ISWC · Musical Work

T-900938029-4

Back in the Day

65 recordings

Last verified: June 8, 2026

T-900938029-4 is the International Standard Musical Work Code (ISWC) for the musical composition "Back in the Day". 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). This work has 65 known recordings (ISRCs) indexed on Credits.fm.

Format

TPrefix

900938029Work number

4Check 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.

Credit Chain

ISRC65 recordings

ISWCBack in the Day

SourcesCISACMusicBrainz2 sources

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What is ISWC T-900938029-4?

T-900938029-4 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition "Back in the Day". 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.

This work has 65 recordings (ISRCs) associated with it. Each recording represents a distinct version — such as the original, a remix, a live performance, or a cover — that shares the same underlying composition.

T-900938029-4

Format

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What is ISWC T-900938029-4?

T-900938029-4

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Recordings (65)

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People also ask

What is ISWC T-900938029-4?

Recordings (65)