{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:4JPGVCJYR4QYXKFSW37EROPSIQ","short_pith_number":"pith:4JPGVCJY","schema_version":"1.0","canonical_sha256":"e25e6a89388f218ba8b2b6fe48b9f2442be76d31a8285bdd7bccab76620f47da","source":{"kind":"arxiv","id":"2606.07365","version":1},"attestation_state":"computed","paper":{"title":"A robust PPG foundation model using multimodal physiological supervision","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.LG","authors_text":"Daniel P. Darcy, Eloy Geenjaar, Gouthaman KV, Lie Lu, Scott Daly, Trisha Mittal, Vince Calhoun","submitted_at":"2026-06-05T15:08:50Z","abstract_excerpt":"Photoplethysmography (PPG), a non-invasive measure of changes in blood volume, is widely used in both wearable devices and clinical settings. Recent PPG foundation models either use open-source ICU datasets with pretraining paradigms that require curated data and thus complicate generalization to field-like data, or use closed-source field-like PPG data. In contrast, we propose a PPG foundation model that does not require high-quality or field-like pretraining data, and instead leverages accompanying electrocardiogram and respiratory signals in ICU datasets to select contrastive samples during"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2606.07365","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.LG","submitted_at":"2026-06-05T15:08:50Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"5b7d6147f7254f644c53bf1a83fe6f4dbec3c94317d575727e4c7adfd5347faf","abstract_canon_sha256":"2b8c051d3d5745018aa85270b23dc23d244aadf2121ce37ea4b3f036a51f40c3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-08T01:05:22.272487Z","signature_b64":"owvLsRvcyazpG+DqzCGaY+FxlXrXtM4cZfOrWND/uMmlcDGa1GsDdp+YfoDOXy096pZZJo3/M+d7as2Rwq/XCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e25e6a89388f218ba8b2b6fe48b9f2442be76d31a8285bdd7bccab76620f47da","last_reissued_at":"2026-06-08T01:05:22.271681Z","signature_status":"signed_v1","first_computed_at":"2026-06-08T01:05:22.271681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A robust PPG foundation model using multimodal physiological supervision","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.LG","authors_text":"Daniel P. Darcy, Eloy Geenjaar, Gouthaman KV, Lie Lu, Scott Daly, Trisha Mittal, Vince Calhoun","submitted_at":"2026-06-05T15:08:50Z","abstract_excerpt":"Photoplethysmography (PPG), a non-invasive measure of changes in blood volume, is widely used in both wearable devices and clinical settings. Recent PPG foundation models either use open-source ICU datasets with pretraining paradigms that require curated data and thus complicate generalization to field-like data, or use closed-source field-like PPG data. In contrast, we propose a PPG foundation model that does not require high-quality or field-like pretraining data, and instead leverages accompanying electrocardiogram and respiratory signals in ICU datasets to select contrastive samples during"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.07365","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/2606.07365/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2606.07365","created_at":"2026-06-08T01:05:22.271810+00:00"},{"alias_kind":"arxiv_version","alias_value":"2606.07365v1","created_at":"2026-06-08T01:05:22.271810+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.07365","created_at":"2026-06-08T01:05:22.271810+00:00"},{"alias_kind":"pith_short_12","alias_value":"4JPGVCJYR4QY","created_at":"2026-06-08T01:05:22.271810+00:00"},{"alias_kind":"pith_short_16","alias_value":"4JPGVCJYR4QYXKFS","created_at":"2026-06-08T01:05:22.271810+00:00"},{"alias_kind":"pith_short_8","alias_value":"4JPGVCJY","created_at":"2026-06-08T01:05:22.271810+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ","json":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ.json","graph_json":"https://pith.science/api/pith-number/4JPGVCJYR4QYXKFSW37EROPSIQ/graph.json","events_json":"https://pith.science/api/pith-number/4JPGVCJYR4QYXKFSW37EROPSIQ/events.json","paper":"https://pith.science/paper/4JPGVCJY"},"agent_actions":{"view_html":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ","download_json":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ.json","view_paper":"https://pith.science/paper/4JPGVCJY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2606.07365&json=true","fetch_graph":"https://pith.science/api/pith-number/4JPGVCJYR4QYXKFSW37EROPSIQ/graph.json","fetch_events":"https://pith.science/api/pith-number/4JPGVCJYR4QYXKFSW37EROPSIQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ/action/storage_attestation","attest_author":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ/action/author_attestation","sign_citation":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ/action/citation_signature","submit_replication":"https://pith.science/pith/4JPGVCJYR4QYXKFSW37EROPSIQ/action/replication_record"}},"created_at":"2026-06-08T01:05:22.271810+00:00","updated_at":"2026-06-08T01:05:22.271810+00:00"}