Since age verification requirements took effect on Friday, people in the UK have been asked to confirm their age across a range of different platforms including social media platforms Reddit and X.
Spotify confirmed to the BBC on Wednesday that it may prompt people in the UK, among other locations including Australia, to confirm their age if accessing music videos rated 18+ by uploaders.
The sweeping rules have prompted a backlash from some who see the requirements as an overreach or potential privacy concern.
More than 400,000 people have now signed a petition calling for the repeal of the Online Safety Act – the law requiring age checks to stop children encountering adult content.
The government said in response it has no plans to withdraw the law.
Some have also criticised the effectiveness of Ofcom’s implementation of UK age check requirements, and their potential circumvention using virtual private networks.
Apps providing free VPNs – which allow people to disguise their location online, in order to access the web from a different location – topped free app download charts on Apple’s App Store after the rules came into effect on Friday.
Ofcom has defended the measures as no “silver bullet” but said they will help make the internet safer for children by reducing the chance of them “stumbling across porn”.