ISWC · Musical Work

T-921484878-9

I DON'T KNOW WHY

5 recordings

Last verified: September 4, 2026

The ISWC for “I DON'T KNOW WHY” is T-921484878-9. 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 5 known recordings (ISRCs) indexed on Credits.fm.

Format

TPrefix

921484878Work number

9Check 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

ISRC5 recordings

ISWCI DON'T KNOW WHY

What other identifiers does this connect to?

Songwriters/Publishers (IPI)

00600828474 00483186433 00595230341 00714077654 00595231632 00436938130 00403302716 00286582325 00685008044

Creative Contributors (ISNI)

0000 0000 8388 4462

SourcesCISACMusicBrainzNotes Credits3 sources

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CISAC ISWC registry search

Identifier Graph

What is ISWC T-921484878-9?

T-921484878-9 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “I DON'T KNOW WHY”. 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 5 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-921484878-9

Format

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What is ISWC T-921484878-9?

T-921484878-9

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What other identifiers does this connect to?

Which releases contain this work? (12)

Recordings (5)

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People also ask

What is ISWC T-921484878-9?

Which releases contain this work? (12)

Recordings (5)