A settled public sample

Valid signature.
Closed window. STOP.

A local clock and a chat log do not travel as proof. This packet binds the same 228 bytes to a signed witness interval. The holder compares that interval with the task window and decides.

Time-window instrument

One packet / two intervals

30 AUG 2026execution

31 AUG 2026witness

20:00Z

5 minutes

20:05Z

05:02:06Z

20 seconds

05:02:26Z

Schedule bytes228

Signaturechecking

Window overlapfalse

Local policySTOP

The signature proves origin and integrity. It does not grant permission, schedule work, or perform the action.

Digest control

One flipped byte.
Hash breaks.

Change offset 226 in the exact schedule. The signed receipt stays untouched. Verification must fail closed.

Offset226

Original0x7d }

Changed0x7c |

Expected error witness_payload_digest_does_not_match_expected Run the control to compare the mutated bytes.

Two skins / one packet

Read it or run it.

Humans

Open the JSON.
Compare execution_window_utc to witness_window_utc.
Change one character in the schedule bytes.

Agents

Load the packet. Verify signature and digest.
Apply the witness window to the execution window.
Emit stop or proceed from evaluation-outcomes.json.
Mutate byte 226 and verify again.

Do not request a paid anchor.