One of the critical advantages of blockchain technology is that it is decentralized and distributed, meaning that no single entity controls the network. This can also make it difficult for authorities to monitor and control the content stored on the blockchain. For instance, if someone were to keep copyrighted material on a blockchain, it would be essentially impossible for copyright holders to remove it as it would be stored across thousands of nodes.
Source: Using Blockchain to Store Illicit or Copyrighted Content