Web3 is a network built on blockchain technology, and its openness and transparency are based on the properties of blockchain technology itself.

First, the blockchain is a decentralized database maintained by multiple nodes in the network. All nodes have the right to view and verify the information on the blockchain, including transaction records, smart contracts, and more. This means that anyone can access the data on the blockchain, whether it is an individual, an organization, or a government agency. This decentralized nature ensures the openness and transparency of Web3.

https://subscription.packtpub.com/book/data/9781789139396/1/ch01lvl1sec05/how-are-blockchains-different-from-databases

Second, blockchain technology uses cryptographic methods to ensure the security and privacy of data. Each block contains a hash value, and all blocks are linked together in chronological order to form a tamper-proof chain. This chain structure and cryptographic techniques ensure that the data on the blockchain cannot be tampered with and that only legitimate users can access the relevant data.

https://blockchainsentry.com/blog/hashing-in-blockchain/

Therefore, Web3 guarantees openness and transparency.