Understanding ISRCs

An ISRC (International Standard Recording Code) is a unique identifier for each sound recording. Think of it like a fingerprint for your track—it follows that recording for life, no matter who owns it or where it’s released. For example, if you release the same recording as both a single and as part of an album, it keeps the same ISRC.

This article covers what ISRCs are, when you need new ones, and how to find the codes assigned to your music in your CD Baby account.

What is an ISRC?

• An ISRC is a permanent code assigned to a specific recording.
• It applies to the sound recording itself, not the underlying composition.
• Each version of a recording needs its own ISRC.

How long is an ISRC valid?

• Once assigned, an ISRC identifies that track for its entire life.
• It never changes, even if ownership of the recording changes.
• The same ISRC is used any time the original, unaltered track is reused (such as on a compilation or album re-release).

When do I need a new ISRC?

You’ll need a new code if the recording is changed in any meaningful way, such as:

• Remixes or edits.
• Any change to track length of more than 10 seconds.
• Using part of a previously released recording in a new compilation.
• "Full restoration” work like remastering, re-pitching, or noise reduction.
• Rebranding (changing metadata tied to the track). (Not recommended.)
• For a full list of cases, see the ISRC handbook.

What about ISWC codes?

• ISWC = International Standard Musical Work Code.
• ISWCs identify the composition (songwriting), not the recording.
• They are assigned by your performing rights organization (like ASCAP or BMI in the U.S.).
• CD Baby doesn’t assign ISWCs.
• You can usually find ISWCs in your PRO’s public repertoire database.

Things to note

• For more technical details, check out the official ISRC site.