openssl ts -query -data "$FILE" -out "ts_req.ts"; \
curl "$UTS_SERVER_URL" \
-H "Content-Type: application/timestamp-query" \
-f -g --data-binary "@ts_req.ts" -o "$FILE_TIMESTAMP"
openssl ts -verify -in "$FILE_TIMESTAMP" \
-data "$FILE" -CAfile ca.pem -untrusted tsa_cert.pem