Notes.fmCredits.fm
ISRCISWCIPIISNIUPCMusiciansAPIMCP
SearchISRCCreditsWorksMore

Search

  • Credits.fm
  • isrc.fm
  • iswc.fm
  • ipi.fm
  • isni.fm
  • UPC Search
  • Musician Search
  • Credits Graph
  • Top IPIs
  • Top ISRCs
  • Top ISWCs
  • Top ISNIs
  • Top UPCs

Learn

  • What Are Music Credits?
  • What Is an ISRC?
  • What Is an ISWC?
  • What Is an IPI?
  • What Is an ISNI?
  • What Is a UPC?
  • ISRC vs ISWC
  • ISRC vs UPC
  • IPI vs ISNI
  • Glossary

Developers

  • REST API
  • Credits Graph
  • MCP Server
  • llms.txt

About

  • About Credits.fm
  • Notes.fm
  • Privacy Policy
  • Terms of Service
Notes.fm
Credits.fmCredits.fm
  1. Home
  2. ISRCs
  3. USBWK2100101
Difficult album cover

Difficult

ISRC

USBWK2100101

Song: DIFFICULT

Aesop RockBlockhead
matched
Released 2023-02-17

Last verified: October 21, 2026

One ISRC for “Difficult” by Aesop Rock is USBWK2100101. 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. Released 2023-02-17. The underlying musical work is ISWC T-315503595-9. Written by IAN BAVITZ, JAMES A SIMON.

Format

USCountry
BWK
Registrant
21Year (2021)
00101Designation
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)

T-315503595-9DIFFICULT

People also ask

What is one ISRC for “Difficult” by Aesop Rock?+
One ISRC for “Difficult” by Aesop Rock is USBWK2100101.
What is the ISWC for “DIFFICULT”?+
The ISWC for “DIFFICULT” is T-315503595-9. This recording is titled “Difficult”. The ISRC USBWK2100101 identifies this specific recording; the ISWC identifies the underlying musical work shared by all versions.
Who wrote “DIFFICULT”?+
“DIFFICULT” was written by IAN BAVITZ, JAMES A SIMON. The ISWC for this composition is T-315503595-9.
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. USBWK2100101 is the ISRC for this recording; T-315503595-9 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.

Collect royalties for this recording

Notes is distribution, publishing administration, and royalty collection in one account. Flat subscription. Notes does not take a percentage of royalties.

Collect royalties with Notes

What is ISRC USBWK2100101?

USBWK2100101 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 T-315503595-9, 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
JAMES A SIMONComposerLyricist
IPI: 00430223021

Which contributors are credited?

0000 0004 4715 5392IAN BAVITZ

Identifier Graph

ISRCUSBWK2100101ISWCT-315503595-9IPIIAN BAVITZIPIJAMES A SIMONISNIIAN BAVITZ

MLC Song Code

DA58EU
Verify on MLC Portal →
SourcesNotesMusicBrainz✓2 sources

Verified on

  • MusicBrainz recording record
  • MLC song record
Aesop RockBlockhead

One ISRC for “Difficult” by Aesop Rock is USBWK2100101. 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. Released 2023-02-17. The underlying musical work is ISWC T-315503595-9. Written by IAN BAVITZ, JAMES A SIMON.

Aesop Rock, Blockhead

Related

More by Aesop Rock

Late for the Sky

Evidence, Slug, Aesop Rock

USBWK1100102
Fumes

Aesop Rock

USA4T0414405
Saturn Missiles (instrumental)

Aesop Rock

USBWK1200084
Lotta Years (instrumental)

Aesop Rock

USBWK1500127
ALL THE SMARTEST PEOPLE

Aesop Rock, Blockhead

USBWK2100102
Big Bang

Aesop Rock

USA561091151

Songwriter profiles

IAN BAVITZIPIJAMES A SIMONIPI