This document describes a technique for storing and retrieving audience lists in a distributed manner by using a blockchain. Script executed by a user device can generate a pair of public and private keys for a user. The user can sign a message containing the public key and other information using the private key and upload the message to a blockchain corresponding to an audience list. A data processing system can search the blockchain for the public key and utilizing the information in the audience list maintained using the blockchain to better serve the user.
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Pattison, David, "Distributed Audience Lists", Technical Disclosure Commons, (November 26, 2016)