ISWC · Musical Work

T-700059849-4

SAD LETTER

5 recordings

Last verified: July 20, 2026

The ISWC for “SAD LETTER” is T-700059849-4. 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

700059849Work 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

ISRC5 recordings

ISWCSAD LETTER

What other identifiers does this connect to?

Songwriters/Publishers (IPI)

00021507427 00021706224

Creative Contributors (ISNI)

0000 0000 7975 3064 0000 0003 6848 0998

SourcesMusicBrainzCISACMusicBrainzNotes Credits4 sources

Verified on

CISAC ISWC registry search

Identifier Graph

What is ISWC T-700059849-4?

T-700059849-4 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “SAD LETTER”. 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.

Learn more about ISWCs · Powered by Notes.fm

ISWC · Musical Work

T-700059849-4

SAD LETTER

5 recordings

Last verified: July 20, 2026

Format

TPrefix

700059849Work 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

ISRC5 recordings

ISWCSAD LETTER

What other identifiers does this connect to?

Songwriters/Publishers (IPI)

00021507427 00021706224

Creative Contributors (ISNI)

0000 0000 7975 3064 0000 0003 6848 0998

Which releases contain this work? (26)

The Real Folk Blues / More Real Folk Blues

Muddy Waters

0088112822262002-01-01

Down South Blues

Muddy Waters

0277261123291992-01-01

They Call Me Muddy Waters

Muddy Waters

0823331231201990-01-01

Rollin' & Tumblin'

Muddy Waters

0823331116221990-01-01

Muddy Waters on CHESS vol. 1 "1948-1951"

Muddy Waters

30726660005231984-01-01

The Blues: Rolling Stone: 1941-1950

Muddy Waters

34489609266212002-07-28

Blues & Rhythm Series: The Chronological Muddy Waters 1950-1952

Muddy Waters

33075105109282004-01-01

The Real Folk Blues / More Real Folk Blues

Muddy Waters

50172612043631999-01-01

All Aboard

Muddy Waters

50222210190172020-04-06

Blues Master Works

Muddy Waters

50249527300182013-01-01

The Chess Singles Collection & At Newport 1960

Muddy Waters

50364081706202014-01-01

The King of the Chicago Blues - The Essential Early Muddy Waters

Muddy Waters

50503613250402002-01-01

Got My Mojo Working - The Best of Muddy Waters

Muddy Waters

50603324910182013-01-01

Streamlined Woman

Muddy Waters

6432471177202001-01-01

Deep in the Blues

James Cotton

7314529849201996-01-01

King of Chicago Blues

Muddy Waters

8055200210292006-01-01

I Can’t Be Satisfied

Muddy Waters

8216036447562006-11-01

The Complete Aristocrat & Chess Singles A’s & B’s 1947-62

Muddy Waters

8240467072242014-01-01

Blues Legend

Muddy Waters

87121770396922000-01-01

Chicago Blues Legend

Muddy Waters

885150334751

Mississippi Mud

Muddy Waters

8843852219972008-11-28

1946/1954

Muddy Waters

97828490718472005-01-01

Rollin’ Stone: The Golden Anniversary Collection

Muddy Waters

0088112301282000-01-01

Rollin’ Stone: The Golden Anniversary Collection (The Complete Chess Masters Vol. 1: 1947 – 1952)

Muddy Waters

006025678479602018-09-07

The Complete Muddy Waters, 1947–1967

Muddy Waters

0823331597231992-01-01

The Essence of Muddy Waters

Muddy Waters

40064083332652007-01-01

Recordings (5)

Sad Letter

James Cotton

FRZ029502440

On release:Deep in the Blues(731452984920)

Sad Letter

Muddy Waters

USMC17202799

On release:Can’t Get No Grindin’(00076732931929)Charly Blues Masterworks, Volume 39: Funky Butt(0082333176829)Can’t Get No Grindin’ / "Unk" in Funk(4988067024893)Can't Get No Grindin'(829357400222)Can't Get No Grindin'(9315589643229)

Unknown Artist

Unknown Artist

Muddy Waters

On release:Rollin’ Stone: The Golden Anniversary Collection (The Complete Chess Masters Vol. 1: 1947 – 1952)(00602567847960)Rollin’ Stone: The Golden Anniversary Collection(008811230128)

Who are the artists on this work?

James Cotton Muddy Waters

MLC Song Code

S00480

Verify on MLC Portal →

SourcesMusicBrainzCISACMusicBrainzNotes Credits4 sources

Verified on

CISAC ISWC registry search

Identifier Graph

T-700059849-4

Format

What other identifiers does this connect to?

Verified on

People also ask

What is ISWC T-700059849-4?

T-700059849-4

Format

What other identifiers does this connect to?

Which releases contain this work? (26)

Recordings (5)

Who are the artists on this work?

Verified on

People also ask

What is ISWC T-700059849-4?

Which releases contain this work? (26)

Recordings (5)

Who are the artists on this work?