{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:ZKULB5PC3PGRUEYH5PXFSEKC7O","short_pith_number":"pith:ZKULB5PC","canonical_record":{"source":{"id":"2607.02587","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-01T05:44:48Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"bfd5a26ee473bfb6e03e0f978165ff12b99f836cc42d24763ccfa4bd128ff3df","abstract_canon_sha256":"ec9b92128909e40914d97f755c73bcb35a58a0593868abbd7efe307fe03c77a0"},"schema_version":"1.0"},"canonical_sha256":"caa8b0f5e2dbcd1a1307ebee591142fbbd01f497a9f695ecacb9b468a9d8e5b5","source":{"kind":"arxiv","id":"2607.02587","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.02587","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"arxiv_version","alias_value":"2607.02587v1","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.02587","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"pith_short_12","alias_value":"ZKULB5PC3PGR","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"pith_short_16","alias_value":"ZKULB5PC3PGRUEYH","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"pith_short_8","alias_value":"ZKULB5PC","created_at":"2026-07-07T00:16:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:ZKULB5PC3PGRUEYH5PXFSEKC7O","target":"record","payload":{"canonical_record":{"source":{"id":"2607.02587","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-01T05:44:48Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"bfd5a26ee473bfb6e03e0f978165ff12b99f836cc42d24763ccfa4bd128ff3df","abstract_canon_sha256":"ec9b92128909e40914d97f755c73bcb35a58a0593868abbd7efe307fe03c77a0"},"schema_version":"1.0"},"canonical_sha256":"caa8b0f5e2dbcd1a1307ebee591142fbbd01f497a9f695ecacb9b468a9d8e5b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-07T00:16:01.749790Z","signature_b64":"SdQ2JT1h2pZnlb5pERfvwQaqEL4fDk0tH6LGbwr6WwjSaxe/PqUY+Qlhx/EeHwn2lg40kyqj0f9zNrsfQikMCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"caa8b0f5e2dbcd1a1307ebee591142fbbd01f497a9f695ecacb9b468a9d8e5b5","last_reissued_at":"2026-07-07T00:16:01.749138Z","signature_status":"signed_v1","first_computed_at":"2026-07-07T00:16:01.749138Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.02587","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":"2026-07-07T00:16:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AbXdm2UI+eKKd15tKG1cT+kTi+zwSaR3j/v2m2XTmQR4YbagsuXMeFN1gcvuTeM1EikmI/1swQjt/xpTvChQCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:55:53.733543Z"},"content_sha256":"fba6881e61e5901750a661ced7ee8fa1c05bda68ea4976daa25afbd1b740a8ff","schema_version":"1.0","event_id":"sha256:fba6881e61e5901750a661ced7ee8fa1c05bda68ea4976daa25afbd1b740a8ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:ZKULB5PC3PGRUEYH5PXFSEKC7O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Moving Target: A Longitudinal Audit of Trustworthiness Drift Across Twelve Checkpoints of Open-Source Chat LLMs","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"cs.SE","authors_text":"Xian Sun, Yanhang Li, Yingshuo Wang, Zexin Zhuang, Zhichao Fan","submitted_at":"2026-07-01T05:44:48Z","abstract_excerpt":"Model cards quote trust-benchmark scores without recording when they were measured, and the same number is routinely carried across successive checkpoints of one release line as if the model behind it had not shifted. We test whether it has shifted by auditing four open-source release lines, Yi, Qwen, Mistral, and Gemma, at three successive generations each, on a fixed basket of trust benchmarks under multiple prompt templates. Mean absolute adjacent-generation drift lands well above an independence-based no-drift reference null, and the gap persists when we drop a benchmark, drop a release li"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.02587","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/2607.02587/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":"2026-07-07T00:16:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lIBZvM5PDKVP/2w+szDBcsf/8DZ8HKITDPIwWyDALaPzQWi+OH9BqqFcWQtFp+4NEEPoHm0oSZH71ymsAW7oDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:55:53.733967Z"},"content_sha256":"987ac6a26c7c4091bb4e08ed49875d42d3bca53077606c052f933edee099d69c","schema_version":"1.0","event_id":"sha256:987ac6a26c7c4091bb4e08ed49875d42d3bca53077606c052f933edee099d69c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZKULB5PC3PGRUEYH5PXFSEKC7O/bundle.json","state_url":"https://pith.science/pith/ZKULB5PC3PGRUEYH5PXFSEKC7O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZKULB5PC3PGRUEYH5PXFSEKC7O/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":"2026-08-05T14:55:53Z","links":{"resolver":"https://pith.science/pith/ZKULB5PC3PGRUEYH5PXFSEKC7O","bundle":"https://pith.science/pith/ZKULB5PC3PGRUEYH5PXFSEKC7O/bundle.json","state":"https://pith.science/pith/ZKULB5PC3PGRUEYH5PXFSEKC7O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZKULB5PC3PGRUEYH5PXFSEKC7O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:ZKULB5PC3PGRUEYH5PXFSEKC7O","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":"ec9b92128909e40914d97f755c73bcb35a58a0593868abbd7efe307fe03c77a0","cross_cats_sorted":["cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-01T05:44:48Z","title_canon_sha256":"bfd5a26ee473bfb6e03e0f978165ff12b99f836cc42d24763ccfa4bd128ff3df"},"schema_version":"1.0","source":{"id":"2607.02587","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.02587","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"arxiv_version","alias_value":"2607.02587v1","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.02587","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"pith_short_12","alias_value":"ZKULB5PC3PGR","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"pith_short_16","alias_value":"ZKULB5PC3PGRUEYH","created_at":"2026-07-07T00:16:01Z"},{"alias_kind":"pith_short_8","alias_value":"ZKULB5PC","created_at":"2026-07-07T00:16:01Z"}],"graph_snapshots":[{"event_id":"sha256:987ac6a26c7c4091bb4e08ed49875d42d3bca53077606c052f933edee099d69c","target":"graph","created_at":"2026-07-07T00:16:01Z","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/2607.02587/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Model cards quote trust-benchmark scores without recording when they were measured, and the same number is routinely carried across successive checkpoints of one release line as if the model behind it had not shifted. We test whether it has shifted by auditing four open-source release lines, Yi, Qwen, Mistral, and Gemma, at three successive generations each, on a fixed basket of trust benchmarks under multiple prompt templates. Mean absolute adjacent-generation drift lands well above an independence-based no-drift reference null, and the gap persists when we drop a benchmark, drop a release li","authors_text":"Xian Sun, Yanhang Li, Yingshuo Wang, Zexin Zhuang, Zhichao Fan","cross_cats":["cs.LG"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-01T05:44:48Z","title":"The Moving Target: A Longitudinal Audit of Trustworthiness Drift Across Twelve Checkpoints of Open-Source Chat LLMs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.02587","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:fba6881e61e5901750a661ced7ee8fa1c05bda68ea4976daa25afbd1b740a8ff","target":"record","created_at":"2026-07-07T00:16:01Z","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":"ec9b92128909e40914d97f755c73bcb35a58a0593868abbd7efe307fe03c77a0","cross_cats_sorted":["cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SE","submitted_at":"2026-07-01T05:44:48Z","title_canon_sha256":"bfd5a26ee473bfb6e03e0f978165ff12b99f836cc42d24763ccfa4bd128ff3df"},"schema_version":"1.0","source":{"id":"2607.02587","kind":"arxiv","version":1}},"canonical_sha256":"caa8b0f5e2dbcd1a1307ebee591142fbbd01f497a9f695ecacb9b468a9d8e5b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"caa8b0f5e2dbcd1a1307ebee591142fbbd01f497a9f695ecacb9b468a9d8e5b5","first_computed_at":"2026-07-07T00:16:01.749138Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-07T00:16:01.749138Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SdQ2JT1h2pZnlb5pERfvwQaqEL4fDk0tH6LGbwr6WwjSaxe/PqUY+Qlhx/EeHwn2lg40kyqj0f9zNrsfQikMCA==","signature_status":"signed_v1","signed_at":"2026-07-07T00:16:01.749790Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.02587","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fba6881e61e5901750a661ced7ee8fa1c05bda68ea4976daa25afbd1b740a8ff","sha256:987ac6a26c7c4091bb4e08ed49875d42d3bca53077606c052f933edee099d69c"],"state_sha256":"4fa03760f620e7f4efe1db18a04671cdd7b97ccd29a28f499f1387039f7ecafa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+FJoB6O1iqEYSoqfKcV6FsakX3ODO6VXLSKyH+AsvjKiJtiIVVR6fntTeTdhDuskKsaFH5xdOyyJVhZL5cpvBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T14:55:53.737737Z","bundle_sha256":"468a81b6de818c6c415de07bc3d71e17137f08be44cadc11294c6731878a5069"}}