ISRC
Half of My Heart
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The ISRC for “Half of My Heart” by John Mayer, Taylor Swift is USSM10905701. ISRCs are 12-character ISO 3901 identifiers that uniquely tag a specific sound recording — different masters, remixes, and live versions each receive a distinct ISRC. Released 2009-01-01. The underlying musical work is ISWC T-903600271-8. Written by JOHN CLAYTON MAYER.
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USSM10905701 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “Half of My Heart” by John Mayer, Taylor Swift. ISRCs are 12-character alphanumeric codes defined by ISO 3901, used globally by streaming platforms, record labels, and rights organizations to track plays and distribute royalties.
This recording is linked to the musical work T-903600271-8, which represents the underlying composition. Multiple recordings can share the same musical work — for example, an original version, a remix, and a cover would each have their own ISRC but reference the same ISWC.
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MLC Song Code
The ISRC for “Half of My Heart” by John Mayer, Taylor Swift is USSM10905701. ISRCs are 12-character ISO 3901 identifiers that uniquely tag a specific sound recording — different masters, remixes, and live versions each receive a distinct ISRC. Released 2009-01-01. The underlying musical work is ISWC T-903600271-8. Written by JOHN CLAYTON MAYER.
