NFTWATCH - an RDF based ontology to describe exhaustively what NFT are, as well as a set of IT tools to interact with it 

The NFT market is booming and is lacking both specialised data vendors and data models to analyse it. The information is spread online, onchain, in multiple marketplaces. NFTWATCH is an open-source project aiming to help the collect and aggregation of all NFT related information.


Motivation for the project:

We will provide a RDF based ontology describing NFT.
We will provide open-source tools to collect, enrich, store, and analyse NFT data coming from multiple offchain and onchain sources.

Generic use case description:

An artist wants to analyse the current NFT trends. What are the collections that sell the best, how to categorise them?
A NFT investor wants to make sure he is buying a legit NFT at the correct price. 

Essential functionalities:

NFTWATCH comes with a data pipeline system, able to collect, store, enrich and query any type of NFT information, organised around a RDF graph.

How these functionalities can be integrated within the software ecosystem:

Reusing the same ontology will enable the ecosystem to create their own data scrappers to feed the same database. Also, the data stored in NFT watch can easily be queried based on the open source and publish RDF graph. 

Gap being addressed:

Getting good quality data on the NFT market. 

Expected benefits achieved with the novel technology building blocks:

We’ll provide the framework enabling the ecosystem to easily collect NFT data and expose it – for whatever use -through API or possibly onchain based oracles.  

Potential demonstration scenario:

An online website initially fed from Opensea data enabling to query NFT data from new data criteria. Eg: show me NFT collections with horses and dogs, how many NFT with animals represented have been sold yesterday, and at what average price.





NFTWATCH  provides an ontology dedicated to NFTs and tools to manipulate usually unstructured (on chain data, transaction history, online marketplaces metadata, semantic data…)  NFT-related data.

Most users will only refer to NFT by data presented by the artists on its website, or by the seller on a marketplace. This raises a first concern: do these data correspond to the advertised token? Does the image displayed really correspond to the NFT? This is further complicated by the fact that NFT marketplaces use very little criteria to classify, search or select NFT.

Through advanced ML and semantic based technology, NFTWatch will analyse and classify not only the structured data provided by the artist, but also unstructured data from different sources, including the piece of art itself. The service will use both the collected and the generated data to propose a multi-facet search and visual discovery of the NFT world. The data will then be available through an application and a REST API.

NFTWATCH will provide NFT buyers with a confidence score based on 4 criteria:

  • Matching criteria (Are the Marketplace and Blockchain data the same ?)

  • Technical criteria (Is the smart contract code secure? Does the code conform to the standard? What is the quality of the code? What is the security of the storage platform?)

  • Authenticity criteria (Is the work attributable to the artist? Is the artwork a copy ? …)

  • Transaction criteria (Is the sales history questionable?)

By creating a complete ontology around NFT data fed by multiple sources associated with online visual data explorer, NFTWATCH is helping the fight against IP fraud.






Currently open to the ONTOCHAIN community only. Reach out if you need access.


More details:

Use case Scenario

NFT investors can use NFTWATCH for searching NFTs of interest using multicriteria (facets) related to the marketplace, on chain data, the art content etc.

After identifying an NFT (through NFTWATCH or directly through a marketplace), the NFT investor can obtain the related confidence score in several ways:

  • Through the demonstrator web application;
  • Automatically through the API (e.g., for batch processing).
Semantic content and content transfer

The produced NFT ontology will be available as an RDF graph.

ONTOCHAIN partners that support the scenario

GRAPHCHAIN: A decentralised graph database such as GraphChain could be used instead of Neo4J. The idea is to become fully decentralised, and to facilitate the creation of decentralized oracles not relying on external sources.

DKG: The DID features proposed by Origintrail could help confirm the authenticity of NFT creators, or the quality of wallets interacting with a given NFT.

iExec: Using the iExec trusted computing tools can help to prove that all calculations and data manipulation rules have been properly implemented.
We see two added values here:

  • Certified operators (e.g., Coexya is ISO 27001) need to prove that their systems are resilient to various types of cyberattacks.

  • In the crypto space, the confidence is by default very low. This is particularly true for the market addressed by NFT Watch, which is aiming to fight against fraud. Thus, bringing additional proof that the system is working without interference, as for example oracles should, is a very good commercial advantage.

NFTSWAP: NFTWatch features could be added to the NFTSwap marketplace, for example, to give a confidence score or a certification trail to all the listed NFTs automatically.




Jean Louis

Jean Louis Vila

PHD in Digital Image Processing. 25 years of professional experience, expert in ECM, ontology, search, data extraction and data exploration projects. Technical Director of Sword France, Sword France Board Member.


Alain Broustail

Alain Broustail

MBA, 20 years of experience in the software and IT consulting industry. Head of Sword Blockchain, co-founder of Tezos Digisign, crypto-investor, blockchain trainer, university teacher. Book writer “Bien utiliser la technologie blockchain en entreprise", at the De Boeck Superieur editions.





Coexya is a French IT consulting and integration provider, specialising in innovative and high tech domain, including smart data and blockchain.