RFC 3161 verification: OK
Authority: http://timestamp.digicert.com
Signed time: 2026-11-12T01:16:18+00:00
Manifest SHA-256: 8b9524dbc404d7903ad1b829c0d83bcf1f316f2f88a4089c2532bf794f57426f

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 - 8b 95 24 db c4 04 d7 90-3a d1 b8 29 c0 d8 3b cf   ..$.....:..)..;.
    0010 - 1f 31 6f 2f 88 a4 08 9c-25 32 bf 79 4f 57 42 6f   .1o/....%2.yOWBo
Serial number: 0x99C9A4B8585C7941B0B14B2CCC3BB032
Time stamp: Nov 12 01:16:18 2026 GMT
Accuracy: unspecified
Ordering: no
Nonce: 0xF52CDF627CAF1DBF
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.