Source document library with assurance status
DitchCarbon keeps the source documents behind an organisation's emissions, each with its year and, for Scope 1, Scope 2 and Scope 3, the level of third party assurance the document carries, the assurer and the assurance statement.
Yes, and how far it was assured. Every document is listed with its year and three assurance columns, one per scope. Each cell states the level of assurance (reasonable, limited, unspecified or none), the scope it covers and the assurance provider the document names, with the assurance statement quoted, so you read the evidence rather than a tick.

Provenance is the first thing an auditor asks for and the last thing most systems can produce. Holding the documents themselves, rather than a citation, is what makes a figure checkable, and holding the assurance statement with them is what tells you how much weight the figure will bear.
The per scope assurance columns are the part that changes a conversation. Open any cell and it states the level of assurance the document carries for that scope, reasonable or limited, unspecified where an engagement is named without a level, or none, together with the assurer the document names and the sentence in which the opinion is given. An organisation whose Scope 1 and 2 were assured to a limited level but whose Scope 3 was not is visible as exactly that, rather than flattened into one assured label.
The library holds what organisations actually publish, which includes the same report in several languages, restated versions of the same year, and product level reports with no year attached. All of it is kept rather than deduplicated into a tidier but less complete set.
Every figure carries its source and change history, so the path from a reported total to the document behind it, and to the assurance that document carries, is a link rather than a request.
Common questions
Reasonable assurance is the higher level: the assurer expresses a positive opinion that the information is fairly stated. Limited assurance is narrower: the assurer reports that nothing came to its attention to suggest the information is materially misstated. Unspecified means the document names an assurance engagement without stating the level, and none means no assurance was found.
The documents. Annual reports, CDP questionnaires, assurance statements and product footprints sit together in the library, including the same year restated and the same report in several languages, so a figure can be opened rather than looked up elsewhere.
Yes, and at what level. Each source document carries three assurance columns, one per scope, and each states the level (reasonable, limited, unspecified or none), the scope covered and the assurer named, with the statement quoted. An organisation whose Scope 1 and 2 were assured but whose Scope 3 was not shows as exactly that.
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