RFC 3161 verification: OK
Authority: http://timestamp.digicert.com
Signed time: 2026-11-10T18:16:21+00:00
Manifest SHA-256: c88a87f8cca54de7e8a4845bd37be36df8f4d98c51e378bdba16eeffee7b1475

Status info:
Status: Granted.
Status description: unspecified
Failure info: unspecified

TST info:
Version: 1
Policy OID: 2.16.840.1.114412.7.1
Hash Algorithm: sha256
Message data:
    0000 - c8 8a 87 f8 cc a5 4d e7-e8 a4 84 5b d3 7b e3 6d   ......M....[.{.m
    0010 - f8 f4 d9 8c 51 e3 78 bd-ba 16 ee ff ee 7b 14 75   ....Q.x......{.u
Serial number: 0x57FD294D14D02497CD1DC2DDD870A899
Time stamp: Nov 10 18:16:21 2026 GMT
Accuracy: unspecified
Ordering: no
Nonce: 0xDC17667A62D13CFE
TSA: unspecified
Extensions:

Reproduce with OpenSSL:
openssl ts -verify -data manifest.json -in response.tsr -CAfile authority.pem -untrusted chain.pem

Verify authority.pem against the DigiCert Trusted Root G4 published certificate.
This proves existence no later than the signed time, not authorship, accuracy or original publication date.