Retroactive Grant Application: ZAP1 Attestation Protocol and Verification Tooling

Quick ZAP1 implementation update for review clarity.

Since the original retroactive grant post, I tightened the public MCP implementation around the attestation-layer boundary.

ZAP1 is not a wallet MCP, custody layer, signing layer, balance scanner, PCZT signer, or lightwalletd/Zaino sync tool. It is a receipt layer for Zcash workflows.

The current contract is:

observe state
bound the claim
hash the evidence
issue a receipt
verify later

Recent public updates added:

frozen receipt schema: zap1-receipt-v1
example receipt packets
independent receipt verifier
MCP conformance tool: zcash_conformance_check
clear capability manifest for agents

The goal is that a ZAP1-compatible receipt can be checked from the schema, proof material, and Zcash anchor without trusting Frontier’s API or server.

Current live state at time of posting:

29 ZAP1 roots anchored on Zcash mainnet
327 leaves attested
ZIP draft PR #1243 open for review

Reference implementation:

Live stats:

https://api.frontiercompute.cash/stats

ZIP draft:

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