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Customer

The customer already had a Claim Audit Management System used to manage claims, supporting documents, audit activities, approvals, and audit history. The requirement was to enhance the existing platform with blockchain technology to provide an additional layer of trust, document verification, and tamper-evident audit tracking. The existing application and database continued to manage the business data, while blockchain was introduced specifically for recording and verifying important claim audit activities.

Some of the key blockchain challenges were:
  • Existing audit records were maintained only in the centralized application database, making independent verification difficult.
  • There was a need to verify that important claim documents had not been modified after they were submitted or audited.
  • Critical audit activities such as approval and rejection needed a tamper-evident record.
  • Sensitive claim and customer information could not be stored directly on the blockchain.
  • The blockchain solution needed to work with the existing Claim Audit Management System without replacing the current database and business workflow.
  • Blockchain transaction failures or network issues needed to be handled without affecting the normal claim audit process.
Solutions 
  • Implemented a blockchain integration layer with the existing Claim Audit Management System using Web3.js.
  • Created a Solidity smart contract to record important claim audit events.
  • Generated a unique SHA-256 hash for claim documents and stored the hash on the blockchain instead of storing the actual document.
  • Recorded important blockchain events such as claim submission, document submission, audit completion, approval, and rejection.
  • Added blockchain transaction tracking to maintain the transaction ID and confirmation status for each recorded event.
  • Implemented document verification by comparing the current document hash with the hash stored on the blockchain.
  • Kept sensitive claim, customer, and document information in the existing database and secure storage.
  • Added retry and error-handling mechanisms for failed blockchain transactions.
  • Added blockchain verification functionality so authorized users can confirm the authenticity of documents and audit events.
  • Integrated blockchain events with the existing audit workflow without changing the core claim management process.
Results
  • Added a tamper-evident blockchain audit layer to the existing Claim Audit Management System.
  • Enabled verification of important claim documents using blockchain-recorded hashes.
  • Provided an additional level of trust for critical audit activities such as approvals and rejections.
  • Made important audit events independently verifiable through blockchain transaction records.
  • Reduced the risk of unnoticed document modification after submission.
  • Maintained data privacy by keeping sensitive claim information outside the blockchain.
  • Successfully integrated Web3 functionality with the existing enterprise application without requiring a complete system rewrite.
  • Created a foundation for future blockchain-based audit, compliance, and verification capabilities.
Technologies
  • Blockchain: Ethereum
  • Smart Contract: Solidity
  • Blockchain Integration: Web3.js
  • Backend: .NET Core Web API, C#
  • Database: SQL Server
  • Document Storage: AWS S3
  • Security: JWT, Role-Based Access Control
  • Hashing: SHA-256
  • Logging: Serilog
  • API Integration: REST API
  • Development & Deployment: Git, GitHub Actions, Docker
  • Blockchain Development: Hardhat
Timeline: 6 Weeks
  • Blockchain Architecture & Design: 1 week
  • Smart Contract Development: 1 weeks
  • Document Hashing & Verification: 1 weeks
  • Web3.js Integration & Claim Audit Events: 1 weeks
  • Blockchain Transaction Handling & Verification UI: 1 weeks
  • Testing, Security & Production Deployment: 1 weeks

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