Black Box Royalties: How to Search, Claim, and Get Paid

Black box royalties are music earnings that streaming services, radio stations, and other platforms have collected but can’t pay out because they don’t know who owns the song or the recording. The money sits in holding accounts at organizations like the Mechanical Licensing Collective, SoundExchange, and performing rights organizations. If nobody claims it within a few years, federal law lets it be redistributed to larger publishers based on their market share, and your earnings are gone for good. Claiming what’s yours means registering with each collection organization, correcting the metadata on your works, and filing claims before that redistribution clock runs out.

Where the Money Is Sitting

No single account holds every unclaimed music dollar. Royalties travel through different pipelines depending on how a song was used, and your money could be stuck in any of them.

Mechanical Royalties at the MLC

Every time someone streams a song on Spotify, Apple Music, Amazon Music, or another interactive service, the platform owes a mechanical royalty to the songwriter and publisher. Under the Music Modernization Act, the Mechanical Licensing Collective handles blanket licensing for interactive streams and collects those royalties on behalf of copyright owners.¹ When the MLC receives a payment it can’t match to a registered owner, it sits in a holding account as unmatched royalties. The MLC has received roughly $397 million in historical unmatched royalties and has matched and distributed about $234 million of that, leaving a substantial balance still waiting to be claimed.²

Performance Royalties at ASCAP, BMI, and SESAC

Public performance royalties come from songs played on radio, television, in restaurants, at live venues, and through background music services. ASCAP, BMI, and SESAC collect them and pay out to registered songwriters and publishers. When a performance can’t be matched to a registered writer, the revenue piles up in their holding accounts.

Digital Performance Royalties at SoundExchange

This is the stream most independent artists miss. Non-interactive digital services like SiriusXM, Pandora, and iHeart Radio owe performance royalties to recording artists, session musicians, and sound recording owners. SoundExchange is the sole organization authorized to collect and distribute these payments, and it maintains searchable lists of unregistered artists and rights holders on its site.³ If you’ve never registered, your money is accumulating unclaimed.

International Royalties

When your music plays overseas, a foreign collective management organization collects the royalties. Those societies use reciprocal agreements with U.S. PROs and collection societies to route payments back to American creators.⁴ If you aren’t registered with a domestic PRO and the MLC, foreign earnings have no way home. Some territories also require separate registration with their local society.

Why Your Royalties Are Stuck

The overwhelming cause is bad or missing metadata. Every song is really two copyrightable works: the composition (melody and lyrics) and the sound recording (the audio file itself). Each needs its own identifier to travel correctly through the royalty system.

The International Standard Recording Code (ISRC) identifies a specific sound recording; the International Standard Musical Work Code (ISWC) identifies the composition. Without them, automated royalty systems can’t route the payments, and the transaction gets logged as a no-match.⁵ Songwriters and publishers also need an Interested Parties Information (IPI) number, a globally unique identifier that links a person or entity to their works across collection societies worldwide.⁶ Your PRO assigns an IPI when you register. Without one, foreign societies holding your money have no reliable way to confirm you’re the right John Smith.

The other common trap is split sheet trouble. When co-writers register different percentages with their respective PROs or publishers, the totals submitted to the MLC or a PRO can exceed 100%. The system then flags a conflict and freezes the royalties rather than pay the wrong person.⁷ That money stays frozen until every party agrees on the correct shares.

What Happens If You Don’t Claim in Time

Federal law requires the MLC to hold unmatched mechanical royalties for at least three years after receiving them. During that window the funds earn interest at the federal short-term rate, and the interest accrues for whoever eventually claims the money.⁸

After that three-year window expires, the MLC is authorized to distribute unclaimed royalties to copyright owners already in its system, allocated by market share. The statute requires the distribution to be transparent and equitable and based on usage data showing each owner’s relative share of the streaming market.⁸ In practice, the largest publishers, the ones already collecting the most, receive the biggest share of the unclaimed pot. An independent songwriter who never registered gets nothing.

The MLC has said the market-share redistribution has not yet begun, and no such distributions have been made to date.² There is still time. But once redistribution starts, any funds already paid out to major publishers by market share are gone.

How to Search for Your Unpaid Royalties

No single search covers everything. Because royalties flow through different organizations, you need to check each one.

At the MLC, create a free member account and use the Individual Registration Tool to search by work title, writer name, and other criteria.⁹ If you find your work with unclaimed shares, you can move directly into the claiming tool. The MLC is required by statute to maintain this public facility so copyright owners can assert ownership of unmatched works.⁸

At SoundExchange, you can check their lists of unregistered artists, partially unregistered groups, unregistered performers, and unregistered sound recording owners, and use the ISRC Search tool without creating an account.³ If your name or recordings show up, register and use their Search & Claim tool to link them to your profile.

For public performance royalties, ASCAP and BMI jointly operate the Songview database, a combined public search of both organizations’ registered works. Search by song title or writer name to confirm your compositions are registered and that the ownership percentages match your records. SESAC operates a separate, invitation-only system; SESAC affiliates need to work through the member portal.

How to Register and File Claims

Searching is the easy part. Actually recovering the money means gathering documentation, registering with the right organizations, and filing claims correctly.

Gather Your Documentation

Before filing anything, assemble what proves ownership:

ISRCs for your sound recordings (from your distributor) and ISWCs for your compositions (from your PRO).
Signed split sheets showing each co-writer’s percentage, totaling exactly 100%.
Your IPI number, assigned by your PRO when you register as a songwriter or publisher.⁶
U.S. copyright registrations if you have them. They aren’t required to claim royalties, but they strengthen your position in a dispute. Musical compositions use Form PA and sound recordings use Form SR through the Copyright Office.¹⁰

Register With Every Organization That Collects for You

This is the step people skip. Each registration is independent, and each covers a different type of royalty:

The MLC for mechanical royalties from interactive streaming. Free.¹¹
ASCAP, BMI, or SESAC for public performance royalties. You can only belong to one at a time.
SoundExchange for digital performance royalties on sound recordings. Free, and separate from your PRO and from the MLC.³

Being a member of ASCAP doesn’t register you with the MLC. Being registered with the MLC doesn’t cover your SoundExchange royalties. Skip any of the three and you’re leaving a whole revenue stream uncollected.

File the Claim

Through the MLC’s Member Hub, search for your works and either claim available shares on works already in the system or register new works that aren’t there.⁹ Enter your ownership percentage and identify your co-writers. If the total shares claimed by all parties stay at or below 100%, the claim goes through and royalties are released. If they exceed 100%, the work moves into conflict status.

What Happens When Multiple People Claim the Same Work

Competing claims are common with co-writes and works that have moved through publishing deals. When claims push total ownership above 100%, the MLC places the work in conflict status and holds the royalties in an interim suspense account. Every claimant then gets a 30-day documentation window to submit evidence: signed publishing agreements, co-publishing or administration deals, split sheets, letters of direction, confirmed PRO registrations, U.S. copyright registrations, or a notarized declaration explaining ownership and chain of title.¹²

The MLC does not decide these disputes. If the documentation doesn’t bring the claims back to 100% or below, the work moves into full dispute status and the money stays frozen until the parties reach a written agreement or a court or arbitration panel issues a decision.¹² Get your splits documented before the money is on the table.

When You’ll Actually Get Paid

The MLC distributes royalties monthly, with payments arriving roughly 75 days after the end of each usage period. The system takes a snapshot of its database on the 10th of each month to lock in ownership data for the prior month’s streams.¹³ Register and claim before the snapshot, and your matched royalties should appear in the next cycle.

For historical unmatched royalties, the money that accumulated before you registered, timing depends on when the MLC matches your works to its backlog. The MLC has been working through historical periods and distributing matched funds on a rolling basis.² SoundExchange also runs on a regular distribution schedule; once you register and claim, accumulated back-royalties typically show up in the next distribution.

Tax Treatment of Recovered Royalties

Recovered royalties are taxable income, and a lump-sum payment for years of back-royalties can create a nasty tax surprise. Any organization paying you $10 or more in royalties during a year will send a Form 1099-MISC reporting that amount to the IRS.¹⁴

Where you report the income depends on how active you are in the music business. A working songwriter, producer, or artist who actively creates, promotes, or licenses music reports royalty income as self-employment income on Schedule C, subject to income tax and self-employment tax (15.3% for Social Security and Medicare). Someone passively collecting on older works with no ongoing business activity, such as an heir receiving royalties from a parent’s catalog, reports on Schedule E, subject to income tax only.¹⁵

If you haven’t provided a Taxpayer Identification Number to the paying organization, royalty payments may be subject to 24% backup withholding.¹⁴ You can reclaim it when you file, but it ties up cash in the meantime. Get a W-9 on file with every organization paying you.

Claiming Royalties for a Deceased Creator

When a songwriter or recording artist dies, the royalties don’t disappear, but they also don’t automatically redirect to family. Heirs have to take affirmative steps.

Copyright ownership passes through the estate like any other property. The executor or administrator can record the transfer with the U.S. Copyright Office to establish the new owner on the public record.¹⁶ Once ownership is established, the heir or estate registers with the MLC, the relevant PRO, and SoundExchange under the new owner’s account and claims the deceased creator’s works.

For works originally transferred to a publisher, heirs also have statutory termination rights. Federal law allows an author’s surviving spouse, children, or grandchildren to terminate a copyright transfer starting 35 years after the original grant. The surviving spouse owns the entire termination interest if there are no surviving children or grandchildren; if both survive, the spouse and children each own half.¹⁷ Exercising it requires written notice served on the publisher between two and ten years before the effective date and recording the notice with the Copyright Office. This right can’t be waived or contracted away.

To notify the MLC of a payee change from a statutory termination, the terminating party submits a copy of the termination notice filed with the Copyright Office, proof of recordation, and identifying information for the new rights holder. The MLC then notifies the previous copyright owner, who has 30 days to dispute. If no dispute is raised, the MLC updates its records and routes future royalties to the new owner.¹⁸

1
U.S. Copyright Office. The Music Modernization Act
2
Mechanical Licensing Collective. Historical Royalties
3
SoundExchange. Artists, Labels and Producers
4
World Intellectual Property Organization (WIPO). The Management of Copyright and Related Rights by Collective Management Organizations
5
U.S. Copyright Office. ISRC Agencies – Comments on Technological Upgrades to Registration and Recordation Functions
6
CISAC. IPI
7
ASCAP. What Co-Writers Need to Know About Songwriting Splits
8
Office of the Law Revision Counsel. 17 US Code 115 – Scope of Exclusive Rights in Nondramatic Musical Works: Compulsory License for Making and Distributing Phonorecords
9
Mechanical Licensing Collective. How to Register Works with The MLC
10
U.S. Copyright Office. Registration of Musical Compositions and Sound Recordings
11
Mechanical Licensing Collective. U.S. Copyright Office and The MLC
12
Mechanical Licensing Collective. The MLC Dispute Policy: Musical Work Ownership
13
Mechanical Licensing Collective. What Is the Payment Timeline?
14
Internal Revenue Service. Publication 1099 (2026), General Instructions for Certain Information Returns
15
Internal Revenue Service. Publication 525 (2025), Taxable and Nontaxable Income
16
U.S. Copyright Office. Assignment/Transfer of Copyright Ownership (FAQ)
17
Office of the Law Revision Counsel. 17 US Code 203 – Termination of Transfers and Licenses Granted by the Author
18
Federal Register. Termination Rights, Royalty Distributions, Ownership Transfers, Disputes, and the Music Modernization Act