. Although you will have to pay a membership fee, these organizations ensure that your song is properly copyrighted and that you are paid royalties every time your song is played on the radio.