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This detects alteration but is not an independent timestamp or third-party signature.","attestation_hash":"sha256:ea34bb522edc381d0c264787a74b6d86e685e78d2be0e01a24d5af6ab6d62095","attestation_hash_scope":["scheme","artifact_hash","artifact_hash_scope","previous_attestation_hash","methodology_version","calculation_version","issued_at","signature","signature_status","external_timestamp","external_timestamp_status","verification_note"]}},{"publication_id":"hsp_pub_20260901_2092de391039c6d4","as_of":"2026-09-01","published_at":"2026-09-01T21:56:15Z","revision":5,"snapshot_hash":"sha256:2092de391039c6d477493a98b942bdfd7da5ea84e3c6554a45f3cfb0b9442d6d","hash_algorithm":"sha256","commitment_scope":"Canonical JSON of the complete allowlisted agent-facing end-of-day signal projection, sorted by symbol.","data_type":"forward_eod_snapshot_commitment","is_live":false,"scan_schema":59,"engine_version":"scan-schema-59","methodology_version":"ha-methodology-1.0.0","calculation_version":"ha-calc-3239ffdcdb38936e87dc","instrument_count":155,"record_count":155,"previous_publication_id":"hsp_pub_20260901_216ba02ab5754063","attestation_chain_status":"linked","change_counts":{"baseline":0,"added":0,"unavailable":0,"material_change":0,"mark_update":0,"unchanged":155},"source":"https://hesperatlas.com/api/forward-publications","provenance":{"origin":"Hesper Atlas derived output from a completed local end-of-day scan","calculation":"Immutable commitment over the exact subscriber-facing forward signal projection.","update_cadence":"Appended after each completed market-data sweep; duplicate snapshots are ignored.","raw_price_history_included":false,"methodology_version_status":"versioned","provenance_manifest":"https://hesperatlas.com/api/provenance"},"caveats":["The ledger begins when this feature is deployed; it does not fabricate a historical backfill.","A publication is a completed end-of-day snapshot, not real-time or intraday market data.","An unavailable symbol means it was absent from that scan snapshot; it does not by itself prove that the instrument left the tracked universe.","Each new publication freezes both a methodology version and a content-derived calculation version; legacy pre-versioning rows may still contain null.","The hash-chain attestation is first-party integrity evidence, not an independent timestamp or third-party signature."],"attestation":{"scheme":"sha256_hash_chain_v2","artifact_hash":"sha256:9887a242abd54459933649d0e1ca31fcbd332be711641bce197a5c92f5e869c4","artifact_hash_scope":"Canonical JSON of the artifact object before its embedded attestation field is added.","previous_attestation_hash":"sha256:e76da4f1a1b6953ead8643b880eeeea0e83a3cfa2aee3bedd216356e72cc3c4b","methodology_version":"ha-methodology-1.0.0","calculation_version":"ha-calc-3239ffdcdb38936e87dc","issued_at":"2026-09-01T21:56:15Z","signature":null,"signature_status":"not_configured","external_timestamp":null,"external_timestamp_status":"not_configured","verification_note":"Construct the object described by artifact_hash_scope, recompute artifact_hash with the published canonicalization, then recompute attestation_hash over exactly the fields named by attestation_hash_scope. 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