Problem statement
Physical and digital evidence passes through many hands — police, forensic teams, courts, legal professionals. Each handoff is a point where the chain of custody can break. The platform records every transition on a distributed ledger so the record is tamper-resistant and auditable.
Approach
- Digital evidence is hashed; the hash is committed on-chain while the payload stays in secure off-chain storage.
- Each custody transfer is a signed, timestamped transaction.
- Stakeholder roles (police, forensics, courts, legal) gate what each party can do.
Lessons learned
The hard problems were not cryptographic — they were procedural. Mapping real-world custody workflows onto an append-only ledger required close work with domain experts to model exactly which events matter and who is authorized to record them.