Where Our Data Comes From

Every number comes from one of these source types, in strict order of preference. We always use the highest-ranked available source.

156 companies across up to 6 years of data means reading hundreds of primary source documents. Each document is a PDF annual report, SEC filing, or exchange announcement ranging from 20 to over 300 pages. The relevant operational data is typically found in production summary tables, operational review sections, and financial highlights.

For each document, we identify the correct tables, extract the values we track, verify the units, check for definition changes, and record the proof fields (URL, page, verbatim quote). This process is repeated for every company, every year, across all 7 exchanges.

Mining company annual reports are complex documents. A typical gold miner's annual report includes mine-by-mine breakdowns, multiple cost definitions, multiple currencies, and production data split between equity and consolidated bases.

Our extraction process for each company follows a consistent pattern:

Most data services cite a number. They tell you the value and maybe the company it came from. ProveMines sources every number: the exact document, the exact page, the exact text.

This distinction matters because errors compound. If a data aggregator misreads a number from a news article that misquoted an annual report, the error is invisible. There is no way to trace it back. With ProveMines, you can follow the URL to the PDF, turn to page 47, and find the exact sentence. If we got it wrong, you will know immediately.

This is what “every number sourced” means. Not referenced. Not attributed. Sourced — with a verifiable chain from the number in our database to the text on the page of the original filing.