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  1. Home
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  3. USNLR2000546
CARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN) album cover

CARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN)

ISRC

USNLR2000546

Song: CARL SAGAN'S FIREFLY OPUS

matched

Last verified: September 9, 2026

The ISRC for this recording (“CARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN)”) is USNLR2000546. 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 T3018100982.

Format

USCountry
NLRRegistrant
20
Year (2020)
00546Designation
Country:
ISO 3166-1 alpha-2 country code (US).
Registrant:
3-character code identifying the label or distributor that assigned this ISRC.
Year (2020):
Last two digits of the reference year (2020). Years < 50 are 21st century.
Designation:
Unique 5-digit code assigned by the registrant for this specific recording.

Credit Chain

ISRCCARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN)
ISWCCARL SAGAN'S FIREFLY OPUS

Musical Work (ISWC)

T3018100982CARL SAGAN'S FIREFLY OPUS

People also ask

What is the ISRC for this recording of “CARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN)”?+
The ISRC for this recording (“CARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN)”) is USNLR2000546.
What is the ISWC for “CARL SAGAN'S FIREFLY OPUS”?+
The ISWC for “CARL SAGAN'S FIREFLY OPUS” is T3018100982. This recording is titled “CARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN)”. The ISRC USNLR2000546 identifies this specific recording; the ISWC identifies the underlying musical work shared by all versions.
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. USNLR2000546 is the ISRC for this recording; T3018100982 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 USNLR2000546?

USNLR2000546 is an International Standard Recording Code (ISRC) that uniquely identifies the recording “CARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN)”. 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 T3018100982, 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.

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Credits Graph

MLC Song Code

CB48E3
Verify on MLC Portal →
SourcesMLCMusicBrainz✓2 sources

Verified on

  • MusicBrainz recording record
  • MLC song record

The ISRC for this recording (“CARL SAGAN'S FIREFLY OPUS (FEAT. HEATHER CHRISTIAN)”) is USNLR2000546. 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 T3018100982.