A method and system for sophisticated consumer deep profile building provided as a service in a certifiably clean, i.e., privacy-safe, manner to advertisers, ad networks, publishers, aggregators and service providers. In an embodiment, an entity provides a tracking and targeting service that acts as a container for sensitive consumer information. The entity preferably implements a stringent policy of transparency and disclosure, deploys sophisticated security and data anonymization technologies, and it offers a simple, centralized consumer service for privacy disclosure, review and deletion of collected profile information, opt-in, opt-out, and the like. In exchange, advertisers, ad networks, publishers, aggregators and service providers (including, without limitation, mobile operators, multiple service providers (MSPs), Internet service providers (ISPs), and the like), receive privacy-safe targeting services without ever having to touch sensitive information.