{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:D454L7Y576EDJBOQ36NCUWSMJK","short_pith_number":"pith:D454L7Y5","canonical_record":{"source":{"id":"2606.23989","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-06-22T22:39:08Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"2cfab23770ddfe68d05c8437fad406c5cb0be8bd1e989a1d690a10e4e3df7268","abstract_canon_sha256":"161003401c7362ab84006389a0641180a8a0d80a537d2c8e30dfe9eb70195a40"},"schema_version":"1.0"},"canonical_sha256":"1f3bc5ff1dff883485d0df9a2a5a4c4aa44df804a45b9bdfe09cf1e6c5a224b3","source":{"kind":"arxiv","id":"2606.23989","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.23989","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"arxiv_version","alias_value":"2606.23989v1","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.23989","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_12","alias_value":"D454L7Y576ED","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_16","alias_value":"D454L7Y576EDJBOQ","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_8","alias_value":"D454L7Y5","created_at":"2026-06-24T00:14:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:D454L7Y576EDJBOQ36NCUWSMJK","target":"record","payload":{"canonical_record":{"source":{"id":"2606.23989","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-06-22T22:39:08Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"2cfab23770ddfe68d05c8437fad406c5cb0be8bd1e989a1d690a10e4e3df7268","abstract_canon_sha256":"161003401c7362ab84006389a0641180a8a0d80a537d2c8e30dfe9eb70195a40"},"schema_version":"1.0"},"canonical_sha256":"1f3bc5ff1dff883485d0df9a2a5a4c4aa44df804a45b9bdfe09cf1e6c5a224b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-24T00:14:32.396445Z","signature_b64":"T1OWVVQRiTjep2T+ev/t/tmWZPYHsjP53VzeC1XpXohAqq7HL3k9G6s65uubt890nNWmn0EgXEvzpINkNLO0DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f3bc5ff1dff883485d0df9a2a5a4c4aa44df804a45b9bdfe09cf1e6c5a224b3","last_reissued_at":"2026-06-24T00:14:32.396040Z","signature_status":"signed_v1","first_computed_at":"2026-06-24T00:14:32.396040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.23989","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-24T00:14:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ke15SyRB4OjRnDaxqacYBalTEqtsx65wAUIj8BYI2jdmBjRTciaonBzji71goNHTTpK7+6oua8EYdNh67QLeBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T23:20:04.492797Z"},"content_sha256":"b468e607113fe51ba0f60e653033ddc7722c1fe86c531cf7d1fdef6451cd99df","schema_version":"1.0","event_id":"sha256:b468e607113fe51ba0f60e653033ddc7722c1fe86c531cf7d1fdef6451cd99df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:D454L7Y576EDJBOQ36NCUWSMJK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Faithful by Construction: Claim-Anchored Attribution for Multi-Document Summarization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.CL","authors_text":"Shuo Guan","submitted_at":"2026-06-22T22:39:08Z","abstract_excerpt":"End-to-end large language models (LLMs) produce fluent multi-document summaries but remain prone to hallucination, and the attributions they offer are typically coarse (whole documents or passages) and generated post hoc, leaving each summary statement hard to verify. We revisit the modular Extract--Select--Rewrite paradigm and recast its intermediate representation as the unit of attribution. We present CAMS, a Claim-Anchored Multi-document Summarization framework that (i) extracts atomic claims with token-level provenance from every source document, (ii) clusters equivalent claims across doc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.23989","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/2606.23989/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-24T00:14:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HD2oIVQs4R2gJ2pANMuN1H43wRjLqqcUnMQVfa/c3PRORXyyNSrYIWHiyF53pxSqyUsA9y8N0Q+cV9KpstFDCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T23:20:04.493160Z"},"content_sha256":"1fc1ebc8385b5e7b6521df87303900e2338d589c29057715c83aa762ef8ae284","schema_version":"1.0","event_id":"sha256:1fc1ebc8385b5e7b6521df87303900e2338d589c29057715c83aa762ef8ae284"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D454L7Y576EDJBOQ36NCUWSMJK/bundle.json","state_url":"https://pith.science/pith/D454L7Y576EDJBOQ36NCUWSMJK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D454L7Y576EDJBOQ36NCUWSMJK/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-27T23:20:04Z","links":{"resolver":"https://pith.science/pith/D454L7Y576EDJBOQ36NCUWSMJK","bundle":"https://pith.science/pith/D454L7Y576EDJBOQ36NCUWSMJK/bundle.json","state":"https://pith.science/pith/D454L7Y576EDJBOQ36NCUWSMJK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D454L7Y576EDJBOQ36NCUWSMJK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:D454L7Y576EDJBOQ36NCUWSMJK","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"161003401c7362ab84006389a0641180a8a0d80a537d2c8e30dfe9eb70195a40","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-06-22T22:39:08Z","title_canon_sha256":"2cfab23770ddfe68d05c8437fad406c5cb0be8bd1e989a1d690a10e4e3df7268"},"schema_version":"1.0","source":{"id":"2606.23989","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.23989","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"arxiv_version","alias_value":"2606.23989v1","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.23989","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_12","alias_value":"D454L7Y576ED","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_16","alias_value":"D454L7Y576EDJBOQ","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_8","alias_value":"D454L7Y5","created_at":"2026-06-24T00:14:32Z"}],"graph_snapshots":[{"event_id":"sha256:1fc1ebc8385b5e7b6521df87303900e2338d589c29057715c83aa762ef8ae284","target":"graph","created_at":"2026-06-24T00:14:32Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.23989/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"End-to-end large language models (LLMs) produce fluent multi-document summaries but remain prone to hallucination, and the attributions they offer are typically coarse (whole documents or passages) and generated post hoc, leaving each summary statement hard to verify. We revisit the modular Extract--Select--Rewrite paradigm and recast its intermediate representation as the unit of attribution. We present CAMS, a Claim-Anchored Multi-document Summarization framework that (i) extracts atomic claims with token-level provenance from every source document, (ii) clusters equivalent claims across doc","authors_text":"Shuo Guan","cross_cats":["cs.AI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-06-22T22:39:08Z","title":"Faithful by Construction: Claim-Anchored Attribution for Multi-Document Summarization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.23989","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:b468e607113fe51ba0f60e653033ddc7722c1fe86c531cf7d1fdef6451cd99df","target":"record","created_at":"2026-06-24T00:14:32Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"161003401c7362ab84006389a0641180a8a0d80a537d2c8e30dfe9eb70195a40","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-06-22T22:39:08Z","title_canon_sha256":"2cfab23770ddfe68d05c8437fad406c5cb0be8bd1e989a1d690a10e4e3df7268"},"schema_version":"1.0","source":{"id":"2606.23989","kind":"arxiv","version":1}},"canonical_sha256":"1f3bc5ff1dff883485d0df9a2a5a4c4aa44df804a45b9bdfe09cf1e6c5a224b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f3bc5ff1dff883485d0df9a2a5a4c4aa44df804a45b9bdfe09cf1e6c5a224b3","first_computed_at":"2026-06-24T00:14:32.396040Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-24T00:14:32.396040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T1OWVVQRiTjep2T+ev/t/tmWZPYHsjP53VzeC1XpXohAqq7HL3k9G6s65uubt890nNWmn0EgXEvzpINkNLO0DQ==","signature_status":"signed_v1","signed_at":"2026-06-24T00:14:32.396445Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.23989","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b468e607113fe51ba0f60e653033ddc7722c1fe86c531cf7d1fdef6451cd99df","sha256:1fc1ebc8385b5e7b6521df87303900e2338d589c29057715c83aa762ef8ae284"],"state_sha256":"3a70c9f1f5882634c370e6fdaadb9aa8f6bc48c1f1f9284b137b9f84b238f8b5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ls3bKxIbS6QsSyx+vh00wOI0BrdgI7h2ZWyyhJlCpQGkcDCzw1pGF+mPkhvFXQfuJl16CHo3K7cPpISSxwZEDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T23:20:04.495509Z","bundle_sha256":"3ac6f9918bb0f60fb972fbb4518c331c1f5f86a625a3e1ec1ddc1b8cc6fe6aec"}}