'Changing everything' -
Meanwhile, TikTok has continued to create viral sensations that are reshaping the musical landscape.
Sometimes, it's old songs given a new lease of life, such as recent crazes for Fleetwood Mac's "Dreams" or Boney M's "Rasputin".
But often it's new or independent artists, who no longer need the backing of record labels to find a massive audience.
"It's hard to overstate how much this is changing everything," said Tom Rosenthal, a London-based musician whose songs have been used on 1.6 million TikTok videos.
"Major labels are kinda crapping their pants because the traditional systems of marketing no longer apply. (TikTok) is a great leveller. You can do it on your own," he said.
Some artists are becoming huge without even knowing about the app.
That was the case with Nigerian popstar CKay. His 2019 single "Love Nwantiti" was a decent-sized hit in his home country, but then TikTok users got hold of it, and by November 2021 it had surpassed 15 billion streams and topped charts from Asia to Europe to North America.
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'On to something'
TikTok is already thinking about next steps.
Its latest service, SoundOn, offers unsigned artists a simpler way to upload songs, get paid and find distribution.
Obermann hints this could see TikTok become more like a record label.
"We think we're on to something," he said, highlighting recent viral hits by unsigned acts Muni Lang and Games We Play.
"It's early days in deciding exactly how we work with these artists on building their careers. But we see we can play a much bigger role in the artist discovery process in a very hands-on way."
Pent-up demand
Obermann also hopes to revolutionize the way that songs are used for adverts -- a part of the business that is currently worth around $500 million globally per year but could be worth much more.
"Traditionally, it meant something like a big car brand licencing Celine Dion's 'I Drove All Night' for their TV ads," he said.
"But we have about one million small and medium businesses who want to make TikTok ads using music. And it's an absolute nightmare because our licenses don't include commercial usage."
Currently, each commercial use requires TikTok to get special permission from the label and all the songwriters, which can take months.
"It's extremely inefficient. If we can redesign the way that works, (the global licensing business) would go from $500 million to several billion within a few years. There's that much pent-up demand. We're really working on that."
Other ideas include live-streaming concerts and direct sales, with some artists already flogging vinyls and merch through the platform.
But will TikTok disappear as quickly as it arrived? The ghost of MySpace, a previous revolutionary force in music, haunts its successors.
"That's something we think about every day when we wake up," said Obermann.
"We're confident TikTok has tipped into the cultural zeitgeist to a tremendous extent at this point. But it's always day one and you have to keep reinventing yourself to stay relevant."
