Build an immutable evidence chain of custody network where every handling event is time-stamped and multi-party verified. Cerulea Studio assembles it from Evidence Chain, Device Attestation, and DID and VC Ledger, so custody challenges are resolved with cryptographic evidence and a complete on-chain record survives cross-examination in court.
Turn a paper custody log into a time-stamped, multi-party-verified chain that withstands tampering challenges.
01.
Anchor at seizure. The Evidence Chain module registers each item at collection with its case, location, and collecting officer, fixing the genesis of an unbroken custody record.
02.
Verify each transfer. A custody change requires both the releasing and receiving handler to sign, so no gap can appear in the chain from a single unilateral log entry.
03.
Prove exact timing. Every handling event is time-stamped on-chain, so the sequence and duration of custody are provable rather than reconstructed from a register.
04.
Bind to credentials. The DID and VC Ledger ties each action to a credentialed handler, so who touched an item and when is cryptographically attributable.
05.
Detect tampering. Device Attestation seals evidence images and hashes, so any alteration of a digital exhibit breaks its seal and is provably detectable.
06.
Answer challenges with proof. When a defense challenges integrity, the complete on-chain custody record with timestamps and signatures is presented, resolving the challenge on evidence.
Follow a single exhibit from seizure through multi-party custody transfers to a court challenge resolved on record.
22:14:11
[SYS] Registering seized evidence...
22:14:11
[CMD] seize { case: "CR_7742", item: "EX_881", officer: "OFF_0x21" }
22:14:12
[AUTH] Verifying collecting officer credential...
22:14:12
[OK] Evidence anchored at block 7112233.
Cerulea decomposes evidence custody into modular contracts. Each layer registers, transfers, seals, and presents without any handler able to alter the record after the fact.
Immutable chain of custody is a horizontal capability. Here is how different justice actors put the evidence ledger to work.
Register and transfer evidence on a co-signed, time-stamped chain, so custody gaps that lead to acquittals cannot open from a single unverified log entry.
Key Asset Types
Seal exhibit images by hash and co-sign every handoff, so lab handling is tamper-evident and defensible when challenged in court.
Key Asset Types
Answer tampering challenges with a complete cryptographic custody record, resolving integrity disputes on evidence instead of contested testimony.
Key Asset Types
Whether you are bridging a legacy evidence management system or capturing handoffs from officer devices, Cerulea routes both into one immutable custody ledger.
For police and forensic evidence management systems. Seizure and transfer events are translated into co-signed on-chain custody records through the API gateway automatically.
Evidence Management System
Police & FSL Systems
Cerulea API Gateway
Event Hashing & Signing
Cerulea Private Chain
Evidence Custody Ledger
For officers and lab staff on devices. A credentialed device co-signs each seizure and handoff at the point of custody and routes it directly to the ledger.
Officer / Lab Device
Credentialed Handlers
Consortium Validators
Custody Consensus
Cerulea Ledger
Immutable Custody Record
Building an evidence custody network with multi-party handoffs, integrity sealing, and courtroom-grade presentation from scratch requires specialised engineers and long integration cycles. Calculate your exact deployment speed using Cerulea.
Traditional Deployment
Solidity Coding & Audits
~ 13 Months
Visual Compilation
WASM Logical Artifacts
~ 4 Weeks
The legacy timeline reflects law-enforcement evidence integration benchmarks. Wiring evidence systems, building co-signed custody logic, and shipping courtroom-grade presentation for an average network takes a baseline of 8 months. Building the same architecture on Cerulea takes a baseline of 2 weeks, because Cerulea Studio visually translates your custody and integrity rules into pre-audited WebAssembly binaries and provisions the shared custody ledger instantly.