{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:ZFX6RGLQH25542GMIZF36AADZT","short_pith_number":"pith:ZFX6RGLQ","schema_version":"1.0","canonical_sha256":"c96fe899703ebbde68cc464bbf0003ccfd6b3b4d11611509da3677b8471c1bc6","source":{"kind":"arxiv","id":"2606.23725","version":1},"attestation_state":"computed","paper":{"title":"Computational references are not experiments: pre-registered validation of machine-learned sodium-cathode voltages","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Krishna Teja Vepa","submitted_at":"2026-06-19T07:51:30Z","abstract_excerpt":"Machine-learning screens for battery materials are trained and judged almost entirely against computed reference voltages, and those references carry their own systematic errors. We report a case in which this matters quantitatively: our own screening stack (a graph-network voltage screen, a prior-art triage layer, and a local PBE+U bench) fails pre-registered validation against experiment-anchored literature values. Verdict thresholds, failure modes, and the primary metric were committed before analysis. On an operator-audited set of known Na-ion cathodes (n = 6 after one documented exclusion"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2606.23725","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-19T07:51:30Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"51feb4844cbfa41d9defd2b50f55a3cecac88f3c905d1772216bb6820cda86ec","abstract_canon_sha256":"83ed33027b82fc0dec2eb0137dfe3869062780c30c7ca1f77582b69b97f38c09"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-24T00:14:24.330934Z","signature_b64":"UZybC83H6/YwH0xPlyOoNn6+eOv4zTMMXU3pGHgcKGfHuF+T1hCQeMqG5NpUT7HyapCG+hlLbFhtXmdaz0i0BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c96fe899703ebbde68cc464bbf0003ccfd6b3b4d11611509da3677b8471c1bc6","last_reissued_at":"2026-06-24T00:14:24.330532Z","signature_status":"signed_v1","first_computed_at":"2026-06-24T00:14:24.330532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Computational references are not experiments: pre-registered validation of machine-learned sodium-cathode voltages","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Krishna Teja Vepa","submitted_at":"2026-06-19T07:51:30Z","abstract_excerpt":"Machine-learning screens for battery materials are trained and judged almost entirely against computed reference voltages, and those references carry their own systematic errors. We report a case in which this matters quantitatively: our own screening stack (a graph-network voltage screen, a prior-art triage layer, and a local PBE+U bench) fails pre-registered validation against experiment-anchored literature values. Verdict thresholds, failure modes, and the primary metric were committed before analysis. On an operator-audited set of known Na-ion cathodes (n = 6 after one documented exclusion"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.23725","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.23725/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2606.23725","created_at":"2026-06-24T00:14:24.330596+00:00"},{"alias_kind":"arxiv_version","alias_value":"2606.23725v1","created_at":"2026-06-24T00:14:24.330596+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.23725","created_at":"2026-06-24T00:14:24.330596+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZFX6RGLQH255","created_at":"2026-06-24T00:14:24.330596+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZFX6RGLQH25542GM","created_at":"2026-06-24T00:14:24.330596+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZFX6RGLQ","created_at":"2026-06-24T00:14:24.330596+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT","json":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT.json","graph_json":"https://pith.science/api/pith-number/ZFX6RGLQH25542GMIZF36AADZT/graph.json","events_json":"https://pith.science/api/pith-number/ZFX6RGLQH25542GMIZF36AADZT/events.json","paper":"https://pith.science/paper/ZFX6RGLQ"},"agent_actions":{"view_html":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT","download_json":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT.json","view_paper":"https://pith.science/paper/ZFX6RGLQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2606.23725&json=true","fetch_graph":"https://pith.science/api/pith-number/ZFX6RGLQH25542GMIZF36AADZT/graph.json","fetch_events":"https://pith.science/api/pith-number/ZFX6RGLQH25542GMIZF36AADZT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT/action/storage_attestation","attest_author":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT/action/author_attestation","sign_citation":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT/action/citation_signature","submit_replication":"https://pith.science/pith/ZFX6RGLQH25542GMIZF36AADZT/action/replication_record"}},"created_at":"2026-06-24T00:14:24.330596+00:00","updated_at":"2026-06-24T00:14:24.330596+00:00"}