Music Knowledge
What Is an ISWC Code?
ISWC explained: the international identifier for musical compositions, how it differs from ISRC, and why songwriters should register their works with it.
ISWC (International Standard Musical Work Code) is the global identifier for a musical composition — the song itself, its lyrics and melody — rather than a specific recording of it. It is assigned by CISAC through national collection societies.
ISWC vs ISRC
ISRC identifies a specific recording; ISWC identifies the underlying composition. One composition can have many ISRCs (every cover version or re-recording) but only one ISWC.
Publishers and collection societies match ISWCs to usage data so that songwriters get paid for every use of their composition, regardless of which artist recorded it.
How ISWCs are assigned
You don't buy an ISWC. It is assigned when your composition is registered with a collecting society or publisher, who submits it to CISAC's database.
Registering your songs this way is essential for collecting performance and mechanical royalties across borders.
Why songwriters should care
Without a registered composition, stream data that references your song may not be matched back to you as a writer, meaning unpaid royalties.
Zaventra Music Group's publishing administration registers your works with the relevant societies so your composition income is identified and collected.
Key Points
- Identifies a composition, not a recording
- Assigned by collecting societies via CISAC
- One ISWC per composition
- Key to writer royalty collection
Frequently Asked Questions
How do I get an ISWC?
Register your work with a performance rights organisation or publisher in your territory. They assign the ISWC through the CISAC network.
Do I need an ISWC as an artist?
If you are also a songwriter, yes — it ensures you're credited and paid as a writer. If you only perform others' songs, the composers handle registration.
Can a song have multiple ISWCs?
No — one composition should have exactly one ISWC. Duplicate registrations create matching problems, so register carefully.