Our system uses cryptographic hashing to verify documents without storing the actual content on the blockchain. Here's how it works: 1) Hashing: We create a unique digital fingerprint (hash) of your document using algorithms like SHA-256, 2) Recording: This hash is stored on the blockchain with a timestamp, 3) Verification: To verify a document, we hash the current version and compare it to the blockchain record. If they match, the document is unchanged since it was recorded. This approach maintains document privacy while providing tamper-proof verification. The original document never leaves your control, and the blockchain only contains the irreversible hash, not the content itself.

Our system can verify virtually any type of digital document: 1) Text documents: Contracts, agreements, certificates, diplomas, 2) Images: Photos, scans, digital artwork, 3) PDFs: Reports, forms, documentation, 4) Audio/video files: Recordings, media content, 5) Data files: Spreadsheets, databases, logs, 6) Code repositories: Software code, scripts, and 7) Digital assets: NFTs, digital creations. The system works with any file type because it hashes the binary content. For physical documents, you can verify scanned copies or photos of the physical item. There's no practical size limit, though very large files may require more processing time for hashing.

Wallet-based signing adds crucial authentication to document verification: 1) Identity proof: Links the document to a specific blockchain wallet address, proving who created the verification record, 2) Non-repudiation: The signer cannot later deny having verified the document, as the signature is cryptographically tied to their wallet, 3) Timestamp authority: Combines the blockchain timestamp with personal authentication, 4) Multi-party signing: Multiple parties can sign the same document verification, creating a comprehensive audit trail, 5) Selective disclosure: You can choose to reveal only your signature without disclosing other identifying information, and 6) Interoperability: Works with standard blockchain wallets that people may already use for other purposes. This approach is often more secure than traditional digital signatures because it leverages proven blockchain cryptography.

Blockchain verification is increasingly gaining legal recognition: 1) EU regulations: The eIDAS regulation recognizes advanced electronic signatures including those based on blockchain, 2) US acceptance: ESIGN Act and UETA provide legal framework for electronic signatures, with courts increasingly accepting blockchain evidence, 3) International standards: ISO is developing standards for blockchain-based trust services, 4) Case law: Multiple court cases have accepted blockchain evidence as valid proof, 5) Industry acceptance: Many industries now accept blockchain verification for documents like diplomas, certificates, and contracts, and 6) Notarization alternative: In many jurisdictions, blockchain timestamping is accepted as equivalent to notarization for proof of existence. While acceptance varies by jurisdiction and use case, the trend is strongly toward broader legal recognition of blockchain-based verification.

Blockchain verification records are maintained essentially permanently: 1) Immutability: Once recorded on a blockchain, data cannot be altered or deleted, 2) Network persistence: Blockchain networks are designed to maintain complete history indefinitely, 3) Redundancy: Data is replicated across thousands of nodes worldwide, ensuring preservation, 4) Long-term accessibility: Even if our service ceased operations, the verification records would remain on the blockchain and could be verified using standard tools, 5) Forward compatibility: The cryptographic hashing approach ensures future verifiability even as technology evolves, and 6) Archive integration: For added preservation, records can be integrated with digital archive systems. This permanence makes blockchain verification ideal for documents that need to be verified years or even decades into the future.