Aluchin

Introduction to Aluchin

Aluchin is a document verification service that records cryptographic proof-of-existence for digital files on the Hedera Hashgraph public ledger. It enables users to establish an immutable, timestamped record proving that a specific document existed in its exact form at a precise point in time. Designed for individuals and organizations requiring verifiable integrity without blockchain expertise, Aluchin supports common file types—including PDFs, images, and other documents—and requires no cryptocurrency wallet or prior knowledge of distributed ledger technology.

The service targets professionals who need audit-ready, tamper-evident documentation: freelancers resolving payment disputes, small businesses maintaining transaction records, accountants verifying client submissions, and developers integrating verification capabilities into applications. By anchoring only the SHA-256 hash of a file—not the file itself—to the ledger, Aluchin ensures privacy while delivering cryptographic assurance of authenticity and immutability.

Key Takeaways

• Records tamper-proof proof-of-existence on Hedera Hashgraph’s public, permissioned ledger
• Generates a verifiable blockchain timestamp in 3–5 seconds with finality
• Requires no crypto wallet, account, or blockchain knowledge for verification
• Accepts PDF, image, and common file formats (up to 10 MB)
• Stores only the SHA-256 hash on-chain; original files are never retained
• Provides a RESTful API with JSON responses and webhook support
• Offers a free tier using Hedera testnet and paid tiers for permanent mainnet records
• Complies with privacy-first principles: no document storage, no user accounts required for verification

How Aluchin Works

Aluchin operates through a three-step workflow. First, the user uploads a document via the web interface or API. Second, the system computes the SHA-256 hash of the file and submits that hash—along with a consensus timestamp—to Hedera Hashgraph’s network. This transaction is anchored to the public ledger within 3–5 seconds, achieving finality without probabilistic confirmation. Third, Aluchin generates a unique, shareable verification link. Anyone with the original file and the link can independently verify authenticity by re-computing the hash and confirming it matches the on-chain record.

The verification process is fully stateless and does not require authentication: verifiers need only the original file and the public link. The underlying infrastructure leverages Hedera’s aBFT (asynchronous Byzantine Fault Tolerance) consensus, enabling high throughput (10,000 TPS), low cost ($0.0008 per transaction), and enterprise-grade security governed by a council including Google, IBM, and Boeing.

Core Benefits and Applications

Aluchin provides practical value across multiple domains where document integrity and temporal provenance are critical. Freelancers use it to demonstrate invoice existence prior to payment disputes. Small businesses maintain immutable, auditor-ready records for every transaction. Accountants integrate verification into due diligence workflows to confirm client-submitted documents have not been altered. Developers embed the service via a single REST endpoint to add trust layers to accounting software, contract management platforms, or compliance tools.

Pricing is tiered to accommodate varying needs: the Free plan offers 10 testnet verifications per month (non-permanent); Starter ($9/month) and higher tiers provide permanent mainnet records with increasing monthly verification allowances. All plans include full API access, documentation, and verification links that function without user registration.