ISO/IEC 21000-23 Smart Contracts for Media


This webapp uses the ISO/IEC 21000-23 Smart Contracts for Media APIs (MCO specification and CEL specification).
This demo converts MPEG-21 MCO Contracts to smart contracts in Ethereum and Algorand and MPEG-21 CEL Contracts to smart contracts in Ethereum and Tezos.

Select Technology

Click on CEL for Etehreum and Tezos
Click on MCO for Etehreum and Algorand



Each MPEG-21 CEL/MCO Contract given as input in this demo can be converted into an executable smart contract in three different Distributed Ledger Technologies (DLT), namely Ethereum, Algorand and Tezos. This smart contract, that it is referred to as Smart Contract for Media, holds all the information regarding the MPEG-21 CEL/MCO Contract. This includes a) the revenue percentages of each party involved in the distribution of royalties, b) the DLT addresses representing the parties in the contract and, c) the deontic expressions related to the contract, e.g., permissions, prohibitions or obligations, stored through Non Fungible Tokens (NFTs).

The demo is dvided in two parts: the Forward Conversion and the Backward Conversion.


Forward Conversion
MPEG-21 CEL/MCO Contract to Smart Contract for Media Conversion

For the Forward Conversion from MPEG-21 CEL/MCO Contract to Smart Contract for Media, the first window is used to show the MPEG-21 CEL/MCO template contract selected by using the buttons right above the window. These contract templates are represented in the ISO/IEC 21000-20 (2nd Ed) Contract Expression Language (CEL) using the XML format or in the ISO/IEC 21000-21 (2nd Ed) Media Contract Ontology (MCO) using the RDF (Turtle) format. The templates can be edited through the window.
Once the button "Convert to Media Contractual Objects" is clicked, in the second window the Media Contractual Objects extracted from the MPEG-21 CEL/MCO Contract will be displayed.
In the case of a conversion from an MPEG-21 MCO Contract, a third window will display a Smart Contract Specification generated by clicking the button “Prepare Smart Contract Specification”. The Smart Contract Specification consists of a data structure containing all the information needed as input for the Smart Contract for Media deployment. Below this window, doughnut charts are displayed representing data with respect to the revenue percentages of each party involved in the distribution of royalties (e.g., splits).
Information about the deployment of the Smart Contract for Media in the selected distributed ledger technology is also shown (section 4).



1) MPEG-21 CEL/MCO Contract template selection




2) MPEG-21 CEL/MCO Contract to Media Contractual Objects



3) Media Contractual Objects to Smart Contract Specification


Royalties Distribution


4) Deploy Smart Contract for Media

Ethereum

In the following, the Smart Contract for Media is deployed to the Ethereum Ropsten network by using Metamask.
The NFTs containing the MPEG-21 CEL/MCO Contract clauses are listed in a unique registry found in a smart contract with address 0xAec959Fa5EbF6DCC505643502371e29D93C7a86b of the Ethereum Ropsten test network.
In the following window the Smart Contract Template is displayed. This template is used for the implementation of the Smart Contract for Media. Above this window, the bindings between MPEG-21 CEL/MCO Parties and Ethereum Addresses are also shown and can be edited. Valid addresses in the Ethereum Ropsten test network are required as input.
Finally, the Smart Contract for Media is deployed by clicking the "Deploy Smart Contract" button. During this operation the necessary NFTs are minted. The NFTs’ metadata are stored in IPFS and only the IPFS Content Identifier (e.g., the metadata IPFS hash pointer) is stored on the ledger. As a result of the successful Smart Contract for Media deployment operation its DLT address is returned.

Ethereum

In the following the Smart Contract for Media is deployed to an Ethereum private local network.
The NFTs containing the MPEG-21 CEL/MCO Contract clauses are listed in a newly created registry for each deployment.
In the following window the Smart Contract Template is displayed. This template is used for the implementation of the Smart Contract for Media.

MPEG-21 CEL/MCO Parties and DLT Addresses Bindings

Smart Contract Template


Waiting for deploying contract...
Result:





Backward Conversion
Smart Contract for Media to MPEG-21 CEL/MCO Contract Conversion

In the Backward Conversion from Smart Contract for Media to MPEG-21 CEL/MCO Contract the following two input fields are used to provide the information to retrieve the Smart Contract for Media. In the case of a conversion to an MPEG-21 MCO Contract, a set of Media Contractual Objects obtained from the Smart Contract for Media will be displayed in the first window, after clicking the "Parse Smart Contract for Media".
Finally, in the last window the MPEG-21 CEL/MCO Contract obtained from the Smart Contract for Media after clicking "Convert to MPEG-21 CEL/MCO Contract" is displayed.



1) Smart Contract for Media to Media Contractual Objects




2) Media Contractual Objects to MPEG-21 CEL/MCO Contract