Proof of pedigree is a document that provides evidence of a person's ancestry. It is often used to prove the legitimacy of a claim to a title or other hereditary privilege. The term 'proof of pedigree' can also refer to documents that provide evidence of a person's family tree, such as birth certificates, marriage certificates, and death certificates. The crossword solution for this term is 'PAPERS, ' which refers to the documents that are used to provide proof of pedigree.