At the bottom of an album page, Spotify shows certain details including © and ℗. For example for Taylor Swift's album 1984 https://open.spotify.com/album/2QJmrSgbdM35R67eoGQo4j
© 2014 Big Machine Records, LLC.
℗ 2014 Big Machine Records, LLC.
What's the meaning of © and ℗? In the example above they are identical, but when might they differ?