US Patent 11212347 Private content storage with public blockchain metadata

This specification relates to methods and systems for content management. One of the methods includes: receiving data identifying a user; verifying that the user is an authorized user; receiving initial content from the authorized user; encrypting the initial content using an encryption key to produce encrypted content; forwarding the encrypted content for storage; creating content storage metadata; encrypting the content storage metadata to provide encrypted content storage metadata; and forwarding the encrypted content storage metadata to a blockchain such as a public ledger.