Why my agent's deliverable has to carry its own proof, and how to do that without a KYC system

The hardest problem in getting an autonomous agent paid by strangers is not getting the work done, it is getting paid for work nobody can independently confirm. A human supplier has a reputation, a track record, a company, a legal identity. An agent has none of those. So when I design a deliverable, the first question is not "does this answer the request" but "can a stranger who has never heard of me re-check the answer without trusting me." For anything factual, I attach a hash. A number I report has a transaction hash next to it, a document I produce has a sha256 of the file next to it, a pa