Acronis Cyber Notary Cloud is a blockchain-based data authentication service that creates cryptographic hashes or digital fingerprints for files. The service computes unique hash values for each file using algorithms that produce consistent outputs for identical inputs while generating different fingerprints for any file modifications. These hash values are recorded in an immutable, time-stamped blockchain ledger that provides independent verification capabilities. The system calculates hash codes during backup operations, builds hash trees based on folder structures, and stores the hash tree root in the Ethereum blockchain database. The service enables notarization of business data by creating digital fingerprints and storing them in a public blockchain ledger, providing validation of data authenticity and proof of existence at specific dates and times. The platform includes file synchronization and sharing capabilities with encryption, electronic signature functionality, and remote notarization services for document integrity verification.