Reference · Glossary

Glossary of terms.

28 entries · last updated 16 May 2026

Plain-English definitions of the music industry vocabulary Music Intel works with day-to-day. Identifiers, royalty types, collecting societies, and the core concepts behind them. Cross-linked to the relevant Field Notes where the topic has been written up in depth.

28 entries

Identifier

ISRC

International Standard Recording Code

A unique 12-character identifier for a sound recording (a master). Issued by national agencies, formatted as country code + registrant + year + designator.

Why it matters. Where most royalty questions begin. If two streams of the "same" track carry different ISRCs, the system treats them as different recordings. Mismatches between ISRC and ISWC are the single biggest cause of unmatched royalty pools.

Identifier

ISWC

International Standard Musical Work Code

A unique identifier for a musical composition (a song), independent of any specific recording. Issued by CISAC and administered by national societies.

Why it matters. A song is one thing. Its recordings are many. ISWC names the song; ISRC names each recording. The link between ISWC and ISRC is what tells a society who wrote the underlying composition behind a stream.

Identifier

IPI

Interested Parties Information

A unique identifier for a person or organisation involved in a musical work (writer, composer, publisher, sub-publisher). Maintained by SUISA on behalf of CISAC.

Why it matters. IPI numbers travel with works through the global rights chain. A song has an ISWC; the people credited on it have IPI numbers. Royalty distribution depends on getting both right.

Identifier

CWR

Common Works Registration

The international file format used to register and exchange musical works between publishers and societies. A CISAC standard, originally 1999, periodically revised.

Why it matters. A composition is registered to a society by uploading a CWR file. Errors in CWR registration (missing IPI, wrong split, malformed line) silently break royalty distribution. Field Notes covers this in detail; CWR-breaking is the single most fixable cause of unmatched royalties.

Royalty

Mechanical royalty

A royalty paid for the reproduction of a musical work onto a fixed medium (vinyl, CD, MP3, streaming download, interactive stream). Owed to the songwriter and publisher of the underlying composition.

Why it matters. In the US, the MLC collects mechanicals from streaming services. In the UK, MCPS (operated by PRS) does. Mechanicals are distinct from performance royalties even though both pay the writer side - a stream generates both.

Royalty

Performance royalty

Public performance royalty

A royalty paid when a musical work is performed in public - on radio, on TV, in a venue, on streaming services. Owed to the writer-publisher side, collected by Performing Rights Organisations (PROs).

Why it matters. A single stream typically generates a mechanical and a performance royalty plus a master royalty - three distinct money flows from one play, collected by different bodies, paid to different parties.

Royalty

Sync royalty

Synchronization royalty

A licence fee paid for the use of music in synchronisation with visual media: film, TV, advertising, video games, streaming visual content. Negotiated per use, not collected by societies.

Why it matters. Sync income is one-off and lumpy compared to streaming royalties. For catalogue funds and publishers, it can be the highest-value royalty stream per use, but pursuing it requires direct relationships with music supervisors and ad agencies.

Royalty

Neighbouring rights

Equitable remuneration

Royalties paid to performers and master-recording owners (rather than the writer side) when a recording is publicly performed - radio, public venues, TV background. Distinct from performance royalties on the composition.

Why it matters. A recording artist who did not write the song still earns from radio play through neighbouring rights. PPL collects in the UK, SoundExchange collects digital performance equivalent in the US. Field Notes 024 covers why these are the most systematically underclaimed income stream in recorded music.

Concept

Master rights vs publishing rights

Recording rights vs composition rights

A recorded track has two underlying copyright layers. Master rights cover the specific recording (owned typically by the label or artist). Publishing rights cover the underlying composition (owned by the songwriter and publisher).

Why it matters. A label can own the master without owning the publishing. A publisher can own the song without owning any recording of it. Royalty flows are calculated against both layers separately and can have completely different ownership chains.

Organisation

CISAC

International Confederation of Societies of Authors and Composers

The global federation of authors and composers societies. Represents around 240 societies in over 120 countries. Sets technical standards (ISWC, IPI, CWR), publishes annual global collections data.

Why it matters. CISAC numbers are the closest thing to an authoritative global view of writer-side royalty collections. Annual figures often cited in policy debates and Field Notes pieces.

Organisation

MLC

Mechanical Licensing Collective

The US blanket-licence administrator for digital audio mechanical royalties from streaming services. Created by the Music Modernization Act 2018, operational from 2021.

Why it matters. The MLC holds the headline "$561M unclaimed" figure that defines the US conversation about black-box royalties. One country, one rights type, one collection body - and the global total is many multiples of it.

Organisation

PRS

Performing Right Society

The UK collecting society for performance royalties on the writer-publisher side. PRS for Music. MCPS, the mechanical-royalty arm, operates alongside under the same umbrella.

Why it matters. If a song is played in the UK - on radio, in a pub, on a streaming service, on TV - PRS collects the writer-side performance share and distributes it to the registered writers and publishers via CWR data.

Organisation

PPL

Phonographic Performance Limited

The UK collecting society for neighbouring rights on the performer-master side. Collects equitable remuneration when a recording is publicly performed.

Why it matters. PPL pays performers and rights-owners of the recording, where PRS pays writers and publishers of the composition. Both are triggered by the same play. A complete UK royalty picture for a single artist needs both.

Organisation

ASCAP

American Society of Composers, Authors and Publishers

One of the three primary US Performing Rights Organisations (alongside BMI and SESAC). Collects performance royalties on the writer-publisher side from radio, TV, venues, streaming services.

Why it matters. A US writer typically affiliates with ASCAP, BMI, or SESAC - not all three - and that affiliation determines who collects on their behalf. Catalogues bought across affiliations require coordinated administration.

Organisation

BMI

Broadcast Music, Inc.

The second of the major US PROs. Collects performance royalties on the writer-publisher side. Largest by repertoire as of recent CISAC reporting.

Why it matters. Until 2024 BMI was a non-profit. It was acquired by the New Mountain Capital private equity group, which has reshaped how the US PRO market is read. Catalogue funds doing US due diligence track this closely.

Organisation

SoundExchange

The US collecting society for digital-performance neighbouring rights. Distributes royalties to performers and master-rights owners when their recordings are streamed on non-interactive services (US-licensed satellite, webcaster, simulcast).

Why it matters. SoundExchange is the closest US equivalent of UK PPL for digital performance, though the licensing scope is narrower than PPL's broadcast-and-public-place reach.

Concept

Black box

Unmatched royalties, unclaimed royalties

Royalty income collected by a society or distributor but not yet attributed to a specific rights-holder due to incomplete or mismatched registration data. Held in suspense pools, eventually distributed pro-rata to known members or written off.

Why it matters. The single largest cause of writer-side income leakage. Field Notes 012 quantifies the US picture (the much-cited $561M MLC number); Field Notes 021 extrapolates the global figure. Recovering black-box money requires forensic ISWC, IPI, and CWR work.

Concept

DSP

Digital Service Provider

A streaming or digital download service that pays royalties to rights-holders. Spotify, Apple Music, Amazon Music, YouTube Music, Tidal, Deezer, and similar services are DSPs.

Why it matters. DSP-level royalty data is the modern equivalent of monthly statements. The fragmentation of payment formats and reporting cycles across DSPs is one of the biggest practical obstacles to a unified rights view.

Concept

Catalogue audit

Royalty audit, due diligence audit

A structured forensic review of a music catalogue (typically by a publisher, label, or rights-investment fund) to identify missing royalty streams, registration gaps, and recoverable income.

Why it matters. Used in two contexts. Pre-acquisition due diligence: validating projected income before a fund buys a catalogue. Post-acquisition recovery: finding what the previous owner missed. Field Notes 025 walks through what an audit actually finds.

Concept

Metadata reconciliation

The process of matching, validating, and de-duplicating identifiers across systems - typically ISRC, ISWC, IPI, artist name, and rights-holder records - to produce a single coherent catalogue view.

Why it matters. Nearly every royalty problem reduces to a metadata problem. Reconciliation is what turns a pile of incomplete statements from multiple DSPs and societies into a structured catalogue view that can be audited, valued, or reported on.

Royalty

Black box royalty

Unclaimed royalty, unmatched royalty pool

Revenue collected by a collection society, DSP, or distributor that cannot be attributed to a specific rights-holder because registration data is missing, incomplete, or contradictory. Held in suspense accounts until claimed, matched, or eventually distributed pro-rata.

Why it matters. The MLC alone holds an estimated $561M in unmatched mechanical royalties from US streaming. Globally, the total black box across all territories and rights types is estimated in the billions. Recovery requires forensic matching of ISRC, ISWC, and IPI data against the documentary record - exactly what Black Box Royalty Investigator automates.

Concept

Mechanical gap

Mechanical royalty shortfall, composition gap

The difference between mechanical royalties that should be paid on a composition (based on verified streaming activity) and mechanical royalties actually received by the writer or publisher. Caused by incomplete CWR registrations, missing society memberships in key territories, or incorrect split allocations.

Why it matters. A mechanical gap is not theft - it is a systemic failure of registration infrastructure. The work performs, the money is collected, but nobody has filed the paperwork that tells the society who to pay. Field Notes 012 details how even well-administered catalogues routinely leak 3-8% of mechanical income through registration gaps alone.

Identifier

ISRC collision

ISRC conflict, duplicate ISRC

A situation where the same ISRC (International Standard Recording Code) has been assigned to two or more different recordings, or where the wrong ISRC is attached to a recording at the distribution stage. The downstream effect is that streaming usage is logged but credited to the wrong rights-holder.

Why it matters. ISRCs are supposed to be globally unique, but collisions happen regularly in practice - through re-use of codes across re-releases, errors during digital distribution, or legacy catalogue migrations. The damage is silent: royalties flow, but to the wrong party. Black Box identifies collisions through its ISRC Health Checker, which runs batch verification across five status levels: Clean, Collision, Unregistered, Mismatch, Not Found.

Concept

CWR processing

Common Works Registration processing, CWR filing

The process of preparing, validating, submitting, and tracking CWR (Common Works Registration) files to collection societies for the purpose of registering musical works and their associated rights-holders. Includes formatting writer credits, IPI numbers, territory allocations, and share splits to CISAC specification.

Why it matters. A single malformed CWR line can silently prevent a work from being registered in a territory for years. The most common errors: incorrect IPI attribution, missing territory designations, malformed share splits that do not sum to 100%, and character encoding failures in non-Latin titles. Black Box scores CWR health as part of its discovery phase and can generate corrected CWR output for re-filing.

Concept

Royalty recovery

Royalty recoupment, back-royalty claim

The systematic identification, documentation, and claiming of royalties that were collected but never paid to the correct rights-holder due to registration failures, identifier mismatches, or administrative errors. Distinct from royalty collection (ongoing) - recovery addresses historical underpayment.

Why it matters. Recovery is forensic work: you must prove that a specific work performed in a specific territory, that the royalties were collected by a specific society, and that the registration data was insufficient for that society to pay the correct party. The output is an evidence pack, not a claim letter. Black Box automates this process against a 207M-track reference catalogue, producing tribunal-grade documentation.

Concept

Streaming fraud detection

Artificial streaming detection, bot farm detection

The identification of artificially inflated streaming numbers through bot farms, manufactured listeners, coordinated playlist manipulation, or automated playback scripts. Fraud detection systems analyse listening patterns, geographic distribution, playlist behaviour, and temporal anomalies to distinguish genuine engagement from artificial inflation.

Why it matters. An estimated $2 billion per year is lost to artificial streaming across the industry. Platforms penalise the artist and distributor - not the fraud operator. StreamShield (part of Musicata Pro) uses machine-learning models built on forensic methodology to classify artist-level fraud risk across five levels: Clean, Suspect, Under Investigation, Suspended, Blocked. The system identifies contradictions before platforms act on your artists.

Concept

Music rights management

Rights administration, catalogue rights management

The administration of intellectual property rights across musical works and recordings: tracking ownership, managing registrations with collection societies, ensuring correct royalty flows, handling territory-specific licensing, and maintaining the chain of title through acquisitions, reversion clauses, and split changes.

Why it matters. Rights management is the connective tissue between creation and payment. A song generates mechanical, performance, neighbouring, and sync royalties - each collected by different bodies, in different territories, against different registrations. Managing this across a catalogue of thousands of works requires structured data infrastructure, which is what Music Intel provides through its cross-reference engine and CWR scoring system.

Royalty

Performance rights

Public performance rights, performing rights

The rights associated with the public performance of a musical composition - including radio broadcast, TV transmission, live venue performance, streaming, and background music in commercial premises. Administered by Performing Rights Organisations (PROs) such as PRS, ASCAP, BMI, GEMA, and SACEM.

Why it matters. Performance rights generate a royalty every time a composition is performed publicly, regardless of who performs it. A cover version on radio generates performance royalties for the original songwriter. PROs collect on behalf of affiliated writers and publishers; the challenge is ensuring every territory where the work performs has a valid registration against the correct IPI. Gaps in PRO registration are one of the most common causes of uncollected performance royalties.