Plain-language definitions of the terms used across music rights, royalties and metadata.
Each definition stands on its own, and every term has its own link, so you can point
straight to it.
A musical work is a song or composition: its melody, harmony and lyrics, as written by its songwriters and composers. It is owned by its writers and their music publishers, and is separate from any recording of it.
A sound recording, often called a master, is a specific recorded performance of a musical work. It is usually owned by the record label or the artist that paid for the recording.
Copyright is the legal right to control how a creative work is copied, performed, distributed and adapted. In music, separate copyrights exist in the musical work and in each sound recording of it.
The P-line is the copyright notice for a sound recording, shown as ℗ followed by the year of first release and the name of the sound recording rightsholder, for example "℗ 2026 Example Records". It identifies who owns the master.
Neighbouring rights (also called related rights) are rights that performers and sound recording rightsholders hold when recorded music is broadcast or played in public. They are collected by neighbouring rights societies.
The sound recording rightsholder, or phonogram producer, is the person or company that owns a master recording, usually a record label. It receives the producer share of neighbouring rights income.
A performer is anyone whose performance is captured on a recording. Featured performers are the credited artists. Non-featured performers include session musicians and backing vocalists. Both can be entitled to neighbouring rights income.
Songwriters, composers and lyricists (authors) create musical works. They receive the writer share of publishing income, usually through a collecting society and their publisher.
A music publisher represents songwriters and their works. It registers works, licenses them, collects royalties and pays writers their share under their agreements.
The performance right covers playing or broadcasting a musical work in public, including radio, TV, live venues, businesses and streaming. It is usually collected by performing rights organizations.
The mechanical right covers reproducing a musical work, for example on a CD, download or stream. It is usually collected by mechanical rights organizations or licensed directly by publishers.
The sync right covers pairing music with visual media such as films, TV shows, adverts and games. Sync licences are usually negotiated directly with the publisher (for the work) and the label (for the recording).
Chain of title is the documented history of who has owned a right, from its creation through every transfer. It proves that the current owner really holds the rights it claims.
A retention period is the time after a publishing or recording agreement ends during which the publisher or label keeps the rights to works or recordings made under it.
In the US, termination rights let authors and their heirs reclaim certain copyrights decades after transferring them. They can significantly affect what a catalog buyer actually owns.
A CMO, or collecting society, licenses music on behalf of its members, collects royalties from users and distributes them to the rightsholders. PROs, MROs and neighbouring rights societies are all CMOs.
The MLC is the US organization designated to administer blanket mechanical licences for digital services and to pay the resulting royalties to publishers and songwriters.
In Europe, a music licensing company is an organization that grants multi-territory licences for the online use of musical works, such as streaming and downloads, on behalf of publishers and collecting societies. Not to be confused with The MLC in the US.
A neighbouring rights society collects royalties for the public performance and broadcast of sound recordings, on behalf of performers and sound recording rightsholders.
An AV rights society collects and distributes royalties for films, TV series and other audiovisual works on behalf of producers, directors, screenwriters and other authors.
A reciprocal agreement is a contract between collecting societies in different territories to license and collect for each other’s repertoire, so members are paid for use abroad.
CISAC is the international confederation of authors’ societies. It coordinates standards and shared tools for societies that represent songwriters and composers, including the ISWC network.
DDEX (Digital Data Exchange) is the standards body that develops the XML message standards the music industry uses to exchange release, usage, sales and rights data.
An industry trade body represents a group of companies, such as labels or publishers, and often runs shared programmes for data standards, identifiers and market information.
An ISRC is a 12-character code that identifies a specific sound recording or music video. Each recording, and each distinct version of it, should have its own ISRC.
An ISWC is a unique code that identifies a musical work, regardless of how many recordings of it exist. It is assigned through the CISAC network of societies.
An ISNI is a 16-digit identifier for the public identities of people and organizations involved in creative works, such as artists, writers and labels.
A UPC (Universal Product Code) or EAN (European Article Number) is a barcode number that identifies a release, such as an album or single, as a product.
ICPN is the term DDEX uses for a release’s product barcode, which can be either a UPC or an EAN. It identifies the release in DDEX messages such as ERN.
CWR is the standard file format publishers use to register musical works with collecting societies, including writers, publishers and shares. Societies return acknowledgement files showing which registrations were accepted or rejected.
DDEX ERN is the standard message labels and distributors use to deliver release information, such as tracks, artists, artwork and commercial terms, to DSPs and other partners.
DDEX RDR is the standard for exchanging sound recording and rights data between labels, performers and neighbouring rights societies. Its earlier versions were known as DDEX MLC.
A cue sheet lists every piece of music used in a film, TV programme or other production, with its duration, use type and rightsholders. Societies use it to distribute performance royalties.
Publishing income is traditionally split into a writer share, paid to songwriters, and a publisher share, kept by the publisher or shared under a co-publishing deal.
A profit share is a deal where the label and artist split the net profit from a release after agreed costs, instead of the artist receiving a royalty rate.
On a receipts basis, royalties are calculated on what the publisher or label actually receives. On an at-source basis, they are calculated on income where it was first earned, before intermediaries take their fees.
Unmatched income, often called the black box, is royalty money that cannot be paid because the usage could not be matched to a registered work, recording or rightsholder.
A label services deal combines distribution with services such as marketing and promotion, usually with the artist keeping ownership of the recordings.
In a co-publishing deal, the writer and publisher share ownership of the publisher’s share, so the writer earns their writer share plus part of the publisher share.
A direct licence is a licence granted by a label or publisher straight to a music user, instead of through a collecting society. It usually requires the user to report usage of the licensed catalog.
A blanket licence lets a music user use all the repertoire a collecting society or rightsholder controls, for a fee, instead of licensing songs one by one.
A letter of direction is an instruction from an artist to their label to pay part of the artist’s royalties directly to someone else, most often a record producer for their producer points. It is also used to direct neighbouring rights or other income to a third party.
Music metadata is the information that describes a recording or musical work, such as titles, contributors, rightsholders, identifiers, shares and release details. It decides whether rightsholders can be found and paid.
Registration is submitting a musical work or sound recording, with its contributors and shares, to a collecting society or other body so it can be licensed and paid.
Metadata matching is linking a record, such as a usage line or a registration, to the correct work, recording or party in a database, even when identifiers are missing or inconsistent.
Deduplication is finding records that describe the same work, recording or party and merging them into one, so ownership and royalties aren’t split across duplicates.
Metadata enrichment is adding missing information, such as writers, publishers, shares, labels or identifiers, to a record by matching it against reference data.
In matching, a false positive is a wrong match, and a false negative is a correct match that was missed. Both lead to royalties being paid to the wrong party or not paid at all.
Metadata validation is checking data against industry standards and each recipient’s rules before it is delivered, so errors are caught before they cause rejections.
A claim is a rightsholder’s assertion that it owns or controls a share of a work or recording, made to a collecting society, platform or other party so it can be paid.
A counterclaim arises when two or more parties claim the same work and the total claimed shares exceed 100%. Payments are usually held until the parties resolve it.
An overclaim is a situation where the shares claimed on a musical work add up to more than 100%. The MLC and other societies use the term for this kind of conflict.
An ownership conflict is when two parties claim to own the same recording, work or audiovisual asset in the same territory. Societies and video platforms flag these for the parties to resolve.
A music catalog is a collection of musical works, sound recordings, or both, owned or controlled by a label, publisher, artist or investor, together with the rights and income attached to them.
A catalog acquisition is the purchase of a music catalog, usually transferring masters, publishing rights or both, along with the contracts and income attached to them.
In a catalog acquisition, due diligence is the review of agreements, assets, rights and historical revenue that the buyer carries out to assess a catalog’s value and risk before buying it.
In the US, a copyright registration is the public record of a work or sound recording filed with the U.S. Copyright Office. Ownership transfers can also be recorded there.
The series, season and episode hierarchy is how TV works are structured: a series contains seasons, and each season contains episodes. Royalties are usually paid per episode, so usage must be matched to the right level.
A version is a distinct edit of an audiovisual work, such as a theatrical cut, TV edit, director’s cut or dubbed version. Versions can carry different rights and running times.
An AI agent is an AI system that plans and carries out a multi-step task, such as researching a claim, using tools and data sources and reporting its findings.
RAG is a technique in which an AI model retrieves relevant information from an organization’s own data before answering, so its output is grounded in that data.
Evaluations are tests that measure how accurately an AI workflow performs. They can act as quality gates that decide whether a result is accepted automatically or sent for review.