A blockchain of transactions may be referenced for various purposes and may be later accessed by interested parties for ledger verification. One example method of operation may comprise one or more of identifying shipment locations for a product shipment, storing the shipment locations in a local blockchain, transmitting the shipment locations to a remote blockchain, comparing the shipment locations of the remote blockchain with the shipment locations stored in the local blockchain, and verifying the shipment locations of the remote blockchain are consistent with the shipment locations stored in the local blockchain.