Is the service you are using allow you to download the music DRM free, or is it only streamable?
If it’s the latter, might want to reconsider. Just like movies purchased on these platforms (Apple, Amazon, Microsoft, …), the license holder of the intellectual property (IP), usually the record/music company, can pull their content from these platforms at any time and you will not be reimbursed.
.io, .org, and .app are pretty good.
.xyz for fun ideas.
.dev for the obvious
.corp if you are an incorporated company in the US.