Endpoint

Task: Prove a whole run of payments settled, one signed receipt per transaction. Returns: Two to twenty signed JSON observations, one per Base transaction hash supplied, each carrying the same fields and independent signature as the single settlement attestation — plus a certificate binding a sha256 digest of the sheaf's evidence hashes, so one verify URL answers for all of them. Instant. Price: $0.05 USDC (x402 v2; network from the current quote). Latency: delivered in the purchase response, same request. Verify: GET /api/verify/{id} — free, unlimited, forever (live sample: cert_4dww28dx5j). Constraints: Give 2 to 20 Base transaction hashes in the tx_hashes query parameter, comma-separated, no duplicates; Each hash is observed once and signed on its own; the bundle is a purchase shape, not a different artifact; Observes settlement only, never delivery; One read per hash at one moment; no polling, no retry, no second look; Per-hash narrowing (payer, recipient, nonce, amount) is the single attestation's feature; the sheaf takes hashes only. A Sheaf of Attestations, Up to 20 settlement attestations in one purchase. Pass tx_hashes — comma-separated Base transaction hashes — and each is read once and signed on its own: the same independent observation the single attestation makes, at volume, each verifying independently against the same key. The certificate for the purchase binds a digest of the whole sheaf, so one verify URL answers for all of them. Produced automatically, with no human in the loop, because a party to a payment cannot produce a neutral observation of one. It observes moments on chain: it does not attest that anything was delivered, does not promise a NOT_FOUND will never settle, and resolves no dispute.

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