{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:WEP7MQU57H4OM27ZR77JV72DV2","short_pith_number":"pith:WEP7MQU5","canonical_record":{"source":{"id":"2104.13247","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-04-27T14:57:44Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"c5178c76c51c07884b81661657329b9f29f6e10d4b71a8aa0c20e1f3843b2925","abstract_canon_sha256":"6d13099822e0c6077aca34b1caa826dd00ccbd041a7fe2619552ac87d63841e5"},"schema_version":"1.0"},"canonical_sha256":"b11ff6429df9f8e66bf98ffe9aff43ae907917f11aac4055ae38e9deecbd5b43","source":{"kind":"arxiv","id":"2104.13247","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.13247","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"arxiv_version","alias_value":"2104.13247v2","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.13247","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"pith_short_12","alias_value":"WEP7MQU57H4O","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"pith_short_16","alias_value":"WEP7MQU57H4OM27Z","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"pith_short_8","alias_value":"WEP7MQU5","created_at":"2026-07-05T03:39:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:WEP7MQU57H4OM27ZR77JV72DV2","target":"record","payload":{"canonical_record":{"source":{"id":"2104.13247","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-04-27T14:57:44Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"c5178c76c51c07884b81661657329b9f29f6e10d4b71a8aa0c20e1f3843b2925","abstract_canon_sha256":"6d13099822e0c6077aca34b1caa826dd00ccbd041a7fe2619552ac87d63841e5"},"schema_version":"1.0"},"canonical_sha256":"b11ff6429df9f8e66bf98ffe9aff43ae907917f11aac4055ae38e9deecbd5b43","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:39:14.602008Z","signature_b64":"JCj7esaZQSdSZsFur4hHf2LYWW9zceo40G4zDuKJKR8XDQl04E4rNryhKqtJlXdBzwY2rXyE4pIwmuA6q1rABw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b11ff6429df9f8e66bf98ffe9aff43ae907917f11aac4055ae38e9deecbd5b43","last_reissued_at":"2026-07-05T03:39:14.601485Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:39:14.601485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.13247","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:39:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iLpo+pXSDXqMSPpN7RAI/66H33tZ8hD4nCMpxhygXX+nIS32A7AoliAfyjjiUwuAxuRhGCzp2ax/xEknEKJrAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T01:32:07.822859Z"},"content_sha256":"49d40d9808fdf200affada54d5767c721d31d5f849ff6375a10d9e1ec48bb47c","schema_version":"1.0","event_id":"sha256:49d40d9808fdf200affada54d5767c721d31d5f849ff6375a10d9e1ec48bb47c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:WEP7MQU57H4OM27ZR77JV72DV2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"IATos: AI-powered pre-screening tool for COVID-19 from cough audio samples","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SD"],"primary_cat":"eess.AS","authors_text":"D. Trejo Pizzo, S. Esteban","submitted_at":"2021-04-27T14:57:44Z","abstract_excerpt":"OBJECTIVE: Our objective is to evaluate the possibility of using cough audio recordings (spontaneous or simulated) to detect sound patterns in people who are diagnosed with COVID-19. The research question that led our work was: what is the sensitivity and specificity of a machine learning based COVID-19 cough classifier, using RT-PCR tests as gold standard?\n  SETTING: The audio samples that were collected for this study belong to individuals who were swabbed in the City of Buenos Aires in 20 public and 1 private facilities where RT-PCR studies were carried out on patients suspected of COVID, a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.13247","kind":"arxiv","version":2},"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/2104.13247/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":"2026-07-05T03:39:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cqGl635nWWxirA96fRi3mHbInBvon8fq8cGFbNpeGGjDe5AdO9Q8odQxOGRB4rMC0IBMzZ5JlAhm2PGovaw5CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T01:32:07.823371Z"},"content_sha256":"0f9974013a23a3bbc7503cad918157e5da03dde87dcf0718c566162c0c1fb1fa","schema_version":"1.0","event_id":"sha256:0f9974013a23a3bbc7503cad918157e5da03dde87dcf0718c566162c0c1fb1fa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WEP7MQU57H4OM27ZR77JV72DV2/bundle.json","state_url":"https://pith.science/pith/WEP7MQU57H4OM27ZR77JV72DV2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WEP7MQU57H4OM27ZR77JV72DV2/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":"2026-08-15T01:32:07Z","links":{"resolver":"https://pith.science/pith/WEP7MQU57H4OM27ZR77JV72DV2","bundle":"https://pith.science/pith/WEP7MQU57H4OM27ZR77JV72DV2/bundle.json","state":"https://pith.science/pith/WEP7MQU57H4OM27ZR77JV72DV2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WEP7MQU57H4OM27ZR77JV72DV2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:WEP7MQU57H4OM27ZR77JV72DV2","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":"6d13099822e0c6077aca34b1caa826dd00ccbd041a7fe2619552ac87d63841e5","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-04-27T14:57:44Z","title_canon_sha256":"c5178c76c51c07884b81661657329b9f29f6e10d4b71a8aa0c20e1f3843b2925"},"schema_version":"1.0","source":{"id":"2104.13247","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.13247","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"arxiv_version","alias_value":"2104.13247v2","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.13247","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"pith_short_12","alias_value":"WEP7MQU57H4O","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"pith_short_16","alias_value":"WEP7MQU57H4OM27Z","created_at":"2026-07-05T03:39:14Z"},{"alias_kind":"pith_short_8","alias_value":"WEP7MQU5","created_at":"2026-07-05T03:39:14Z"}],"graph_snapshots":[{"event_id":"sha256:0f9974013a23a3bbc7503cad918157e5da03dde87dcf0718c566162c0c1fb1fa","target":"graph","created_at":"2026-07-05T03:39:14Z","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/2104.13247/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"OBJECTIVE: Our objective is to evaluate the possibility of using cough audio recordings (spontaneous or simulated) to detect sound patterns in people who are diagnosed with COVID-19. The research question that led our work was: what is the sensitivity and specificity of a machine learning based COVID-19 cough classifier, using RT-PCR tests as gold standard?\n  SETTING: The audio samples that were collected for this study belong to individuals who were swabbed in the City of Buenos Aires in 20 public and 1 private facilities where RT-PCR studies were carried out on patients suspected of COVID, a","authors_text":"D. Trejo Pizzo, S. Esteban","cross_cats":["cs.SD"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-04-27T14:57:44Z","title":"IATos: AI-powered pre-screening tool for COVID-19 from cough audio samples"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.13247","kind":"arxiv","version":2},"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":"sha256:49d40d9808fdf200affada54d5767c721d31d5f849ff6375a10d9e1ec48bb47c","target":"record","created_at":"2026-07-05T03:39:14Z","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":"6d13099822e0c6077aca34b1caa826dd00ccbd041a7fe2619552ac87d63841e5","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-04-27T14:57:44Z","title_canon_sha256":"c5178c76c51c07884b81661657329b9f29f6e10d4b71a8aa0c20e1f3843b2925"},"schema_version":"1.0","source":{"id":"2104.13247","kind":"arxiv","version":2}},"canonical_sha256":"b11ff6429df9f8e66bf98ffe9aff43ae907917f11aac4055ae38e9deecbd5b43","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b11ff6429df9f8e66bf98ffe9aff43ae907917f11aac4055ae38e9deecbd5b43","first_computed_at":"2026-07-05T03:39:14.601485Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:39:14.601485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JCj7esaZQSdSZsFur4hHf2LYWW9zceo40G4zDuKJKR8XDQl04E4rNryhKqtJlXdBzwY2rXyE4pIwmuA6q1rABw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:39:14.602008Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.13247","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:49d40d9808fdf200affada54d5767c721d31d5f849ff6375a10d9e1ec48bb47c","sha256:0f9974013a23a3bbc7503cad918157e5da03dde87dcf0718c566162c0c1fb1fa"],"state_sha256":"07deecb3d4f303e69b70762b0da506d9bb0bd90431819fd3001049ebd14d5c5e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KFt5WFr/xp0AMKAomNV8uWKkyA1uTAi4heWFiP2wU+XYY+sNtrwe2FwV+QRkuQ6E55N5XVAwIfT1kZ3O6S0BAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T01:32:07.826676Z","bundle_sha256":"02b1437a179c0f397bc72e65c839119575da616cf63b2c4816f435b99358c94d"}}