Techniques are disclosed for securely managing data. In one example, a service provider receives user image data and user biometric data associated with a user. The service provider generates a user profile cryptographic key based on hashing this data, which may be associated with a user identifier. The service provider may further generate a public/private key pair associated with the user identifier. The public key and the user profile cryptographic key are stored, in association with the user identifier, to a consortium blockchain network. The service provider then receives a request, signed with the private key, to store a document in association with the user identifier. The service provider generates a document cryptographic key of the document, and executes a request to store the document cryptographic key to the blockchain in association with the user profile cryptographic key, the request verified using the public key.
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