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  3. GBCTX2100047
Book of Saturday album cover

ISRC

GBCTX2100047

Book of Saturday✓2

King Crimson
matched

Last verified: July 28, 2026

GBCTX2100047 is the International Standard Recording Code (ISRC) for the recording “Book of Saturday” by King Crimson. 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-800.370.657-9.

Format

GBCountry
CTXRegistrant
21Year (2021)
00047Designation
Country:
ISO 3166-1 alpha-2 country code (GB).
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

ISRCBook of Saturday
ISWCBook of Saturday

Musical Work (ISWC)

T-800.370.657-9Book of Saturday

Credits Graph

MLC Song Code

B63780
Verify on MLC Portal →
SourcesMusicBrainzMLC✓2 sources

Verified on

  • MusicBrainz recording record
  • MLC song record

People also ask

What is the ISRC for "Book of Saturday" by King Crimson?+
The ISRC for "Book of Saturday" by King Crimson is GBCTX2100047.
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. GBCTX2100047 is the ISRC for this recording; T-800.370.657-9 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.

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What is ISRC GBCTX2100047?

GBCTX2100047 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “Book of Saturday” by King Crimson. 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-800.370.657-9, 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

King Crimson

GBCTX2100047 is the International Standard Recording Code (ISRC) for the recording “Book of Saturday” by King Crimson. 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-800.370.657-9.

King Crimson

Related

Other versions of this workView all on iswc.fm

Book of Saturday (alt take)

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GBCTX1900081
Book of Saturday

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GBCTX1800768
Book of Saturday (commentary)

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GBCTX1900080
Book of Saturday

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GBCTX0000120
Book of Saturday

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GBCTX9900253

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