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  3. USBWK2100087
Difficult album cover

ISRC

USBWK2100087

Difficult✓2

Song: DIFFICULT

Aesop RockBlockhead
matched
Released 2021-11-12

Last verified: July 6, 2026

USBWK2100087 is the International Standard Recording Code (ISRC) for the recording “Difficult” by Aesop Rock, Blockhead, released 2021-11-12. 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 T3155035959. Written by IAN BAVITZ, JAMES A SIMON.

Format

USCountry
BWKRegistrant
21Year (2021)
00087Designation
Country:
ISO 3166-1 alpha-2 country code (US).
Registrant:
3-character code identifying the label or distributor that assigned this ISRC.
Year (2021):
Last two digits of the reference year (2021). Years < 50 are 21st century.
Designation:
Unique 5-digit code assigned by the registrant for this specific recording.

Credit Chain

ISRCDifficult
ISWCDIFFICULT
IPIIAN BAVITZ

Musical Work (ISWC)

T3155035959DIFFICULT

People also ask

What is the ISRC for "Difficult" by Aesop Rock?+
The ISRC for "Difficult" by Aesop Rock, Blockhead is USBWK2100087.
Who wrote "Difficult"?+
"Difficult" was written by IAN BAVITZ, JAMES A SIMON. The ISWC for this composition is T3155035959.
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. USBWK2100087 is the ISRC for this recording; T3155035959 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 USBWK2100087?

USBWK2100087 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “Difficult” by Aesop Rock, Blockhead. 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 T3155035959, 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?

IAN BAVITZComposerLyricist
IPI: 00430252208
TONESLAP MUSIC OriginalPublisherIPI: 00430752872
21 BAZOOKA SALUTE OriginalPublisherIPI: 00430774858
JAMES A SIMONComposerLyricist
IPI: 00430223021
TONESLAP MUSIC OriginalPublisherIPI: 00430752872

Who publishes this song?

TONESLAP MUSICOriginalPublisher
IPI: 00430752872
21 BAZOOKA SALUTEOriginalPublisher
IPI: 00430774858

Which contributors are credited?

0000 0004 4715 5392IAN BAVITZ

Identifier Graph

ISRCUSBWK2100087ISWCT3155035959IPIIAN BAVITZIPIJAMES A SIMONISNIIAN BAVITZ

MLC Song Code

DA58EU
Verify on MLC Portal →
SourcesMusicBrainzMLC✓2 sources

Verified on

  • MusicBrainz recording record
  • MLC song record
Aesop RockBlockhead

USBWK2100087 is the International Standard Recording Code (ISRC) for the recording “Difficult” by Aesop Rock, Blockhead, released 2021-11-12. 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 T3155035959. Written by IAN BAVITZ, JAMES A SIMON.

Aesop Rock, Blockhead

Related

Other versions of this workView all on iswc.fm

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IAN BAVITZIPIJAMES A SIMONIPI