ISRC
Relentless
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The ISRC for “Relentless” by Cirith Ungol is USMBR2315797. 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 2023-10-20.
USMBR2315797 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “Relentless” by Cirith Ungol. 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 “Relentless” by Cirith Ungol is USMBR2315797. 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 2023-10-20.
