Verifiable Calculation Certificates
Verify a receipt
Some CalcFleet results ship with a signed receipt: which formula ran, at which version, on which validated inputs, producing which outputs. Paste one below to check its signature and integrity — no account needed, and there is deliberately no single “verified” stamp.
Every check answers four separate questions — authentic (really signed by the issuer), intact (unchanged since signing), reproducible (re-running the formula matches), and trusted (key and receipt still in good standing right now).
Paste the DSSE envelope (or the full certificate object from an API response). Nothing you paste is stored.
Receipts can also be verified offline, without trusting this page: fetch the issuer keys once from /.well-known/vcc-issuer.jsonand run the open verification steps (DSSE + Ed25519 + RFC 8785) yourself — see the developer docs. A receipt proves integrity and provenance of a calculation; it does not prove the inputs are true, nor that the formula fits any particular purpose, and it is not professional advice or a regulatory certification.