Justin Bieber may be one of the top-selling musicians of all time, with a clutch of Grammy Awards and Junos to his name, but are his songs Canadian enough for the government's online streaming bill?

Spotify, the world's biggest streaming platform, where Bieber's hits have been listened to millions of times, has doubts.

It says songs by the 28-year-old Ontario-born singer-songwriter and other well-known Canadian artists may not be counted as officially Canadian under Bill C-11, which is now moving through Parliament.

Among the tracks Spotify says are unlikely to qualify under the strict Canadian content rules are Bieber's Ghost, Tate McRae's She's All I Wanna Be and Moroccan-Canadian singer Faouzia's Anybody Else.

The bill aims to update the Broadcasting Act to bring streaming platforms under the same rules as traditional broadcasters, including requiring them to promote Canadian content.

To qualify as Canadian, songs must tick a series of boxes.

According to the current rules, a song must meet two of the following criteria to be counted as Canadian: being written entirely by a Canadian; performed principally by a Canadian; be broadcast or performed live in Canada; or have lyrics written entirely by a Canadian.

Bieber's Ghost, for example, only meets one of those requirements — meaning traditional broadcasters already cannot count it as Canadian content, and if the bill passes, Spotify and other streaming platforms won't be able to either.

Spotify says without a more flexible definition of what qualifies as Canadian content, it could end up promoting fewer tracks by the nation's artists than it currently does on its Canadian playlists.

"It's important to understand that today's music world is international in nature, involving the collaboration of artists from across the globe," said Nathan Wiszniak, Spotify's head of Canadian artist and label marketing.

"Under current Canadian content definitions, many songs that we know and love from Canadian artists would not be classed as Canadian."

However, the current rules could change. Heritage Minister Pablo Rodriguez has said he plans to ask the broadcast regulator, the Canadian Radio-television and Telecommunications Commission, to review the definition of Canadian content.

He has said he will issue the policy direction to the CRTC after the bill passes through Parliament. At that point, the CRTC would be in charge of regulating streaming platforms and making sure they are promoting Canadian content that qualifies.

Spotify curates 90 playlists spotlighting Canadian artists across a range of genres including country, Quebec rap and francophone classics.

The platform says it currently uses a range of data sources to determine if a song is Canadian, including self-reporting by the artist.

"This means that we carry a much wider category of tracks that we have identified as Canadian compared to what we believe would be classed as Canadian under current definitions," Wiszniak said.

The playlists are tailored to a listener's musical tastes, partly based on what they tend to listen to. They are also designed to introduce people to Canadian musicians and genres they might not have heard before, he says.

"We are concerned that unless the Canadian content requirements are updated, this bill could limit the exposure of emerging and beloved Canadian artists and, in turn, cause the overexposure of others, pushing listeners away."

Michael Geist, the Canada Research Chair in internet law at the University of Ottawa, says the current criteria for what counts as a Canadian song can "lead to some odd quirks." He says the definition of Canadian content needs updating in the bill.

"[It] has led to foreign artists performing covers of Canadian songs produced outside Canada being defined as Canadian, because they meet the standards for music and lyrics," he says, "while Canadian artists performing songs written by non-Canadians and produced outside of Canada do not count as Canadian because only the artist requirement is met."

Bill C-11 has passed through the House of Commons and is being scrutinized in the Senate, where it will be discussed when senators return from their summer break.

Senators have been inundated with phone calls, emails and letters from opponents of the bill who claim it could impact amateur videos posted on YouTube.

But supporters of the bill say it updates Canada's broadcast laws and will help promote Canadian artists.