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  1. Home
  2. ISWCs
  3. T-900971218-9

ISWC · Musical Work

T-900971218-9

Cat’s Squirrel

4 recordings

Last verified: February 15, 2026

T-900971218-9 is the International Standard Musical Work Code (ISWC) for the musical composition "Cat’s Squirrel". 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 4 known recordings (ISRCs) indexed on Credits.fm.

Format

TPrefix
900971218Work 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

ISRC4 recordings
ISWCCat’s Squirrel
SourcesMusicBrainz

Verified on

  • CISAC ISWC registry search

Identifier Graph

ISWCCat’s SquirrelISRCGBAYK0800008ISRCGBAYK0800020ISRCGBAYK6800013ISRCGBCAD0800113

People also ask

What is ISWC T-900971218-9?+
ISWC T-900971218-9 identifies the musical composition "Cat’s Squirrel". ISWCs are defined by ISO 15707 and managed by CISAC to uniquely identify the underlying song — the melody, lyrics, and arrangement.
How many recordings use ISWC T-900971218-9?+
ISWC T-900971218-9 has 4 recordings (ISRCs) associated with it. Each recording is a distinct version — such as the original, a remix, a live performance, or a cover — that shares the same underlying composition.
How is an ISWC different from an ISRC?+
An ISWC identifies a musical work (the underlying composition — melody, lyrics, arrangement). An ISRC identifies a specific sound recording of that work. One ISWC can have many ISRCs — for example, the original recording, a remix, a live version, and a cover would each have their own ISRC but share the same ISWC.

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What is ISWC T-900971218-9?

T-900971218-9 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition "Cat’s Squirrel". 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 4 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.

Learn more about ISWCs · Powered by Notes.fm

Which releases contain this work? (1)

This Was

Jethro Tull

0946321041201990-01-01

Recordings (4)

1
Cat’s Squirrel

Jethro Tull

GBAYK6800013
On release:This Was: The 50th Anniversary Edition(0190295611484)This Was(044114104124)This Was(094632104120)This Was(4007192526567)This Was(4988006684676)This Was(4988006796782)This Was(5013136104127)This Was(501313610417)This Was(724349946811)This Was(724353545925)This Was(724353545956)The Triple Album Collection(825646184071)
2
Cat’s Squirrel (BBC sessions)

Jethro Tull

GBCAD0800113
On release:This Was: The 50th Anniversary Edition(0190295611484)This Was(5099920649722)John Peel Top Gear Session: 23rd July 1968(5099926601052)This Was(5099945686658)
3
Cat’s Squirrel (mono)

Jethro Tull

GBAYK0800008
On release:This Was: The 50th Anniversary Edition(0190295611484)This Was(5099920649722)This Was(5099945686658)
4
Cat’s Squirrel (new stereo mix)

Jethro Tull

GBAYK0800020
On release:This Was(5099920649722)This Was(5099945686658)

Who are the artists on this work?

Jethro Tull

MLC Song Code

C2125R
Verify on MLC Portal →