Beats1 internet radio service is one of the main attractions of the new Apple Music. To accompany the launch, Apple has a Tumblr page applemusic.tumblr.com that is dedicated to Beats1. The new Tumblr site includes the schedule listing for the radio station.
In order to experience the new Apple Music and Beats1, you need to update to iOS 8.4 for the new Music app. On the Mac, upgrade to latest OS X Yosemite 10.10.4 and then iTunes to version 12.2. You also need to subscribe to Apple Music membership which has a free three-month trial.
Even though the slogan for Beats1 is “Worldwide. Always On. 24/7.”, you might want to confirm if the radio station is available in your country if you’re outside US. Apple has no official listing of the countries where Beats1 is available.