What is Music Metadata and Why Does it Matter?

What is music metadata?

Metadata, in any context, is data that describes other data. In music, metadata is the structured information attached to a recording or composition that identifies it, attributes it to its creators, and enables it to be tracked through commercial systems. When a track is streamed on Spotify, broadcast on BBC Radio 1, or licensed in a film, the systems handling that usage rely entirely on metadata to determine who owns the rights and where the payment should go. Without accurate metadata, the track is effectively anonymous to the machines that process royalties — and anonymous tracks do not get paid.

The two layers of music metadata

There are two distinct layers of metadata, corresponding to the two distinct rights in any commercially released song. Recording metadata identifies the master recording — the specific audio file that was released. It includes the ISRC, the performing artist name, the release date, the record label, the UPC, the duration, and the audio file format. Composition metadata identifies the underlying song — the words and music. It includes the ISWC, the songwriter names, the publisher name, the ownership splits, and the language. Both layers must be complete and accurate for royalties to flow correctly. A recording with a perfect ISRC but a missing ISWC will collect recording royalties but miss composition royalties. An ISWC with a missing ISRC will collect composition royalties but miss recording royalties. The two codes are the bridge between what was played and who gets paid on both sides.

Key metadata fields every release needs

The following fields are non-negotiable for a release that is correctly set up to collect across all royalty streams:

• ISRC (International Standard Recording Code) — unique identifier for each recording. Every distinct version of a track (album version, radio edit, remaster, remix) must have its own ISRC.
• UPC (Universal Product Code) — identifies the release as a product (album, EP, single). Required for chart eligibility and retail distribution.
• ISWC (International Standard Musical Work Code) — unique identifier for the composition. Assigned by PRS in the UK. Essential for PRO royalty matching.
• Artist name — must be consistent across all releases to ensure profile integrity on streaming platforms.
• Songwriter credits — full legal names of all co-writers and their agreed ownership percentage.
• Publisher name and split — required for PRO matching of the publisher share.
• Genre and subgenre — influences algorithmic discovery on streaming platforms.
• Language — used by international PROs and streaming platforms for regional royalty routing.
• Release date — must match across distributor, PRO registration, and streaming platform metadata to avoid matching conflicts.

How bad metadata causes lost royalties

The failure modes are numerous and compounding. An ISRC that was never linked to an ISWC during works registration means that when a broadcaster submits a playlist log, the matching system finds the recording but cannot identify the composition — and the mechanical and performance royalties for that broadcast do not distribute. A misspelled artist name causes a streaming platform to create a duplicate artist profile, splitting streaming history and confusing algorithmic recommendations. A missing or incorrect publisher field means the publisher share of every stream and broadcast goes uncollected for the life of that registration. An incorrect co-writer split that was never corrected at PRS means one writer is systematically overpaid and another underpaid, sometimes for years before anyone notices. Each of these errors is individually small and collectively catastrophic for a growing catalog.

Who is responsible for metadata in the release chain?

In theory, the artist and their team are responsible for supplying correct metadata at the point of release. In practice, the release chain has multiple handoff points — from the artist to the distributor, from the distributor to the platform, from the platform back to the PRO via usage reporting — and errors can be introduced at any stage. Distributors typically pass through whatever metadata they receive without auditing it for PRO compliance. Streaming platforms store the metadata from delivery and may not update it promptly when corrections are requested. PROs work from their own registration system, which may diverge from what the distributor delivered. The only way to ensure consistency across the full chain is deliberate metadata management — not just at upload, but as an ongoing discipline.

Code Group Music's Metadata Administration service audits your existing catalog for missing and incorrect metadata, corrects registrations across PRO and distribution systems, and maintains an accurate catalog registry going forward. If you suspect metadata errors are costing you royalties, a free Catalog Assessment is the right first step. Begin at codegroupmusic.co.uk/#catalog-assessment.