ISWC · Musical Work

T-700051385-1

Open Letter to Duke

8 recordings

Last verified: September 15, 2026

The ISWC for “Open Letter to Duke” is T-700051385-1. 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 8 known recordings (ISRCs) indexed on Credits.fm.

Format

TPrefix

700051385Work number

1Check 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

ISRC8 recordings

ISWCOpen Letter to Duke

Previously known as

T-042098435-5

What other identifiers does this connect to?

Songwriters/Publishers (IPI)

00020918504 00020918602

Creative Contributors (ISNI)

0000 0001 1083 2626

SourcesMusicBrainzCISACMusicBrainzNotes Credits4 sources

Verified on

CISAC ISWC registry search

Identifier Graph

What is ISWC T-700051385-1?

T-700051385-1 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “Open Letter to Duke”. 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 8 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-700051385-1

Open Letter to Duke

8 recordings

Last verified: September 15, 2026

Format

TPrefix

700051385Work number

1Check 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

ISRC8 recordings

ISWCOpen Letter to Duke

Previously known as

T-042098435-5

What other identifiers does this connect to?

Songwriters/Publishers (IPI)

00020918504 00020918602

Creative Contributors (ISNI)

0000 0001 1083 2626

Which releases contain this work? (28)

Weird Nightmare: Meditations on Mingus

Hal Willner

0746452739211992-01-01

Mingus Ah Um

Charles Mingus

0746440648271987-01-01

Mingus Ah Um

Charles Mingus

0746465512261999-01-01

The Complete 1959 Columbia Recordings

Charles Mingus

0746465145281998-01-01

Mingus Ah Um

Charles Mingus

0746465512641999-01-01

Mingus Ah Um

Charles Mingus

49880099201911997-01-01

Weird Nightmare: Meditations on Mingus

Hal Willner

49880095996251992-01-01

The Collection

Charles Mingus

50176159382271993-01-01

Mingus Ah Um

Charles Mingus

50601434933622010-01-01

Weird Nightmare: Meditations on Mingus

Hal Willner

50997472467221992-01-01

Mingus Ah Um

Charles Mingus

50997065512252006-01-01

Mingus Ah Um

Charles Mingus

5099745043620

The Complete 1959 Columbia Recordings

Charles Mingus

50997065145271998-01-01

Mingus Ah Um

Charles Mingus

8217972010252020-01-01

Mingus Ah Um

Charles Mingus

8217972208662019-01-01

Mingus Ah Um

Charles Mingus

84360286916162010-01-01

Mingus Ah Um

Charles Mingus

84365691951472021-01-01

Mingus Ah Um

Charles Mingus

8849771016382009-01-01

Live At Jazz Standard

Mingus Big Band

8845013165452010-01-01

Columbia Jazz Profiles: Charles Mingus

Charles Mingus

8869713372282007-01-01

Mingus Ah Um

Charles Mingus

8869195455172012-01-01

Mingus Ah Um

Charles Mingus

8869712757282007-01-01

Mingus Ah Um

Charles Mingus

8869748010232009-01-01

The Complete Columbia & RCA Albums Collection

Charles Mingus

8869797959212012-01-01

Mingus Ah Um

Charles Mingus

8869733568142008-01-01

Mingus Ah Um

Charles Mingus

8869766487182015-01-01

Original Album Classics

Charles Mingus

8869773605272010-01-01

Mingus Ah Um

Charles Mingus

8893973300332025-01-01

Recordings (8)

Open Letter to Duke

Denis Gäbel, Norbert Scholly

DEE282275005

On release:The Mingus Sessions(4260054557509)

Open Letter to Duke

Charles Mingus

USSM15900731

On release:The Complete 1959 Columbia Recordings(074646514528)Mingus Ah Um(074646551226)Mingus Ah Um(074646551264)Mingus Ah Um(5060143493362)The Complete 1959 Columbia Recordings(5099706514527)Mingus Ah Um(5099706551225)Mingus Ah Um(821797220866)Mingus Ah Um(8436028691616)Mingus Ah Um(8436569195147)Mingus Ah Um(884977101638)Mingus Ah Um(886971275728)Mingus Ah Um(886974801023)Original Album Classics(886977360527)The Perfect Jazz Collection II(886978765826)The Complete Columbia & RCA Albums Collection(886979795921)

Unknown Artist

Unknown Artist

Unknown Artist

Unknown Artist

Unknown Artist

OPEN LETTER TO THE DUKE

Unknown Artist

CB2CY0931198

Who are the artists on this work?

Charles Mingus

MLC Song Code

O70046

Verify on MLC Portal →

SourcesMusicBrainzCISACMusicBrainzNotes Credits4 sources

Verified on

CISAC ISWC registry search

Identifier Graph

T-700051385-1

Format

Previously known as

What other identifiers does this connect to?

Verified on

People also ask

What is ISWC T-700051385-1?

T-700051385-1

Format

Previously known as

What other identifiers does this connect to?

Which releases contain this work? (28)

Recordings (8)

Who are the artists on this work?

Verified on

People also ask

What is ISWC T-700051385-1?

Which releases contain this work? (28)

Recordings (8)

Who are the artists on this work?