ISRC is a music-industry standard.
The ISRC identifies a specific musical recording, regardless of the format in which it is issued (unlike the ISBN). Thus the studio recording of Adele’s “Hello” has the same ISRC regardless of whether it’s issued on vinyl, MP3 or CD.
ISRC is in use at some of the biggest distributors of music worldwide – Apple, Spotify, and Pandora all use ISRCs to identify music. While it was developed in the 1980s originally, it has proven to be quite useful over time.