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  1. Home
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  3. USBWK2100178
Defender (Blockhead remix) album cover

Defender (Blockhead remix)

ISRC

USBWK2100178

Song: DEFENDER

Aesop Rock
matched
Released 2022-01-28

Last verified: September 4, 2026

The ISRC for this recording (“Defender (Blockhead remix)”) is USBWK2100178. 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 2022-01-28. The underlying musical work is ISWC T-306315281-4. Written by JAMES A SIMON, IAN BAVITZ.

Format

USCountry
BWK
Aesop Rock

The ISRC for this recording (“Defender (Blockhead remix)”) is USBWK2100178. 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 2022-01-28. The underlying musical work is ISWC T-306315281-4. Written by JAMES A SIMON, IAN BAVITZ.

Registrant
21Year (2021)
00178Designation
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

ISRCDefender (Blockhead remix)
ISWCDEFENDER
IPIJAMES A SIMON

Musical Work (ISWC)

T-306315281-4DEFENDER

People also ask

What is the ISRC for this recording of “Defender (Blockhead remix)”?+
The ISRC for this recording (“Defender (Blockhead remix)”) is USBWK2100178.
What is the ISWC for “DEFENDER”?+
The ISWC for “DEFENDER” is T-306315281-4. This recording is titled “Defender (Blockhead remix)”. The ISRC USBWK2100178 identifies this specific recording; the ISWC identifies the underlying musical work shared by all versions.
Who wrote “DEFENDER”?+
“DEFENDER” was written by JAMES A SIMON, IAN BAVITZ. The ISWC for this composition is T-306315281-4.
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. USBWK2100178 is the ISRC for this recording; T-306315281-4 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 USBWK2100178?

USBWK2100178 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “Defender (Blockhead remix)” by Aesop Rock. 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-306315281-4, 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

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Songwriter profiles

JAMES A SIMONIPIIAN BAVITZIPI

Who wrote this song?

JAMES A SIMONComposerLyricist
IPI: 00430223021
IAN BAVITZComposerLyricist
IPI: 00430252208

Which contributors are credited?

0000 0004 4715 5392IAN BAVITZ

Identifier Graph

ISRCUSBWK2100178ISWCT-306315281-4IPIJAMES A SIMONIPIIAN BAVITZISNIIAN BAVITZ

MLC Song Code

DC71ZK
Verify on MLC Portal →
SourcesNotesMusicBrainz✓2 sources

Verified on

  • MusicBrainz recording record
  • MLC song record