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  3. USUM71900686
What a Time album cover

ISRC

USUM71900686

What a Time✓2

Song: I DIDN'T KNOW WHAT TIME IT WAS

Julia MichaelsNiall Horan
matched
Released 2019-01-24

Last verified: July 16, 2026

USUM71900686 is the International Standard Recording Code (ISRC) for the recording “What a Time” by Julia Michaels, Niall Horan, released 2019-01-24. 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-927448850-5. Written by JULIA CARIN CAVAZOS, JUSTIN DREW TRANTER, CASEY DANIEL BARTH, and others.

Format

USCountry
UM7Registrant
19Year (2019)
00686Designation
Country:
ISO 3166-1 alpha-2 country code (US).
Registrant:
3-character code identifying the label or distributor that assigned this ISRC.
Year (2019):
Last two digits of the reference year (2019). Years < 50 are 21st century.
Designation:
Unique 5-digit code assigned by the registrant for this specific recording.

Credit Chain

ISRCWhat a Time
ISWCI DIDN'T KNOW WHAT TIME IT WAS
IPIJULIA CARIN CAVAZOS

Musical Work (ISWC)

T-927448850-5I DIDN'T KNOW WHAT TIME IT WAS

People also ask

What is the ISRC for "What a Time" by Julia Michaels?+
The ISRC for "What a Time" by Julia Michaels, Niall Horan is USUM71900686.
Who wrote "What a Time"?+
"What a Time" was written by JULIA CARIN CAVAZOS, JUSTIN DREW TRANTER, CASEY DANIEL BARTH, RILEY KNAPP. The ISWC for this composition is T-927448850-5.
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. USUM71900686 is the ISRC for this recording; T-927448850-5 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 USUM71900686?

USUM71900686 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “What a Time” by Julia Michaels, Niall Horan. 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-927448850-5, 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?

JULIA CARIN CAVAZOSComposerLyricist
IPI: 00608882812
JUSTIN DREW TRANTERComposerLyricist
IPI: 00403302716
CASEY DANIEL BARTHComposerLyricist
IPI: 00611401507
RILEY KNAPPComposerLyricist

Which contributors are credited?

0000 0000 8388 4462JUSTIN DREW TRANTER0000 0004 6461 0174JULIA CARIN CAVAZOS

Identifier Graph

ISRCUSUM71900686ISWCT-927448850-5IPIJULIA CARIN CAV…IPIJUSTIN DREW TRA…IPICASEY DANIEL BA…ISNIJUSTIN DREW TRA…ISNIJULIA CARIN CAV…

MLC Song Code

WA99MH
Verify on MLC Portal →
SourcesNotesMusicBrainzMLC via Notes✓3 sources

Verified on

  • MusicBrainz recording record
  • MLC song record
Julia MichaelsNiall Horan

USUM71900686 is the International Standard Recording Code (ISRC) for the recording “What a Time” by Julia Michaels, Niall Horan, released 2019-01-24. 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-927448850-5. Written by JULIA CARIN CAVAZOS, JUSTIN DREW TRANTER, CASEY DANIEL BARTH, and others.

Julia Michaels, Niall Horan

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