Blockchain Land Registry

* Citizen account application with State Authority approval before sign-in. * New-land registration with evidence, consent, Registrar review, Revenue approval, and Fabric commit. * Seller-initiated ownership transfer with repeated owner verification and independent approval. * Governed mutation and correction review across Revenue, Circle, District, and State roles. * Revenue-authorized land-tax assessments and payment records. * Purpose-limited ownership verification, mortgage creation, and mortgage release. * Dispute filing, review, appeal, resolution, and ledger-enforced parcel holds. * Private document storage in local IPFS with CID and SHA-256 integrity references. * Invite-controlled organization onboarding with maker-checker review and lifecycle controls. * Role-based access, jurisdiction checks, audit events, security alerts, idempotency, and projection reconciliation.

The system pairs Hyperledger Fabric as the authoritative store for land titles and ownership history with PostgreSQL for fast search projections and administrative workflow tracking. Sensitive supporting documents and identity evidence remain off-ledger in a private local IPFS instance, referenced via SHA-256 cryptographic hashes for end-to-end integrity. The full stack integrates a Next.js frontend with a FastAPI backend service, delivering independent maker-checker approvals across 10 distinct governance organizations—including Registrars, Revenue Officers, District Officials, and Courts.