The MLC: what it collects, and why registering is free money

The Mechanical Licensing Collective is the body created by the Music Modernization Act to administer the blanket mechanical licence for digital services in the United States and to pay the resulting royalties to rights holders.

The mechanism

Digital services pay mechanical royalties into a blanket licence rather than negotiating song by song. The MLC matches usage to registered works and distributes accordingly. Because the statute requires it, the MLC also maintains a public musical-works database that anyone may search or obtain in bulk, which makes ownership data for millions of works a public resource rather than a private asset.

A worked example

A writer whose work is unregistered still generates mechanicals when the song is streamed, but the MLC has nothing to match the usage against, so the money sits unmatched until it is claimed or allocated away.

The database is public because the law says it must be.

What it is confused with

Performing rights organisation A PRO collects PERFORMANCE royalties for the composition. The MLC collects MECHANICAL royalties for the composition. They are different income streams and registering with one does not register you with the other.
Black box royalties Black box is the outcome. The MLC is one of the institutions where that outcome happens, and also the place you go to prevent it.

Why it matters

Registering is free and is the single highest-yield administrative act available to an unsigned writer, because unmatched money is eventually allocated by market share to the largest rights holders rather than held indefinitely for you.

Sources: The MLC · US Copyright Office
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Related: Recoupment · Black box royalties · 360 deal