According to Oliver Schusser, Apple’s vice president of Apple Music:
Apple and Shazam have a long history together. Shazam was one of the first apps available when we launched the App Store and has become a favorite app for music fans everywhere
With a shared love of music and innovation, we are thrilled to bring our teams together to provide users even more great ways to discover, experience and enjoy music.
Shazam integration is available in Siri for iPhone, iPad, Apple Watch and Mac. To date, the app has been downloaded over 1 billion times around the world with 20 million songs identified per day.