Verification
Don't trust the claim. Verify the chain.
The Standard Edition is designed so the customer can inspect a clean example chain and an intentionally tampered chain using the supplied public key and offline verifier.
What is checked
- SHA-256 record hashes
- Ed25519 signatures
- previous-hash continuity
- sequence continuity in the presented chain
- detectable modification of signed records
Expected logic
Clean chain: verification should succeed when all required evidence is present and valid.
Tampered chain: verification should fail when a signed record is modified.
Missing evidence: do not infer a result. Record INCONCLUSIVE or NOT EXECUTED.
Verification status vector
From v1.0.7, the verifier reports a status vector rather than a single VERIFIED result:
record_integrity VALID / INVALID signature_validity VALID / INVALID policy_binding VALID / INVALID signer_authorization VALID / INVALID chain_linkage VALID / INVALID history_completeness NOT_ESTABLISHED checkpoint_freshness NOT_ESTABLISHED anchor_independence NOT_ESTABLISHED external_truth NOT_ESTABLISHED
A checkpoint provides anti-rollback evidence only when it is published to an independently controlled, append-only or otherwise non-rewritable location.
Canonical principles
integrity of record ≠ integrity of interpretation signature validity ≠ attestation validity checkpoint validity ≠ checkpoint freshness operator checkpoint ≠ independent anti-rollback evidence signed claim ≠ externally verified fact
Verify your download
A matching hash confirms you downloaded exactly the file we published. It does not confirm the file is safe. That distinction is what Proof-of-Silence™ is built to teach.
Standard Edition
File: proof-of-silence-v1.0.7-STANDARD.zip SHA-256: 0d1cf92b8dd348df5000759a51431e07aa7996d5fa912dc0e905c4b4bbf33635 Size: 186 985 bytes
Commercial Licence
File: proof-of-silence-v1.0.7-COMMERCIAL.zip SHA-256: 456e532e316adb541b85ca84f0ab57dac54871edbd9df33c6de78f1ebd871b8a Size: 187 727 bytes
How to verify
macOS / Linux: shasum -a 256 proof-of-silence-v1.0.7-STANDARD.zip shasum -a 256 proof-of-silence-v1.0.7-COMMERCIAL.zip Windows: certutil -hashfile proof-of-silence-v1.0.7-STANDARD.zip SHA256 certutil -hashfile proof-of-silence-v1.0.7-COMMERCIAL.zip SHA256
Check the file size first — it takes one second and rules out a truncated download before you run the hash.
Release history
v1.0.7 — 25 August 2026
Protocol: PoS-Standard/1.1 — Implementation: 1.0.7 — Build: 2026-08-25.1
AUTHOR ADVERSARIAL RED TEAM: PASS WITH DISCLOSED MODEL LIMITATIONS
- Attacks attempted: 8
- Successful against v1.0.6: 8/8
- Remediated in v1.0.7: 6
- Model limitations documented: 2 (self-asserted timestamps, operator-controlled checkpoints)
- Regression suite: 122 tests — author-reported
- End-to-end download verification: PASS — Shopify does not repackage the ZIP
INDEPENDENT RED TEAM: PENDING
INDEPENDENT ARTIFACT VERIFICATION: PENDING
v1.0.6 — SUPERSEDED
Status: SUPERSEDED — DO NOT USE FOR NEW DEPLOYMENTS
Reason: semantic-verification weaknesses discovered during author-side adversarial testing.
Affected areas: policy binding, countersignature metadata, key-role separation, key revocation, checkpoint semantics, verification interpretation.
Note: two artifacts were distributed under the label v1.0.6. From v1.0.7, each release is identified by Protocol ID, Implementation version, Build ID, and Artifact SHA-256. The code_hash field in genesis resolves ambiguity for any previously distributed artifact.
Round 4 — 24 August 2026 — v1.0.6
Status: EVIDENCE-BASED CONDITIONAL PASS (superseded by adversarial findings)
SHA-256: 5a6de31a9559be7268a35e73d974a8adb2fe670a1972dd48b4b185fed6f8e02a
OpenAI Build Week 2026
Proof-of-Silence™ has been submitted to OpenAI Build Week 2026. This statement records the submission only; it does not imply selection, endorsement, judging outcome, partnership, or certification by OpenAI.