What everyone suggests is cool. But, truth is, you can use Datacenter proxies. Whenever you try to sign up for a new Spotify account using a proxy, Spotify will inform you whether your proxy is good to use on their platform, or not. Because they either prevent your account from being created or sign up would be a success.
So, if your proxy provider offers replacement within the first 24hours, and let’s say you order 10 proxies and 5 were unsuccessful, just inform them of the proxies/subnets that were unsuccessful with Spotify, and use the replacements to see if those are successful/unsuccessful creating a Spotify account, and you’ll have your answer.
and every few weeks or so, you can take your successful proxies, and attempt to create a Spotify account with each one. If Spotify rejects a proxy that once was successful, you know what proxy you need to ditch.
I use AIOSTREAM & Streamtrigger so we’re in the same boat. Happy Farming.