ISRC
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One ISRC for “Keep Those Cards and Letters Coming In” by Ernest Tubb is USMC16515614. 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 1965-01-01. The underlying musical work is ISWC T-700.034.115-3.
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USMC16515614 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “Keep Those Cards and Letters Coming In” by Ernest Tubb, The Texas Troubadours, Loretta Lynn. 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-700.034.115-3, 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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One ISRC for “Keep Those Cards and Letters Coming In” by Ernest Tubb is USMC16515614. 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 1965-01-01. The underlying musical work is ISWC T-700.034.115-3.
