Snocap Inc., the San Francisco-based digital music infrastructure company cofounded by Shawn Fanning, landed $15 million in Series C financing this week.

According to a regulatory filing, the financing came from Court Square Ventures and backers Morgenthaler Partners and WaldenVC.

Snocap is an infrastructure play that is helping at least one major peer-to-peer (P2P) service transition from an illegal file-sharing network to a paid P2P download service. The system is designed to allow a P2P service to pay all copyright holders for songs shared on its network, but lets the service dictate how it charges consumers for the right to use the service.

The company has licensing deals with all four major labels to include their catalog into Snocap's system, and is serving as the infrastructure for Mashboxx, the long-delayed P2P offering from former Grokster chief Wayne Rosso.

"This investment underscores [the investors'] confidence in Snocap as a pivotal trusted solution for expanding the digital media marketplace," Snocap CEO Rusty Rueff said in a statement. "We will leverage this new funding to accelerate the development and marketing of products that will open new doors of distribution for artists and consumers alike."