RFC 3161 verification: OK
Authority: http://timestamp.digicert.com
Signed time: 2026-11-11T18:16:25+00:00
Manifest SHA-256: 7a5604fab4addb8b3e5b7f229b3e1be0baf37db7e45f0e80e42242e0744e73cb

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 - 7a 56 04 fa b4 ad db 8b-3e 5b 7f 22 9b 3e 1b e0   zV......>[.".>..
    0010 - ba f3 7d b7 e4 5f 0e 80-e4 22 42 e0 74 4e 73 cb   ..}.._..."B.tNs.
Serial number: 0x0EC4E213764A010038A0BE229B150A7C
Time stamp: Nov 11 18:16:25 2026 GMT
Accuracy: unspecified
Ordering: no
Nonce: 0xD539CC136FF1A1E4
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.