VERIFICATION PROCESS FOR BITCOIN ATMS, WTF?

[Eggsandbaconforbrekkie]

I was pondering using a bitcoin atm to get some coins, but every atm near me has some kind of identity verification process.   At the very least, you have to enter your phone number, get texted a code, then enter the code… then you can use the atm to buy bitcoins with cash (online sms burner numbers don’t work).
The ATM (and it’s owner) now has your phone number along with the other transaction details.
Assuming the btc you just got is now associated with your phn num, my question is, how can that association be found out?  Is it stored in the blockchain? Is it somehow public?  Or is it in the atm’s private company records?  Will your phn number still be tied to those bitcoins after they leave your possession?  okokokok… i guess what im asking is this:   If you get the coins with SMS verification, do you still have to tumble them to be anonymous?
Thanks for making this website.  I’m reading and learning as much as I can,  but some stuff I just don’t understand

[1714778436]

1714778436

[chnchapters]

My buddy is working for a BTC ATM company right now. He is working on building the machines. I have only used one once or twice, when they were newer and more in the prototype stage (years ago). I will ask him about this.