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Issued and signed by Codexa Technology Ltd on 13 October 2026 at 06:19 UTC.

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Communiqué · CDX-2026-000002-38MK

Test Demo

Demo Communique

Document date: 13 October 2026

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Signature details

Status: Authentic
Entity: Codexa Technology Ltd
Reference: CDX-2026-000002-38MK
Issued: 13 Oct 2026, 10:19
Algorithm: Ed25519 / SHA-256
Key ID: 7E6A855D554C270E
Content SHA-256: 2a752a656cbe3a8ade5bf0a82faae385fd42b6128c0e2dcbcd58383e43b3093b
PDF SHA-256: 50452fdb7ae5fe8caba2d496effab5897885500d81bd3fe08ef9f0a846a6a107
Signature: fJQSLCQVcjjIIwAZCtmHXEdxOZbzVeKnG8hNJiTnZxbVVJKkG0kzge23PxYpGBtzs32uUvWB4ODjLMheNFZQBw==
Chain: #2 · previous 8b7c8c18ffaea410…

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Download proof.json and the public key, then:

jq -r .canonical_json proof.json | tr -d '\n' > c.json
sha256sum c.json   # must equal content_sha256
jq -r .signature_base64 proof.json | base64 -d > sig.bin
openssl pkeyutl -verify -pubin -inkey codexa-7E6A855D554C270E.pem \
  -rawin -in c.json -sigfile sig.bin

Public key (raw, base64): zV5Vp/Zbh5xe/Up/00ZtpZnPks/wL+vgvJnN6Y2o+cs=