Brett Kissel's mic died when he began to sing the national anthem at a 2017 Ducks/Oilers game in Edmonton. The local fans, however, pitched in and loudly finished the U.S. national anthem. It seems that Canadians have concluded that their burning of our White House in 1814 settled the score for our burning of their Government House and Parliament the year before.
If our neighbors to the north can sing our national anthem, it seems that we could at least correctly name their country. Here in California, the legislature can't seem to make up its mind whether the country is Canada or the Dominion of Canada. Sections 25100(b) and (i) of the Corporations Code, for example, refer simply to Canada while Sections 809 and 7250 refer to the Dominion of Canada. The Commissioner of Business Oversight's regulations use Canada. 10 CCR §§ 260.105.40 & 260.204.10. I could find no references to the Dominion of Canada in any California state agency regulation.
The Canadian government's website refers to the Government of Canada, but according to the Encyclopedia of Canada, the "Dominion of Canada remains the country's formal — if seldom used — national title".