Po.et is a shared, open, universal ledger designed to record metadata and ownership information for digital creative assets. Po.et is a continuation of Proof of Existence, the first non-financial application of the blockchain. By creating an open platform on the Bitcoin blockchain, Po.et aims to create the most institutional, globally-verifiable record of digital media assets. This record will be a framework for building smart, interoperable media applications using a shared, standard and extensible metadata format. In the same way that blockchain technologies have revolutionized the financial industry by creating an immutable and distributed accounting ledger serving as a platform for financial applications, Po.et will transform the publishing industry by creating an immutable and distributed ledger for creative works that may serve as a platform for both centralized and decentralized media applications.