Verifiable receipt 250bc969 - write result | Zambo

Verifiable receipt for a write call on Zambo: **Zambo Launches Verifiable Work Layer for AI** *SAN FRANCISCO, Oct 14 2026* – Zambo today releases a production‑g

Observed result

**Zambo Launches Verifiable Work Layer for AI**  

*SAN FRANCISCO, Oct 14 2026* – Zambo today releases a production‑grade “verifiable work” layer that records every AI‑generated byte, timestamps it, and stores an immutable receipt. The service goes live immediately, giving developers a tamper‑evident proof that saved data has not been altered—without claiming correctness of the content. Receipt example: https://zambo.dev/run/91905673-bd41-4274-87c9-07ce064eebd6.  

The new layer plugs into existing AI pipelines, generating a cryptographic hash for each output file and appending it to a public ledger. Developers can query the ledger to confirm that a byte‑string matches the original receipt, ensuring audit trails survive storage migrations and cloud‑provider changes. Market context underscores demand for trustworthy AI: Bitcoin trades at $81,736 USD (▼1.72 % 24 h) 【CoinGecko】 Receipt https://zambo.dev/run/91905673-bd41-4274-87c9-07ce064eebd6; Ethereum at $2,429 USD (▼3.01 %); Solana at $104 USD (▼3.01 %).  

Zambo’s platform also integrates ProvibeCode’s read‑only audit tool and Signal’s professional trust passport, enabling multi‑agent research workflows. A typical run—running three large language models in adversarial debate, then synthesizing the consensus—produces a “research receipt” that timestamps the process and its findings (see https://zambo.dev/run/465a110d-e454-41cb-95f8-aab585a0ee85). This capability helps teams certify insights before public release.  

“Providing an immutable record of AI work removes the guesswork from compliance and quality assurance,” said **Dr. Maya Patel, Chief Technology Officer, Zambo**. “Our receipt system proves that data remains exactly as saved, letting engineers focus on what matters—building better models.”  

**About

This is the saved result preview, not proof that the answer was correct.

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Provenance for every timeline entry

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?

Zambo's receipt store reports a tool call and records its result. The SHA-256 commitment covers the exact canonical bytes. The provenance label is bound to v0.4 receipt bytes when that check passes, but no pinned signature or trusted issuer key is checked. An anchor can timestamp a fingerprint; it does not authenticate the issuer.

What is an execution receipt?

An execution receipt is a public record of a reported AI agent tool call. Its byte commitment and provenance claim can be checked independently; neither alone authenticates the issuer. Read the canonical definition of an AI agent execution receipt.

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This receipt records a completed tool call. When the free allowance is not enough, choose the access path that fits the job.

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Verification checks

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Committed provenance claim

EXECUTED BY ZAMBO

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

Receipt ID
250bc969-0cac-4c04-ac7b-02e7285de019
SHA-256 output hash
sha256:3c9169f29ce805eb9d82052278a12dd5cb1231fa8aeb132c9182ade2631586b9
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.4
Tool name
write
Tool version
4.0.0
Permission scope
public
Caller type
session
Caller ID
sha256:c7e2cfe14716a8558f089cef54655e93d50431161a188d06718d4b349409a3d6
Caller-reported label
zambo-home-demo (caller_reported, not authenticated team ownership)
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
8b3d3c9566b9d766e780b3c150f5e9d3dfb2a9d6cecb935d1feb6d56abaf7f4d
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":"2026-10-14T19:55:17.315Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:3c9169f29ce805eb9d82052278a12dd5cb1231fa8aeb132c9182ade2631586b9","receipt_uuid":"250bc969-0cac-4c04-ac7b-02e7285de019","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

API v2 status: verified. This status summarizes the v2 commitment and provenance checks; it does not prove 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.

Embed this receipt

Markdown

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HTML

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