ISWC · Musical Work

T-305733233-5

SLUMBER SONG

Last verified: November 2, 2026

The ISWC for “SLUMBER SONG” is T-305733233-5. 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

305733233Work number

5Check 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.

Previously known as

T-305733235-7

SourcesCISACMLCMusicBrainz3 sources

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What is ISWC T-305733233-5?

T-305733233-5 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “SLUMBER SONG”. 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-305733233-5

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What is ISWC T-305733233-5?

T-305733233-5

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Previously known as

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What is ISWC T-305733233-5?