{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:44DXYPYUW72VGJS3K5GSGZLYVK","short_pith_number":"pith:44DXYPYU","canonical_record":{"source":{"id":"2505.20644","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-27T02:45:14Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"6c021c137debd87b383e42c9b2e721ce14d42fb29c870f87935d2dd7d3c6de55","abstract_canon_sha256":"c3cd4126f46ac87b3a91a015d403f08b079175926b28eb1629ebde996ebcf7ec"},"schema_version":"1.0"},"canonical_sha256":"e7077c3f14b7f553265b574d236578aa8597ebfc74e0fd71044bda34031f6923","source":{"kind":"arxiv","id":"2505.20644","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.20644","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"arxiv_version","alias_value":"2505.20644v1","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.20644","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"pith_short_12","alias_value":"44DXYPYUW72V","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"pith_short_16","alias_value":"44DXYPYUW72VGJS3","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"pith_short_8","alias_value":"44DXYPYU","created_at":"2026-07-05T11:10:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:44DXYPYUW72VGJS3K5GSGZLYVK","target":"record","payload":{"canonical_record":{"source":{"id":"2505.20644","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-27T02:45:14Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"6c021c137debd87b383e42c9b2e721ce14d42fb29c870f87935d2dd7d3c6de55","abstract_canon_sha256":"c3cd4126f46ac87b3a91a015d403f08b079175926b28eb1629ebde996ebcf7ec"},"schema_version":"1.0"},"canonical_sha256":"e7077c3f14b7f553265b574d236578aa8597ebfc74e0fd71044bda34031f6923","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:10:16.023267Z","signature_b64":"QZkDe0pRwg4VqSpf7gdSzWS/nnDylie9Sdhz+a5xRCfqeNpFAv4LMbocXVht6E6X+eUJPlX0rvXoKb6tnPrDAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e7077c3f14b7f553265b574d236578aa8597ebfc74e0fd71044bda34031f6923","last_reissued_at":"2026-07-05T11:10:16.022701Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:10:16.022701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.20644","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":"2026-07-05T11:10:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LzDPK9k/88cOoYiFA5moPnKu0MKpq8WGZ94CboGFmP6q8R9M07d6EBp2EvGUED0964xg6OWiMupXH2BIvGRPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T23:43:53.421098Z"},"content_sha256":"2e88d87a8a44d49bfe122f7a2955fe90a5d8cd818d8301dca68a85d427760d73","schema_version":"1.0","event_id":"sha256:2e88d87a8a44d49bfe122f7a2955fe90a5d8cd818d8301dca68a85d427760d73"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:44DXYPYUW72VGJS3K5GSGZLYVK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HCQA-1.5 @ Ego4D EgoSchema Challenge 2025","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.CV","authors_text":"Haoyu Zhang, Liqiang Nie, Meng Liu, Qiaohui Chu, Weili Guan, Yaowei Wang, Yisen Feng","submitted_at":"2025-05-27T02:45:14Z","abstract_excerpt":"In this report, we present the method that achieves third place for Ego4D EgoSchema Challenge in CVPR 2025. To improve the reliability of answer prediction in egocentric video question answering, we propose an effective extension to the previously proposed HCQA framework. Our approach introduces a multi-source aggregation strategy to generate diverse predictions, followed by a confidence-based filtering mechanism that selects high-confidence answers directly. For low-confidence cases, we incorporate a fine-grained reasoning module that performs additional visual and contextual analysis to refi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.20644","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/2505.20644/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":"2026-07-05T11:10:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CV0C3D2quNtZ5N3Ef9VyWMj2dBkYDp/qwiPoajFTTmvwWc8tZxQvffnHb76m70lEyoNZ//iHBII7jG4iQajbBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T23:43:53.422210Z"},"content_sha256":"042b6c32de49da7067f368d49142e0094fb956e19314230aaeda4335e3a70002","schema_version":"1.0","event_id":"sha256:042b6c32de49da7067f368d49142e0094fb956e19314230aaeda4335e3a70002"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/44DXYPYUW72VGJS3K5GSGZLYVK/bundle.json","state_url":"https://pith.science/pith/44DXYPYUW72VGJS3K5GSGZLYVK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/44DXYPYUW72VGJS3K5GSGZLYVK/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":"2026-08-03T23:43:53Z","links":{"resolver":"https://pith.science/pith/44DXYPYUW72VGJS3K5GSGZLYVK","bundle":"https://pith.science/pith/44DXYPYUW72VGJS3K5GSGZLYVK/bundle.json","state":"https://pith.science/pith/44DXYPYUW72VGJS3K5GSGZLYVK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/44DXYPYUW72VGJS3K5GSGZLYVK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:44DXYPYUW72VGJS3K5GSGZLYVK","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":"c3cd4126f46ac87b3a91a015d403f08b079175926b28eb1629ebde996ebcf7ec","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-27T02:45:14Z","title_canon_sha256":"6c021c137debd87b383e42c9b2e721ce14d42fb29c870f87935d2dd7d3c6de55"},"schema_version":"1.0","source":{"id":"2505.20644","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.20644","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"arxiv_version","alias_value":"2505.20644v1","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.20644","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"pith_short_12","alias_value":"44DXYPYUW72V","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"pith_short_16","alias_value":"44DXYPYUW72VGJS3","created_at":"2026-07-05T11:10:16Z"},{"alias_kind":"pith_short_8","alias_value":"44DXYPYU","created_at":"2026-07-05T11:10:16Z"}],"graph_snapshots":[{"event_id":"sha256:042b6c32de49da7067f368d49142e0094fb956e19314230aaeda4335e3a70002","target":"graph","created_at":"2026-07-05T11:10:16Z","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/2505.20644/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this report, we present the method that achieves third place for Ego4D EgoSchema Challenge in CVPR 2025. To improve the reliability of answer prediction in egocentric video question answering, we propose an effective extension to the previously proposed HCQA framework. Our approach introduces a multi-source aggregation strategy to generate diverse predictions, followed by a confidence-based filtering mechanism that selects high-confidence answers directly. For low-confidence cases, we incorporate a fine-grained reasoning module that performs additional visual and contextual analysis to refi","authors_text":"Haoyu Zhang, Liqiang Nie, Meng Liu, Qiaohui Chu, Weili Guan, Yaowei Wang, Yisen Feng","cross_cats":["cs.AI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-27T02:45:14Z","title":"HCQA-1.5 @ Ego4D EgoSchema Challenge 2025"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.20644","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":"sha256:2e88d87a8a44d49bfe122f7a2955fe90a5d8cd818d8301dca68a85d427760d73","target":"record","created_at":"2026-07-05T11:10:16Z","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":"c3cd4126f46ac87b3a91a015d403f08b079175926b28eb1629ebde996ebcf7ec","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-27T02:45:14Z","title_canon_sha256":"6c021c137debd87b383e42c9b2e721ce14d42fb29c870f87935d2dd7d3c6de55"},"schema_version":"1.0","source":{"id":"2505.20644","kind":"arxiv","version":1}},"canonical_sha256":"e7077c3f14b7f553265b574d236578aa8597ebfc74e0fd71044bda34031f6923","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e7077c3f14b7f553265b574d236578aa8597ebfc74e0fd71044bda34031f6923","first_computed_at":"2026-07-05T11:10:16.022701Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:10:16.022701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QZkDe0pRwg4VqSpf7gdSzWS/nnDylie9Sdhz+a5xRCfqeNpFAv4LMbocXVht6E6X+eUJPlX0rvXoKb6tnPrDAA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:10:16.023267Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.20644","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e88d87a8a44d49bfe122f7a2955fe90a5d8cd818d8301dca68a85d427760d73","sha256:042b6c32de49da7067f368d49142e0094fb956e19314230aaeda4335e3a70002"],"state_sha256":"10aa1e207f326222007095f2d9c5c163782ffe3e41cff5351481267d1e36da94"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8KJMUjQzadLyxCXzLh8ORMTojbMjDeWEdOcLGYmoXHWQJ9HBLgeJUtYHG51NQ/Iq4yMXW6RN82W81Gz1Q9LdCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T23:43:53.502855Z","bundle_sha256":"124f3cb326c65847206ab64d27e8b70094afcd2464b70dc425baa24dcd3544fe"}}