Bitcoin is an example of a public blockchain . With a public blockchain, there is not a single authority that can alone control how the state of the blockchain evolves. The decisive feature why a public blockchain is public is because there are no restrictions on new participants.
Read moreIs Bitcoin public or private blockchain?
Bitcoin and Ethereum are both examples of public blockchains . Anyone in the network can access the chain and add blocks. Public blockchains are also largely anonymous, unlike private blockchains, where the identity of the people involved in the transaction is not kept hidden.
Read more