Major technology companies such as Microsoft, Alphabet, Amazon, Apple and Meta are actively investing in the development of artificial intelligence (AI). The total capitalization of these companies is approaching $10 trillion, which is more than a quarter of the capitalization of the S&P 500 index. These companies control huge volumes of digital data, based on which AI models are trained. However, there is a risk of monopolization and misuse of data, which can have a negative impact on society. In this regard, the relevance of decentralized data management systems based on blockchain, which can provide control over data at the user level and prevent monopolization of information, is growing.