Abstract: A system is provided for securely tracking submissions of commodity trades for commodities. The system receives from a price reporter a report on commodity trades between the price reporter and another entity. Each commodity trade includes pricing information and a location of delivery of the commodity. The system generates a hash of the report as evidence of the commodity trades of the report. For each commodity trade of the report, the system maps the location of that commodity trade to an assessment of pricing information such that the commodity trade is to be included in the assessment. The system provides to the price reporter the hash of the report as evidence of the commodity trades. The system provides to the price reporter a listing of the commodity trades of the report for each commodity trade. The listing identifies each assessment that includes that commodity trade.