What is an ISRC code and why does every recording need one?

An ISRC — International Standard Recording Code — is a unique 12-character identifier assigned to a specific sound recording. It follows the recording across every platform, registry, and collection society that processes it. Without one, royalty systems cannot reliably match a stream, broadcast, or sync placement to the correct rights holder. Most distributors auto-generate ISRCs, but artists who release independently, upload directly to platforms, or transfer recordings between distributors often end up with the same recording carrying multiple ISRCs — or none at all. The result is held royalties pending administrative resolution.

Do I need to register separately with each collection society?

Yes, and the requirements vary significantly by country. Your domestic PRO (ASCAP, BMI, or SESAC in the US; SOCAN in Canada; PRS in the UK) handles domestic performance royalties and maintains reciprocal agreements with international affiliates. But neighboring rights — separate royalties paid to recording rights holders for broadcast and public performance — require registration with a dedicated neighboring rights society like SoundExchange in the US or PPL in the UK. Signing up with one society does not automatically enroll you in the others, and international flows require separate registration with each relevant jurisdiction's collection body.

How do I find out if there are unclaimed royalties waiting for me?

The Mechanical Licensing Collective maintains a searchable database of unmatched royalties for streaming mechanicals in the US. ASCAP and BMI both have member portals that display claimed versus unclaimed works. For neighboring rights, SoundExchange has a searchable royalties database for US digital performance royalties. If you have significant international streaming history and have never registered with neighboring rights societies in those markets, reaching out to PPL, SCPP (France), or GVL (Germany) is worth the administrative overhead — unclaimed balances in these systems are not automatically returned to artists.

9 Metadata Errors That Quietly Drain Musician Royalty Income

Auditing a catalog’s publishing registrations is rarely a pleasant task, but artists who do it thoroughly almost always find the same thing: royalties that should have been paid weren’t, because some piece of metadata in the chain was wrong, missing, or inconsistent. Unlike distribution gaps or streaming rate shortfalls, metadata errors produce no warnings and no dashboard indicators. They generate silence — held balances, unmatched registrations, uncollected international income — that accumulates over years without any visible signal that something is wrong.

Nine specific errors account for the majority of avoidable royalty losses in independent catalogs. Each is correctable, and most require only administrative work rather than any legal intervention.

1. Missing or conflicting ISRC codes

The International Standard Recording Code is the universal identifier for a specific sound recording. Every royalty collection system — streaming platforms, broadcast monitoring services, neighboring rights societies — relies on the ISRC to match a play event to the correct rights holder. When an artist releases the same recording through multiple distributors or transfers catalog between distribution companies without porting the original ISRC, that recording can carry multiple competing codes. Collection societies cannot consolidate the data, and payments are held pending resolution rather than disbursed.

Register ISRCs directly with your national ISRC agency before distributing, then carry those codes through every subsequent release or catalog transfer. In the US, the RIAA administers ISRC registration at no cost for self-releasing artists. Treat your ISRC inventory with the same rigor you would apply to a copyright registration log.

2. Legal name discrepancies in songwriter credits

PROs, publishers, and collection societies match writer royalties using the legal name registered in their systems. When the name on a composition registration does not exactly match the name filed in distribution metadata — even minor discrepancies like “M. Halverson” versus “Marin Halverson” — the matching algorithm treats them as potentially different individuals. Royalties are held rather than paid. Across a catalog with multiple co-writers and several collection societies, small inconsistencies accumulate into substantial holdback balances.

Stage names compound this problem. An artist who releases under a mononym but registered their PRO account under a legal name must ensure that every registration document reflects both, explicitly linked. The standard practice is to register the performing name as a verified alias on the PRO account and then include both on all metadata submissions going forward.

3. Duplicate title registrations with variant spellings

A composition registered at a PRO as “The River Road” that appears in streaming metadata as “River Road” (without the definite article) creates a split registration problem. Monitoring services and collection societies that rely on phonographic data to match cue sheets and broadcast logs cannot confidently attribute performance data to the correct work. In sync contexts specifically — where cue sheets are the primary documentation used to calculate royalty payments — a title mismatch means the cue sheet cannot be reconciled against the registration, and the payment is deferred or denied.

Standardize title formatting across every registry before distribution: identical capitalization, punctuation, and rendering of numerals and special characters. Then audit the registration against the distributor metadata to confirm they match exactly. This is a ten-minute task per release that eliminates a class of errors that otherwise requires months to unwind.

4. Missing publisher registration and forfeited publisher share

Independent artists who own their compositions are, by default, their own publishers — but that status must be formally registered with the PRO, not assumed. An artist who registers as a songwriter without simultaneously filing a publishing entity forfeits the publisher’s share of performance royalties. Under the standard PRO model, performance royalties are split 50/50 between the writer and the publisher. If the publisher share has no registered recipient, it does not automatically revert to the writer; it sits in an undistributed pool held by the PRO.

Registering a publishing entity requires only a small annual fee at most PROs and about an hour of administrative work. The income recovered from that registration — a full 50 percent of the performance royalty stream on owned compositions — makes it one of the most straightforward financial corrections available to self-releasing musicians.

5. Absent split sheets on co-written works

When two or more writers contribute to a composition, each writer’s ownership share must be formally documented and filed. A split sheet is not a legal requirement for release, but it is necessary for royalties to be correctly distributed across all contributors. Without one, collection societies default to equal-share assumptions when a dispute or matching ambiguity arises — and those default splits rarely reflect what the writers agreed to at the time of creation.

The practical consequence: if one co-writer registers their share with a PRO and the others do not, royalties for the unregistered shares are held pending documentation. The Music Modernization Act, administered through the US Copyright Office, strengthened protections for co-writers in digital contexts, but the documentation still must be filed by the rights holders themselves. Informal co-writing relationships left unpapered are a reliable source of permanently lost income.

6. Missing IPI numbers on composition registrations

The Interested Parties Information number (IPI, formerly CAE) is the permanent identifier assigned to a songwriter or publisher upon PRO registration. It functions as an ISRC for individuals: a stable, globally recognized code that collection societies worldwide use to attribute royalties to the correct person across jurisdictions. When composition registrations are submitted without the IPI number included — which happens frequently when registrations are submitted through third-party administrators who pull from incomplete databases — international affiliates may not be able to link the payment to the correct domestic PRO account.

This error matters most for artists with international audiences. A musician based in the US with consistent streaming in Germany or Japan who has omitted their IPI from relevant international registrations is losing a portion of the performance royalties those affiliates collect on their behalf, with no notification that it is happening.

7. No neighboring rights registration in international markets

Neighboring rights are a separate royalty category from performance and mechanical royalties. They are paid to the owners and performers of sound recordings when those recordings are broadcast or publicly performed. In the United States, SoundExchange collects neighboring rights for digital audio services. In the UK, PPL handles both performer and recording owner rights. Across the EU, dedicated neighboring rights societies administer parallel systems, and rates in some markets are substantially higher than their US equivalents.

Independent artists who control their master recordings are entitled to these royalties, but collection is not automatic and registration with each relevant society is required. An artist with catalog active across European streaming and broadcast markets who has not registered with PPL and the relevant EU bodies is forfeiting a revenue stream with no analog on the distribution side. According to data from IFPI’s annual Global Music Report, neighboring rights represent a growing share of total music industry revenue, particularly in Western Europe.

8. P-line discrepancies between release and registration records

The P-line (℗) is the phonogram copyright notice that identifies the legal owner of a sound recording and the year of first publication. It appears on digital release metadata and physical product. When the P-line does not match the name of the entity registered as the rights holder with SoundExchange, PPL, or another neighboring rights society, those societies may defer payment pending documentation that confirms ownership.

This error is especially common when an artist releases through a distribution company that auto-populates the P-line with its own name as a default. Read every metadata field your distributor generates and verify that the P-line correctly names you, or your label entity, as the recording rights holder before the release goes live. Correcting it after the fact requires contacting both the distributor and any affected collection societies to amend records, which is substantially more work than getting it right on the initial submission.

9. Catalog numbering inconsistencies in sync contexts

Catalog numbers are the internal identifiers assigned to releases by a label or self-releasing artist. Used inconsistently, they create reconciliation problems across retail and collection systems. A release appearing with different catalog numbers across platforms, or with a number that conflicts with a different release in a collection society’s database, generates matching conflicts similar to ISRC duplication errors.

This matters most in sync licensing. When a music supervisor licenses a track and the sync contract references a catalog number that doesn’t match what appears on a PRO registration or cue sheet, the sync royalty pathway is disrupted. Because per-use sync fees are substantially higher than per-stream rates, a single unresolved catalog number conflict in a recurring sync placement — a TV show that airs in syndication, for instance — can represent a more meaningful loss than months of streaming metadata errors combined.

Running the audit

Correcting these errors requires a systematic approach rather than spot repairs. Start with the ISRC inventory: pull every recording from your distributor account and confirm each has a unique, consistent code. Cross-reference those against your PRO composition registration list, then against your split sheet documentation. The end goal is a ledger where every release has a verified ISRC, a matched composition registration, confirmed split documentation for co-written works, and a verified registration status at every relevant collection society.

For artists with existing catalog and no prior audit, this work reliably uncovers both held royalties available for retroactive claiming and ongoing gaps that are actively losing income. The practical mechanics of PRO registration and the royalty collection ecosystem are covered in detail in the PRO royalty collection basics dispatch. For the mechanics of how streaming mechanicals and the Music Modernization Act interact with these registration requirements, the streaming payout problem piece addresses the mechanical royalty side specifically. For sync income — where catalog number and metadata precision has the highest per-error cost — the sync licensing primer covers the documentation standards music supervisors expect when licensing independent catalog.

9 metadata errors that quietly drain musician royalty income.