You didn't have the right lyrics
Those are the original lyrics from june 24th, 1880, as written by Adolphe-Basile Routhier:
Ô Canada! Terre de nos aïeux,
Ton front est ceint de fleurons glorieux !
Car ton bras sait porter l'épée,
Il sait porter la croix !
Ton histoire est une épopée
Des plus brillants exploits.
Et ta valeur, de foi trempée,
Protégera nos foyers et nos droits.
Protégera nos foyers et nos droits.
This is only the first part, which is usually what is sang. And it's not Oh Canada, it's Ô Canada in French and O Canada in english.