ISWC · Musical Work

T-042876397-6

WILLIE S DARK TIMES BLUES

Last verified: February 15, 2026

The ISWC for “WILLIE S DARK TIMES BLUES” is T-042876397-6. ISWCs are ISO 15707 identifiers managed by CISAC; they identify the underlying song — its melody, lyrics, and arrangement — rather than any single recording. One composition can have many recordings (ISRCs).

Format

TPrefix

042876397Work number

6Check digit

Prefix:: "T" = musical work; "W" = work in progress.
Work number:: 9-digit unique work number assigned by CISAC.
Check digit:: ISO 7064 Mod 11-2 check digit that validates the rest of the code.

SourcesCISACMLC2 sources

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What is ISWC T-042876397-6?

T-042876397-6 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “WILLIE S DARK TIMES BLUES”. ISWCs are defined by ISO 15707 and managed by CISAC. Unlike ISRCs which identify recordings, an ISWC identifies the underlying song — the melody, lyrics, and arrangement.

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T-042876397-6

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What is ISWC T-042876397-6?

T-042876397-6

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What is ISWC T-042876397-6?