{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:3ND2R5QFBVRZJSX3P7FS2MND4H","short_pith_number":"pith:3ND2R5QF","canonical_record":{"source":{"id":"2004.10706","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DL","submitted_at":"2020-04-22T17:10:18Z","cross_cats_sorted":["cs.CL"],"title_canon_sha256":"a654231bbc9d290d0e9e5d9bbef5db633b818ae2d7c49133f8138f710e65c615","abstract_canon_sha256":"b0ef2c0bbdbf65502a5d303efa428c58642b13294534af29ab25ec5f4a84f366"},"schema_version":"1.0"},"canonical_sha256":"db47a8f6050d6394cafb7fcb2d31a3e1d44b60065d28c6843e72dde0501c666e","source":{"kind":"arxiv","id":"2004.10706","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.10706","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"arxiv_version","alias_value":"2004.10706v4","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.10706","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"pith_short_12","alias_value":"3ND2R5QFBVRZ","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"pith_short_16","alias_value":"3ND2R5QFBVRZJSX3","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"pith_short_8","alias_value":"3ND2R5QF","created_at":"2026-07-05T01:17:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:3ND2R5QFBVRZJSX3P7FS2MND4H","target":"record","payload":{"canonical_record":{"source":{"id":"2004.10706","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DL","submitted_at":"2020-04-22T17:10:18Z","cross_cats_sorted":["cs.CL"],"title_canon_sha256":"a654231bbc9d290d0e9e5d9bbef5db633b818ae2d7c49133f8138f710e65c615","abstract_canon_sha256":"b0ef2c0bbdbf65502a5d303efa428c58642b13294534af29ab25ec5f4a84f366"},"schema_version":"1.0"},"canonical_sha256":"db47a8f6050d6394cafb7fcb2d31a3e1d44b60065d28c6843e72dde0501c666e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:17:48.474174Z","signature_b64":"rTmYjebb6utv2Y5BgmdpyoGJlunvIidsADaWFg5vMhT81OV6uKfw+p43ED8vnjdhrUU5KxzhnFGKepno1fFDDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"db47a8f6050d6394cafb7fcb2d31a3e1d44b60065d28c6843e72dde0501c666e","last_reissued_at":"2026-07-05T01:17:48.473652Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:17:48.473652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.10706","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:17:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"forNbsftYR1G02thzSveNYXAkghY73C/WPB5NQf+iwz1tmoJRBTITimZZxlOEN9rijiF5PrwqbBQ/yABWfYTCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:01:33.424566Z"},"content_sha256":"c6988f655ae73eb314f97cd7b5bd30610a457a0d431a0811c793d49dc2ec03e0","schema_version":"1.0","event_id":"sha256:c6988f655ae73eb314f97cd7b5bd30610a457a0d431a0811c793d49dc2ec03e0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:3ND2R5QFBVRZJSX3P7FS2MND4H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"CORD-19: The COVID-19 Open Research Dataset","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.CL"],"primary_cat":"cs.DL","authors_text":"Alex Wade, Boya Xie, Brandon Stilson, Chris Wilhelm, Daniel S. Weld, Darrin Eide, Devvret Rishi, Dewey Murdick, Doug Burdick, Douglas Raymond, Jerry Sheehan, Jiangjiang Yang, Kathryn Funk, Kuansan Wang, Kyle Lo, Lucy Lu Wang, Nancy Xin Ru Wang, Oren Etzioni, Paul Mooney, Rodney Kinney, Russell Reas, Sebastian Kohlmeier, William Merrill, Yannis Katsis, Yoganand Chandrasekhar, Yunyao Li, Zhihong Shen, Ziyang Liu","submitted_at":"2020-04-22T17:10:18Z","abstract_excerpt":"The COVID-19 Open Research Dataset (CORD-19) is a growing resource of scientific papers on COVID-19 and related historical coronavirus research. CORD-19 is designed to facilitate the development of text mining and information retrieval systems over its rich collection of metadata and structured full text papers. Since its release, CORD-19 has been downloaded over 200K times and has served as the basis of many COVID-19 text mining and discovery systems. In this article, we describe the mechanics of dataset construction, highlighting challenges and key design decisions, provide an overview of ho"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.10706","kind":"arxiv","version":4},"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/2004.10706/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":"2026-07-05T01:17:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gAckyIiLsWyVNXIDaviJEBerwy1BwyRFXYqiMCBv7IgXa1icL/faJ+xu1L8UQzyIrg8q6E5rKnOPqsmaaqUpDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:01:33.425487Z"},"content_sha256":"5ef8fe9d3d1681d32d538f9f3918770417ea9805af5a4a6b5075f57925a7ca03","schema_version":"1.0","event_id":"sha256:5ef8fe9d3d1681d32d538f9f3918770417ea9805af5a4a6b5075f57925a7ca03"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3ND2R5QFBVRZJSX3P7FS2MND4H/bundle.json","state_url":"https://pith.science/pith/3ND2R5QFBVRZJSX3P7FS2MND4H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3ND2R5QFBVRZJSX3P7FS2MND4H/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":"2026-07-07T13:01:33Z","links":{"resolver":"https://pith.science/pith/3ND2R5QFBVRZJSX3P7FS2MND4H","bundle":"https://pith.science/pith/3ND2R5QFBVRZJSX3P7FS2MND4H/bundle.json","state":"https://pith.science/pith/3ND2R5QFBVRZJSX3P7FS2MND4H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3ND2R5QFBVRZJSX3P7FS2MND4H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:3ND2R5QFBVRZJSX3P7FS2MND4H","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":"b0ef2c0bbdbf65502a5d303efa428c58642b13294534af29ab25ec5f4a84f366","cross_cats_sorted":["cs.CL"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DL","submitted_at":"2020-04-22T17:10:18Z","title_canon_sha256":"a654231bbc9d290d0e9e5d9bbef5db633b818ae2d7c49133f8138f710e65c615"},"schema_version":"1.0","source":{"id":"2004.10706","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.10706","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"arxiv_version","alias_value":"2004.10706v4","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.10706","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"pith_short_12","alias_value":"3ND2R5QFBVRZ","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"pith_short_16","alias_value":"3ND2R5QFBVRZJSX3","created_at":"2026-07-05T01:17:48Z"},{"alias_kind":"pith_short_8","alias_value":"3ND2R5QF","created_at":"2026-07-05T01:17:48Z"}],"graph_snapshots":[{"event_id":"sha256:5ef8fe9d3d1681d32d538f9f3918770417ea9805af5a4a6b5075f57925a7ca03","target":"graph","created_at":"2026-07-05T01:17:48Z","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/2004.10706/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The COVID-19 Open Research Dataset (CORD-19) is a growing resource of scientific papers on COVID-19 and related historical coronavirus research. CORD-19 is designed to facilitate the development of text mining and information retrieval systems over its rich collection of metadata and structured full text papers. Since its release, CORD-19 has been downloaded over 200K times and has served as the basis of many COVID-19 text mining and discovery systems. In this article, we describe the mechanics of dataset construction, highlighting challenges and key design decisions, provide an overview of ho","authors_text":"Alex Wade, Boya Xie, Brandon Stilson, Chris Wilhelm, Daniel S. Weld, Darrin Eide, Devvret Rishi, Dewey Murdick, Doug Burdick, Douglas Raymond, Jerry Sheehan, Jiangjiang Yang, Kathryn Funk, Kuansan Wang, Kyle Lo, Lucy Lu Wang, Nancy Xin Ru Wang, Oren Etzioni, Paul Mooney, Rodney Kinney, Russell Reas, Sebastian Kohlmeier, William Merrill, Yannis Katsis, Yoganand Chandrasekhar, Yunyao Li, Zhihong Shen, Ziyang Liu","cross_cats":["cs.CL"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DL","submitted_at":"2020-04-22T17:10:18Z","title":"CORD-19: The COVID-19 Open Research Dataset"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.10706","kind":"arxiv","version":4},"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:c6988f655ae73eb314f97cd7b5bd30610a457a0d431a0811c793d49dc2ec03e0","target":"record","created_at":"2026-07-05T01:17:48Z","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":"b0ef2c0bbdbf65502a5d303efa428c58642b13294534af29ab25ec5f4a84f366","cross_cats_sorted":["cs.CL"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DL","submitted_at":"2020-04-22T17:10:18Z","title_canon_sha256":"a654231bbc9d290d0e9e5d9bbef5db633b818ae2d7c49133f8138f710e65c615"},"schema_version":"1.0","source":{"id":"2004.10706","kind":"arxiv","version":4}},"canonical_sha256":"db47a8f6050d6394cafb7fcb2d31a3e1d44b60065d28c6843e72dde0501c666e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"db47a8f6050d6394cafb7fcb2d31a3e1d44b60065d28c6843e72dde0501c666e","first_computed_at":"2026-07-05T01:17:48.473652Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:17:48.473652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rTmYjebb6utv2Y5BgmdpyoGJlunvIidsADaWFg5vMhT81OV6uKfw+p43ED8vnjdhrUU5KxzhnFGKepno1fFDDA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:17:48.474174Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.10706","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c6988f655ae73eb314f97cd7b5bd30610a457a0d431a0811c793d49dc2ec03e0","sha256:5ef8fe9d3d1681d32d538f9f3918770417ea9805af5a4a6b5075f57925a7ca03"],"state_sha256":"b0f33405a0d616846367cd570add0d20ea46a043fca8f2b2280fdf0f06dfb007"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bgo8hddIaXw5Z4nZAvGiLyvqJ5bx7UTHi1BcgJ+ZPPoI/nv5WXEEVMr2GevcKU6f0FrwBeScCDebfKb0L1dABA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T13:01:33.429611Z","bundle_sha256":"661d7d0b756c4f8f9d84be2b045a100996366e0965702e05929f5375f104f2c7"}}