Trying this with your own document or attestation use case? Tell us who you are first — verifying a document (scanning a QR from someone else's) never requires this, only minting your own does.
Input a statement, get back a cover page with a real QR baked in, pointing at a real testnet-verifiable record. This is the "upload time" step — BIS would apply the resulting cover page as page one of the real document.