TL;DR
Seven specific metadata errors are responsible for the majority of missed royalties for independent artists: ISRC mismatches, missing ISWCs, name inconsistencies, disconnected co-writer registrations, unlinked distributor and PRO records, missing publisher entities, and territory registration gaps. Each one silently blocks a different royalty stream. Most are fixable in under 30 minutes once identified.
The music industry runs on metadata. Not the emotional metadata — the passion, the story, the lyrics — but the technical metadata: a 12-character recording code, a 15-character composition identifier, a name spelled exactly the same way in six different databases.
When that metadata is correct, royalties flow automatically. When it's wrong, they don't — and no one tells you. The PRO doesn't call. The MLC doesn't send an email. The royalties just sit in an unmatched pool or get redistributed to other rights holders.
According to The MLC's 2023 Annual Royalty Recap, over $400M in US mechanical royalties is currently unmatched — almost entirely due to metadata problems. According to CISAC's Global Collections Report 2024, global royalty collections reached €12.59 billion in 2024, with an estimated 15–20% going unmatched. That's up to €2.5 billion in royalties blocked by fixable data errors.
Here are the seven errors causing most of it.
Error 1: ISRC Mismatch Between Distributor and PRO
Your distributor (DistroKid, TuneCore, CD Baby) assigned an ISRC to your recording at upload. Your PRO (ASCAP, BMI) has a different ISRC — or no ISRC at all — linked to that work.
Streaming platforms report plays using your distributor's ISRC. PROs try to match those reports against their registered works. When the ISRCs don't match, the connection fails.
How to fix it: Log into your distributor and find the ISRC for each track. Log into your PRO and add or correct the ISRC on each work registration. Log into The MLC and do the same.
This single fix is responsible for recovering more royalties than any other item on this list.
Error 2: Missing ISWC
An ISWC (International Standard Work Code) is the composition-level identifier — the "license plate" for the song itself, as opposed to a specific recording. It looks like: T-034.524.680-1.
ISWCs are essential for international royalty collection. When CMOs in Germany, the UK, Japan, or Australia process royalty payments, they use ISWCs to identify compositions. Without an ISWC:
- Your composition has no global identifier
- International CMOs cannot reliably match plays to your work
- International performance and neighboring rights royalties accumulate in foreign black boxes
Unlike ISRCs (which distributors assign automatically), ISWCs must be requested. They are assigned by the CISAC system through your PRO. Registering your works with ASCAP or BMI triggers ISWC assignment — but only if the registration is complete and accepted.
How to fix it: Confirm that each of your registered works at your PRO shows an ISWC. If not, complete the work registration correctly (including all required fields) and the ISWC will be assigned.
Error 3: Name Inconsistencies Across Platforms
Your legal name is "Alexandra Reeves." On DistroKid you registered as "Alex Reeves." Your ASCAP account says "A. Reeves." Your Spotify artist profile says "Alexandra Reeves." Your BMI registration (from a co-writer's registration of your shared song) also says "Alexandra K. Reeves."
To automated matching systems at PROs and CMOs, these are potentially four different people. Royalties reported for plays of "Alex Reeves" don't automatically match the account registered as "Alexandra K. Reeves."
This problem compounds internationally. GEMA (Germany) and PRS (UK) receive royalty reports from streaming platforms, cross-reference them against their databases, and then cross-reference against their reciprocal agreements with your PRO. Every name variation introduces another potential breakage point in that chain.
How to fix it: Establish a canonical version of your name. Use it consistently everywhere: distributor profile, PRO registration, MLC registration, SoundExchange, all social/streaming profiles. Update each database to use the canonical name. For PROs, update your work registrations to use the correct name.
Error 4: Unregistered or Mismatched Co-Writer Splits
If you co-wrote a song and one co-writer isn't registered with any PRO, or if the split percentages don't match between what you registered at your PRO and what your co-writer registered at theirs, the work is flagged as having incomplete ownership data.
In many PRO systems, an incomplete or conflicting ownership record causes royalties to be held for all writers — not just the problematic share. The average independent artist's catalog has at least one co-written song with this issue.
How to fix it: Audit your co-written songs. For each one, verify that all co-writers are PRO-affiliated and that the split percentages are consistent across all PRO registrations and The MLC. For co-writers who aren't registered, coordinate their registration before or immediately after release.
Error 5: Distributor Record and PRO Registration Never Linked
This is subtler than an ISRC mismatch. The ISRC may be correct in both systems — but there's no explicit link connecting your distributor record (the release that's live on Spotify) to your PRO work registration.
This happens most often when you register with your PRO without providing the ISRC, or when you upload to your distributor without referencing your existing PRO registration. The systems exist in parallel rather than connected.
Some PROs and licensing bodies are moving toward automated linking, but it's not universal. Many royalty matching failures occur not because data is wrong but because it was never connected in the first place.
How to fix it: In your PRO work registration, add the ISRC(s) of the released recording. If your work was registered before you distributed it, update the PRO registration with the ISRC your distributor assigned.
Error 6: Missing Self-Publishing Entity
When a PRO distributes royalties for a song, it splits the payment into two equal halves: the songwriter's share and the publisher's share. If you're an independent artist who writes your own songs, you're entitled to both halves — but only if you've registered a publishing entity with your PRO.
Many independent artists register as songwriters but never register a publishing entity. They receive 50% of their royalties — the songwriter's share — and the publisher's share goes unclaimed or is held until a publisher is designated.
How to fix it: Register a self-publishing entity with your PRO. The name can be anything — "[Your Name] Music," "[Your Name] Publishing," or any company name you use. This takes about 10 minutes. Once registered, update your existing work registrations to designate this entity as the publisher.
Error 7: Territory Registration Gaps
Your ASCAP or BMI registration covers the US. But royalties from Germany, the UK, Japan, Canada, France, and Australia are collected by separate CMOs in each country — and paid out based on registration data in each country's system.
Your US PRO has reciprocal agreements with most international CMOs, meaning your registration at ASCAP should theoretically flow through to affiliated societies. In practice, many registrations don't propagate correctly because:
- The ISWC is missing (so the work can't be linked internationally)
- The work metadata doesn't meet the format requirements of specific foreign CMOs
- CWR (Common Works Registration) files, the standard format for international registrations, were never filed
For independent artists with meaningful international plays, territory registration gaps are often the single largest source of uncollected royalties — because the amounts that accumulate across 150+ countries can be substantial.
How to fix it: Ensure your works have correct ISWCs. Ask your PRO about international work registration and whether your catalog has been submitted through their reciprocal network. For catalogs with significant international exposure, a CWR filing through an administrator or service like CreateBase is the most reliable approach.
What CreateBase Does for Metadata Errors
CreateBase's core service is finding and fixing exactly these seven types of errors:
- Full catalog audit against distributor records, PRO databases, MLC, and SoundExchange
- ISRC and ISWC reconciliation across all relevant systems
- Name consistency review and correction
- Co-writer split verification and coordination
- Self-publishing entity registration
- CWR filing for international territory gaps
Get a free audit of your catalog's metadata errors → CreateBase delivers a free personalized royalty gap report within 48 hours.
Frequently Asked Questions
Q: Which metadata error costs independent artists the most money?
A: ISRC mismatches (Error 1) and missing ISWCs (Error 2) are typically the highest-impact errors in dollar terms, because they block royalties across multiple organizations simultaneously. An ISRC mismatch affects performance royalties, mechanicals, and SoundExchange income. A missing ISWC blocks international royalty flows from over 150 countries. That said, for artists with significant co-writing catalogs, unregistered co-writer splits (Error 4) can be equally costly.
Q: How do I find out if my metadata has errors?
A: The most thorough approach is to export your full catalog from your distributor (DistroKid, TuneCore, etc.) with all ISRCs, then compare against your PRO work registrations. Look for ISRCs that don't match, works with missing co-writer data, and works without ISWCs. The MLC's public search tool lets you search for your songs and see whether their records have matching ISRC data. SoundExchange also has an unclaimed royalties search.
Q: What is an ISWC and how is it different from an ISRC?
A: An ISRC (International Standard Recording Code) identifies a specific sound recording — a particular version of a song by a particular artist. An ISWC (International Standard Work Code) identifies the underlying musical composition — the song itself, regardless of who records it. A single composition can have hundreds of ISRCs (one for each recording), but it has only one ISWC. ISRCs are assigned by distributors; ISWCs are assigned by CISAC through PROs. Both are needed for complete royalty collection.
Q: Can I fix metadata errors retroactively and collect past royalties?
A: Yes, for royalties still within their holding period. In the US, The MLC holds unmatched mechanical royalties for a minimum of three years before redistribution. ASCAP and BMI hold unmatched performance royalties for varying periods. SoundExchange maintains an unclaimed royalties database. Once you correct the underlying metadata error and file a claim with the relevant organization, retroactive payments can be issued for the period during which the royalties were held.
Q: My name is the same everywhere. Why are my royalties still unmatched?
A: Name consistency is necessary but not sufficient. The most common cause of royalties going unmatched even with consistent names is the ISRC-PRO disconnect (Error 5) — where the ISRC in the streaming platform's report doesn't exist in your PRO's database. If your name matches but your ISRC doesn't, the royalty still goes unmatched. Check that the ISRCs in your PRO registrations match the ISRCs assigned by your distributor.
Sources
- The MLC 2023 Annual Royalty Recap — Over $400M in unmatched US mechanical royalties; $3B+ distributed since 2021
- CISAC Global Collections Report 2024 — €12.59B in global royalty collections in 2024; ~15–20% unmatched
- ISRC International Agency — ISRC standards and assignment
- CISAC ISWC Agency — ISWC assignment and standards
- ASCAP and BMI — Work registration and publisher enrollment