ISRC
I Knew You Were Trouble.
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The ISRC for “I Knew You Were Trouble.” by Taylor Swift is USUG12510678. 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. The underlying musical work is ISWC T-909.045.446-9. Written by TAYLOR ALISON SWIFT, JOHAN KARL SCHUSTER, MARTIN MAX SANDBERG.
Credit Chain
USUG12510678 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “I Knew You Were Trouble.” by 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-909.045.446-9, 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 “I Knew You Were Trouble.” by Taylor Swift is USUG12510678. 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. The underlying musical work is ISWC T-909.045.446-9. Written by TAYLOR ALISON SWIFT, JOHAN KARL SCHUSTER, MARTIN MAX SANDBERG.
