provin

USE CASE 02

Supply chains · data spaces · inter-company APIs

Verify a cross-organization handoff
in the recipient’s environment

Without relying on the sender’s dashboard or database, verify who declared each input, output, and handoff.

What happens

The data passes through three organizations

A supplier registers data, a processing partner transforms it, and a seller receives the result. Each organization runs a separate system and they do not share one logging backend.

At receipt, the seller wants to inspect more than the last sender. It needs to see which organization declared each input and output along the handoff path.

The flow in this scenario

01 Supplier registers the source data Record the input and issuer with a signature 02 Processor verifies what it received Check the predecessor, then issue its result 03 Data moves to the seller Pass the record with the output data 04 Recipient verifies in its environment Check issuer, continuity, input, and output 01 Supplier registers the source data Record the input and issuer with a signature 02 Processor verifies what it received Check the predecessor, then issue its result 03 Data moves to the seller Pass the record with the output data 04 Recipient verifies in its environment Check issuer, continuity, input, and output
Three organizations passing data and signed records in sequence

01 — Where provin fits

Where provin fits

Each organization signs the predecessor and input-output relationship at handoff. The recipient receives that record with the data and verifies the signatures and continuity locally.

02 — What a verifier can check

What a verifier can check

  • Identify which organization issued each segment.
  • Compare the received data with the recorded input and output.
  • Traverse records in the same order as the organizational handoffs.

Public E2E coverage

Public E2E: supplychain confirms signatures and predecessor continuity across registries and handoffs modeled on three organizations.

How to read the evidence

provin supplies evidence for the handoff. Commercial terms and responsibility remain in the existing contract and operating rules.

Place verifiable evidence at the data handoff

provin puts receive, verify, process, sign, and emit in the same data flow. The architecture and specifications describe today’s interfaces and implementation boundary.

View architecture View specifications