ISRC
Track 6
Song: THE OPTIMIST
Last verified:
The ISRC for “Track 6” by Hilary Duff is USAT22509262. 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 2026-02-20. Written by MATTHEW BAIR, HILARY DUFF, BRIAN PHILLIPS, and others.
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USAT22509262 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “Track 6” by Hilary Duff. 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.
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The ISRC for “Track 6” by Hilary Duff is USAT22509262. 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 2026-02-20. Written by MATTHEW BAIR, HILARY DUFF, BRIAN PHILLIPS, and others.
