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  1. Home
  2. ISRCs
  3. DEF054502064
Porgy and Bess, opera: Act II, Scene II. "It Ain't Necessarily So" album cover

ISRC

DEF054502064

Porgy and Bess, opera: Act II, Scene II. "It Ain't Necessarily So"✓2

Song: Porgy and Bess: It Ain’t Necessarily So

Jascha HeifetzEmanuel Bay
matched
Released 2006-09-01

Last verified: July 16, 2026

DEF054502064 is the International Standard Recording Code (ISRC) for the recording “Porgy and Bess, opera: Act II, Scene II. "It Ain't Necessarily So"” by Jascha Heifetz, Emanuel Bay, released 2006-09-01. ISRCs are 12-character ISO 3901 identifiers that uniquely tag a specific sound recording — different masters, remixes, and live versions each receive a distinct ISRC. The underlying musical work is ISWC T-900757862-3.

Format

DECountry
F05Registrant
45Year (2045)
02064Designation
Country:
ISO 3166-1 alpha-2 country code (DE).
Registrant:
3-character code identifying the label or distributor that assigned this ISRC.
Year (2045):
Last two digits of the reference year (2045). Years < 50 are 21st century.
Designation:
Unique 5-digit code assigned by the registrant for this specific recording.

Credit Chain

ISRCPorgy and Bess, opera: Act II, Scene II. "It Ain't Necessarily So"
ISWCPorgy and Bess: It Ain’t Necessarily So

Musical Work (ISWC)

T-900757862-3Porgy and Bess: It Ain’t Necessarily So

People also ask

What is the ISRC for "Porgy and Bess, opera: Act II, Scene II. "It Ain't Necessarily So"" by Jascha Heifetz?+
The ISRC for "Porgy and Bess, opera: Act II, Scene II. "It Ain't Necessarily So"" by Jascha Heifetz, Emanuel Bay is DEF054502064.
What is an ISRC and what does it tell you?+
An ISRC (International Standard Recording Code) is a 12-character ISO 3901 identifier that uniquely tags a specific sound recording. The first two characters are the country code, the next three are the registrant (label or distributor), the next two are the year, and the last five are a unique recording number.
Is the ISRC the same as the ISWC?+
No. The ISRC identifies a specific recording, while the ISWC identifies the underlying musical composition. DEF054502064 is the ISRC for this recording; T-900757862-3 is the ISWC for the composition it is a recording of. One composition (ISWC) can have many recordings (ISRCs) — originals, remixes, live versions, and covers each get their own ISRC but share the same ISWC.

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What is ISRC DEF054502064?

DEF054502064 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “Porgy and Bess, opera: Act II, Scene II. "It Ain't Necessarily So"” by Jascha Heifetz, Emanuel Bay. ISRCs are 12-character alphanumeric codes defined by ISO 3901, used globally by streaming platforms, record labels, and rights organizations to track plays and distribute royalties.

This recording is linked to the musical work T-900757862-3, which represents the underlying composition. Multiple recordings can share the same musical work — for example, an original version, a remix, and a cover would each have their own ISRC but reference the same ISWC.

Learn more about ISRCs · Powered by Notes.fm

Who wrote this song?

GEORGE GERSHWINComposerLyricist
IPI: 00011730139
FRANKIE G SONGS OriginalPublisherIPI: 00736966593
DOWNTOWN DLJ SONGS LLC RightsAdministratorIPI: 00647171538
IRA GERSHWINComposerLyricist
IPI: 00011730335
IRA GERSHWIN MUSIC OriginalPublisherIPI: 00334307783
WARNER GEO MET RIC MUSIC RightsAdministratorIPI: 00820833651
DUBOSE EDWIN HEYWARDComposerLyricist
IPI: 00014064426
DU BOSE-DOROTHY HEYWARD MEMORIAL FUND PUBL OriginalPublisherIPI: 00334532678
DOWNTOWN DLJ SONGS LLC RightsAdministratorIPI: 00647171538
DOROTHY HEYWARDComposerLyricist
IPI: 00822709932
DU BOSE-DOROTHY HEYWARD MEMORIAL FUND PUBL OriginalPublisherIPI: 00334532678
DOWNTOWN DLJ SONGS LLC RightsAdministratorIPI: 00647171538

Who publishes this song?

FRANKIE G SONGSOriginalPublisher
IPI: 00736966593
DOWNTOWN DLJ SONGS LLCRightsAdministrator
IPI: 00647171538
IRA GERSHWIN MUSICOriginalPublisher
IPI: 00334307783
WARNER GEO MET RIC MUSICRightsAdministrator
IPI: 00820833651
DU BOSE-DOROTHY HEYWARD MEMORIAL FUND PUBLOriginalPublisher
IPI: 00334532678

Which contributors are credited?

0000 0001 2135 5968GEORGE GERSHWIN0000 0001 0890 1469IRA GERSHWIN0000 0001 0886 3028DUBOSE EDWIN HEYWARD

Identifier Graph

ISRCDEF054502064ISWCT-900757862-3IPIGEORGE GERSHWINIPIIRA GERSHWINIPIDUBOSE EDWIN HE…IPIDOROTHY HEYWARDISNIGEORGE GERSHWINISNIIRA GERSHWINISNIDUBOSE EDWIN HE…

MLC Song Code

PVAP18
Verify on MLC Portal →
SourcesMusicBrainzMLCMLC✓3 sources

Verified on

  • MusicBrainz recording record
  • MLC song record
Listen on Apple Music
Album: Jascha Heifetz - It Ain't Necessarily So (Legendary Classic And Jazz Studio Takes)2:32Track 18

Who performed on this recording?

Performers

Jascha Heifetzviolin
Emanuel Baypiano

Label

Deutsche Grammophon

Appears on

  • 111: The Violin: Legendary Recordings(2016-01-01)
  • 111 Years of Deutsche Grammophon(2009-01-01)
  • It Ain’t Necessarily So: Legendary Classic and Jazz Studio Takes(2006-01-01)
  • 111 Years of Deutsche Grammophon(2009-01-01)

Related

Other versions of this workView all on iswc.fm

It Ain't Necessarily So

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Porgy and Bess: It ain't Necessarily So (Arr. for Violin & Piano) (Remastered)

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USSM11404977
Porgy and Bess: It Ain’t Necessarily So

Jascha Heifetz, Brooks Smith

USBC16500229
Porgy and Bess: It Ain’t Necessarily So

Anne-Sophie Mutter, André Previn

DEN960200452
4. IT AIN'T NECESSARILY SO (ACT II)GBBBC2100146

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Jascha HeifetzEmanuel Bay

DEF054502064 is the International Standard Recording Code (ISRC) for the recording “Porgy and Bess, opera: Act II, Scene II. "It Ain't Necessarily So"” by Jascha Heifetz, Emanuel Bay, released 2006-09-01. ISRCs are 12-character ISO 3901 identifiers that uniquely tag a specific sound recording — different masters, remixes, and live versions each receive a distinct ISRC. The underlying musical work is ISWC T-900757862-3.

Jascha Heifetz, Emanuel Bay

MLC Registration

Multiple registrations · 2

Multiple works are registered to this ISRC (covers, remixes, or alternate versions).

T9007578623

Writers: , , ,

Writers: ,

Checked: Sep 10, 2026