ISWC · Musical Work

T-001909965-0

THEY DONT KNOW

Last verified: October 27, 2026

The ISWC for “THEY DONT KNOW” is T-001909965-0. 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

001909965Work 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.

SourcesCISACMLCMusicBrainz3 sources

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What is ISWC T-001909965-0?

T-001909965-0 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “THEY DONT KNOW”. 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-001909965-0

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What is ISWC T-001909965-0?

T-001909965-0

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What is ISWC T-001909965-0?