Handover submission · saved and checkable

Provenance for every timeline entry

• EXECUTED BY ZAMBOZambo ran the tool call itself.
• OBSERVED VIA GATEWAYA Zambo gateway observed request and response bytes from the named external executor. Zambo did not run that external action.
• LOGGED BY AGENTAn agent or local hook reported the action. Zambo attests that the record is unchanged since logging, not that the action happened as described.

Private agent reasoning, built-in client actions, and direct calls to unrelated MCP servers are not included unless an agent or gateway reports them.

What is this receipt?

This is a verifiable receipt for a journal entry. It confirms receipt, redaction, timestamping, and chaining. It does not attest to execution.

What is this?

Zambo's receipt store reports a journal entry from an agent or local hook. The SHA-256 commitment covers the receipt bytes. The provenance label is only a claim, not proof of issuer identity or that the reported action happened.

Verification checks

• SHA-256 commitment: Checked independently against the exact decoded bytes
• Provenance binding: PASS; The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.
• Metadata binding: PASS; metadata_hash matches the canonical metadata block.
• Issuer authentication: NOT CHECKED; no pinned signing key or trusted issuer was supplied
• Signature: NOT CHECKED; no Ed25519 signature or pinned key is supplied
• Chain: NOT CHECKED; no append-only chain proof is validated
• Stored timestamp: 2026-10-29T22:06:42.895Z; external immutability is not checked

Committed provenance claim

LOGGED BY AGENT

The metadata claim is consistent with the verified receipt bytes; issuer is not authenticated.

Receipt ID

b26105bc-988f-420e-8582-e29801d94f71

SHA-256 output hash

sha256:278c461eb6dc4e3aa1d633aa429849dd02ea7d5691e6948b1e85660b092518b4

Canonical bytes

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

Timestamp

2026-10-29T22:06:42.895Z

Bound call context

Receipt schema

0.4

Tool name

handover_submission

Tool version

4.0.0

Permission scope

public

Caller type

session

Caller ID

sha256:7339c1d3d8d2236b907f0b8387bc0e3bb738892c0a757c5e557b9c64143ebb78

Declared side effects

none

Side-effects schema

zambo-side-effects/1

Declaration hash

sha256:45aad38f3aa982b9aafe92ecb416ebe98791eddbaf8ab6df0bd08605b7c1bfee

This records what the server-side tool contract declared at call time. It does not independently verify that a downstream side effect happened.

Bound upstream evidence

Status

no_upstream_bytes_captured

Evidence SHA-256

unavailable

Byte length

unavailable

Neutral Nostr anchor

Event ID

006ab7e6bfd677d87ac75cb169ad6c3d84db914190883563064552a88878ada7

Anchor status

partial

Public key

e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

Relay hints: wss://relay.damus.io · wss://nos.lol · wss://relay.primal.net

Schema: zambo-receipt-anchor/1

Anchor envelope bytes:

{"anchored_at":"2026-10-29T22:06:42.895Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:278c461eb6dc4e3aa1d633aa429849dd02ea7d5691e6948b1e85660b092518b4","receipt_uuid":"b26105bc-988f-420e-8582-e29801d94f71","schema_version":"zambo-receipt-anchor/1"}

Anchor status "partial": Published to some configured relay targets; publication was not confirmed by every configured relay.

Check this hash yourself

Receipt commitment: commitment matched; issuer, signature and chain not checked. This checks the saved bytes, not whether the answer was correct. Recompute the SHA-256 commitment in your browser. Open the API v2 JSON response to inspect the machine-readable checks. See the Nostr anchor event on a public viewer. The fingerprint is timestamped outside Zambo too.