Legacy used-car data landscape (fragmented silos)

Paper / Email / CSV exports (not tamper-evident)

Proposed permissioned blockchain architecture

Off-chain Document Store (service PDFs, claims) with hashes anchored on-chain

Permissioned Ledger Network (on-chain: event hashes, VIN, type, ts, issuer DID)

Sale-time disclosure & verification sequence

Ledger: minimal event data + hashes (tamper-evident)

On-chain minimal data & off-chain documents

LifecycleEvent {type, ts, issuerDID, hash}

ProofPackage (ZK attestations)

Off-chain docs: service reports, claims, RWC PDFs (integrity via hash)

assignment2