How can I verify Apple Music promotions are legit?

So i recently came across a thread and instagram reel with someone promoting a link that “supposedly” offers free apple music for 3 months and acording to his comments it’s only avaible in the US and all you gotta do is cancel your active subscription and just click the link and get it. The link contains “redeem.services.apple” and this is where it came suspicious to me. I don’t think it’s a safe link and we need a fix for people not to fall for it. The video has lots of views and the creator is verified and has 900k followers

[Re-Titled by Moderator]