Most independent artists know they're probably leaving money on the table somewhere. But knowing that in the abstract is very different from seeing it spelled out with specific causes and actual dollar amounts sitting uncollected. If you've been curious about a catalogue audit but not sure whether there's really anything to find — this is the piece for you. Because the findings aren't usually hypothetical. They're patterns. The same problems show up again and again, and once you understand what auditors actually uncover, it gets harder to look the other way.
Misregistered Splits That Block Royalty Payments
This is one of the most common finds, and it's almost always invisible from the outside. Here's how it typically happens: you make a song with another writer or producer, you both register it with your respective PROs, and neither of you used the exact same ownership percentages. ASCAP ends up with one set of split data. BMI has different numbers. The MLC has a third version. Nobody coordinated afterward, and years later there's a flag on that composition preventing it from paying out correctly.
In some cases the conflict means one party gets nothing — the disputed share sits unmatched while the underlying royalties accumulate. In others, both parties get partial amounts because the total exceeds 100% and the system doesn't know who to believe.
This shows up constantly with songs that had multiple producers on a track, or where a songwriter worked with a label before going independent. The label may have registered the song under its publishing company with its own split data, and the artist re-registered later without knowing — now there are two competing registrations and the system has no way to resolve them without someone stepping in. This is exactly the kind of issue covered in Registration Conflicts: What Happens When Co-Writers Register Different Splits.
Unclaimed Mechanicals Sitting at The MLC
The Mechanical Licensing Collective is sitting on a significant pool of unmatched royalties right now. These are mechanical royalties generated by streams on platforms like Spotify and Apple Music where the copyright information didn't match cleanly enough to route payment to the rightful owner.
For an artist who released music without clean metadata — missing IPI numbers, mismatched song titles, ISRC codes that weren't linked to the composition registration — those streaming royalties may have accumulated for years without ever hitting a bank account.
An audit cross-references your catalogue against MLC records to identify the gaps: songs you released but never registered, songs registered under a different title variant, or songs where your IPI number doesn't appear in the registration at all. This is particularly common for artists who were self-distributing in the early streaming era, before people fully understood that getting your music on Spotify did not automatically handle publishing registration. If this sounds familiar, How to Claim Unmatched Royalties at The MLC walks through the process once you've identified the gaps.
PRO Registration Errors That Shrink Your Performance Royalties
Performance royalties — the ones you earn when music plays on streaming platforms, radio, TV, or at live venues — flow through your PRO. But the amount you receive depends heavily on how accurately your songs are registered. Errors that audits surface regularly include:
- Registering the song but not all its recordings (different ISRCs from a re-release or remix)
- Missing the split between writer's share and publisher's share
- Incorrect territory data that limits collection to domestic royalties only
- Songs registered under a slightly different title, so usage can't be matched back to your account
The writer's share vs. publisher's share gap alone is significant. If you're an independent artist with no publishing company and no publishing administrator, there's a strong chance you're only receiving the writer's share of your performance royalties — while the publisher's share either goes unclaimed or reverts to the broadcaster or venue. Writer's Share vs. Publisher's Share: Why Independent Artists May Be Missing Half Their Royalties goes deep on how this works and what to do about it.
Metadata Errors That Cause Royalties to Go Unmatched
Metadata sounds dry, but it's the addressing system for music royalties. When the metadata on a recording doesn't match the data in a PRO or collection society's database, the royalty can't find its way home. Common metadata issues that turn up in audits:
- ISRC codes that were never registered with SoundExchange or linked to your PRO account
- Song title variations — feat. credits, different punctuation, shortened titles — that prevent automatic matching
- Missing or incorrect ISWC numbers on the publishing side
- Wrong release dates causing mismatches when DSPs report usage
These errors compound over time. A song released five years ago with a small metadata error has been generating unmatched royalties for five years. The older the catalogue, the more this adds up. And because many collection societies only hold unclaimed royalties for a limited window, time actually matters here — How Long Do Collection Societies Hold Unmatched Royalties? explains how those windows work and when you can lose access to funds permanently.
Royalties Stuck After a Distributor Switch
Distributor switches are surprisingly common royalty leak points. When you move from one distributor to another, your ISRC codes should transfer with you — but in practice they don't always follow cleanly. Streaming platforms sometimes assign new ISRCs to what is technically the same recording. Now you have multiple ISRCs for the same song, royalties splitting across them, and reporting that no longer aggregates properly.
If you switched distributors and re-uploaded your music, and noticed your stream reporting drop or go inconsistent after the switch, a metadata audit will often surface why. This is also where PRO registration breaks down: your PRO has the original ISRC on file, but DSPs are now reporting plays under a new one — the connection breaks, and performance royalties for streams under the new ISRC go unmatched. What Happens to Your Royalties When You Change Distributors walks through the full mechanics if you've been through this scenario.
What Happens After the Problems Are Found
Finding the issues is half the work; fixing them is the other half. An audit surfaces the gaps and documents them, but remediation involves:
- Filing corrected registrations with your PRO
- Submitting updated metadata to the MLC, SoundExchange, and relevant distributors
- Working with co-writers or their representatives to reconcile conflicting split registrations
- In some cases, filing a formal claim for unmatched royalties that have been accumulating
The key reason people hire professional auditors rather than doing this themselves is that the process requires knowing exactly what to look for, understanding each society's claims portal, and coordinating with multiple parties at the same time. Mistakes in remediation can also create new conflicts — so getting it right matters.
The other reason is documentation. An auditor builds a ledger of what was found and what it's worth, which is useful not just for claiming the money but for understanding the ongoing health of your publishing setup going forward.
Is There Actually Money There?
That depends on your catalogue size, how many collaborators you've worked with, how long you've been releasing music, and how carefully your registrations were set up from the start. For an artist with 20 or more songs released over three or more years, there's almost always something. For a catalogue with a mix of self-produced and co-written tracks, split registration conflicts are close to inevitable. For anyone who's changed distributors, switched PROs, or transitioned from a label deal back to independent — there are almost certainly gaps worth investigating.
The findings above aren't theoretical. They're what real catalogues look like under the hood when someone takes the time to look.
If you want to know what your catalogue looks like, Musicsplitsheets.com offers a Catalogue Audit service starting at $497. We dig into your registrations, cross-reference against PRO, MLC, and SoundExchange records, identify unmatched royalties, and give you a clear report of what we found and what to do about it.