ISWC · Musical Work

T-305734828-0

IMPROVISATION ON O MASTER LET ME WA

Last verified: February 15, 2026

The ISWC for “IMPROVISATION ON O MASTER LET ME WA” is T-305734828-0. 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

305734828Work number

0Check 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-305734828-0?

T-305734828-0 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “IMPROVISATION ON O MASTER LET ME WA”. 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-305734828-0

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What is ISWC T-305734828-0?

T-305734828-0

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What is ISWC T-305734828-0?