{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:JI42FZSMBX5TTK3DJITRVIZ75H","short_pith_number":"pith:JI42FZSM","canonical_record":{"source":{"id":"2606.06647","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-06-04T18:54:34Z","cross_cats_sorted":["q-bio.NC"],"title_canon_sha256":"bc98677691a3bf0b64445f8ab1ac95d3cef6332969327fa6ed31013e9ceb6eec","abstract_canon_sha256":"8ddc34a9077e1c23021a9b34f04ae20339eadb811d0fd170854fc30d2de06c3a"},"schema_version":"1.0"},"canonical_sha256":"4a39a2e64c0dfb39ab634a271aa33fe9d73e81e3ad63a4270128ec1c3facba4e","source":{"kind":"arxiv","id":"2606.06647","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.06647","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"arxiv_version","alias_value":"2606.06647v1","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.06647","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"pith_short_12","alias_value":"JI42FZSMBX5T","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"pith_short_16","alias_value":"JI42FZSMBX5TTK3D","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"pith_short_8","alias_value":"JI42FZSM","created_at":"2026-06-08T01:04:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:JI42FZSMBX5TTK3DJITRVIZ75H","target":"record","payload":{"canonical_record":{"source":{"id":"2606.06647","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-06-04T18:54:34Z","cross_cats_sorted":["q-bio.NC"],"title_canon_sha256":"bc98677691a3bf0b64445f8ab1ac95d3cef6332969327fa6ed31013e9ceb6eec","abstract_canon_sha256":"8ddc34a9077e1c23021a9b34f04ae20339eadb811d0fd170854fc30d2de06c3a"},"schema_version":"1.0"},"canonical_sha256":"4a39a2e64c0dfb39ab634a271aa33fe9d73e81e3ad63a4270128ec1c3facba4e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-08T01:04:20.809155Z","signature_b64":"MItzduyak8y8wGiFTGPrMoLftwtFnRU105B6+kCI0F7vwOtWQ1bBAkLVhCL/Ps+/hpxj97f6VtsdllBtGGLpBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a39a2e64c0dfb39ab634a271aa33fe9d73e81e3ad63a4270128ec1c3facba4e","last_reissued_at":"2026-06-08T01:04:20.808177Z","signature_status":"signed_v1","first_computed_at":"2026-06-08T01:04:20.808177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.06647","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":"2026-06-08T01:04:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C7x4s1697d2yjDrt00lljzCkk1xAACTiuEG3laKpgCq0ZZCh+hVUZxKOzF4MUT3tIiwcrztmX5iKrecvINSrBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T21:55:40.750386Z"},"content_sha256":"ba4c1c7931b6ac1803636275de4f5ca7a402968773c5a28b26fc165e9dca105e","schema_version":"1.0","event_id":"sha256:ba4c1c7931b6ac1803636275de4f5ca7a402968773c5a28b26fc165e9dca105e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:JI42FZSMBX5TTK3DJITRVIZ75H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Identity Trap in EEG Foundation Models: A Diagnostic Audit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-bio.NC"],"primary_cat":"cs.LG","authors_text":"Jun-You Lin, Tzyy-Ping Jung, Ying Choon Wu","submitted_at":"2026-06-04T18:54:34Z","abstract_excerpt":"Objective. EEG foundation models (FMs) report strong accuracy on clinical resting-state EEG. However, high accuracy under subject-disjoint cross-validation remains ambiguous: it can reflect a genuine clinical biomarker, or subject-identity features that correlate with the label. We name this the Identity Trap and ask whether it can be diagnosed at the representation level before fine-tuning.\n  Approach. We propose FMScope, a frozen-representation protocol packaging five diagnostics: variance decomposition, subject-axis erasure, aperiodic 1/f ablation, layer-wise label probing, and within-subje"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.06647","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/2606.06647/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":"2026-06-08T01:04:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WBYTVbTy9Ro0AAWRILCIZSQw7IQiG3WcNHBcKpvIzXsgB3mTafGiwtSQJcqVsO7IHIkkaTDdv1fTESo9UGezCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T21:55:40.750780Z"},"content_sha256":"e6351c2efafbec07fb13e5a0611926d3c5ff66ad621789fa43ebf151de51419a","schema_version":"1.0","event_id":"sha256:e6351c2efafbec07fb13e5a0611926d3c5ff66ad621789fa43ebf151de51419a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JI42FZSMBX5TTK3DJITRVIZ75H/bundle.json","state_url":"https://pith.science/pith/JI42FZSMBX5TTK3DJITRVIZ75H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JI42FZSMBX5TTK3DJITRVIZ75H/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":"2026-06-20T21:55:40Z","links":{"resolver":"https://pith.science/pith/JI42FZSMBX5TTK3DJITRVIZ75H","bundle":"https://pith.science/pith/JI42FZSMBX5TTK3DJITRVIZ75H/bundle.json","state":"https://pith.science/pith/JI42FZSMBX5TTK3DJITRVIZ75H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JI42FZSMBX5TTK3DJITRVIZ75H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:JI42FZSMBX5TTK3DJITRVIZ75H","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":"8ddc34a9077e1c23021a9b34f04ae20339eadb811d0fd170854fc30d2de06c3a","cross_cats_sorted":["q-bio.NC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-06-04T18:54:34Z","title_canon_sha256":"bc98677691a3bf0b64445f8ab1ac95d3cef6332969327fa6ed31013e9ceb6eec"},"schema_version":"1.0","source":{"id":"2606.06647","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.06647","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"arxiv_version","alias_value":"2606.06647v1","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.06647","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"pith_short_12","alias_value":"JI42FZSMBX5T","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"pith_short_16","alias_value":"JI42FZSMBX5TTK3D","created_at":"2026-06-08T01:04:20Z"},{"alias_kind":"pith_short_8","alias_value":"JI42FZSM","created_at":"2026-06-08T01:04:20Z"}],"graph_snapshots":[{"event_id":"sha256:e6351c2efafbec07fb13e5a0611926d3c5ff66ad621789fa43ebf151de51419a","target":"graph","created_at":"2026-06-08T01:04:20Z","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/2606.06647/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Objective. EEG foundation models (FMs) report strong accuracy on clinical resting-state EEG. However, high accuracy under subject-disjoint cross-validation remains ambiguous: it can reflect a genuine clinical biomarker, or subject-identity features that correlate with the label. We name this the Identity Trap and ask whether it can be diagnosed at the representation level before fine-tuning.\n  Approach. We propose FMScope, a frozen-representation protocol packaging five diagnostics: variance decomposition, subject-axis erasure, aperiodic 1/f ablation, layer-wise label probing, and within-subje","authors_text":"Jun-You Lin, Tzyy-Ping Jung, Ying Choon Wu","cross_cats":["q-bio.NC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-06-04T18:54:34Z","title":"The Identity Trap in EEG Foundation Models: A Diagnostic Audit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.06647","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:ba4c1c7931b6ac1803636275de4f5ca7a402968773c5a28b26fc165e9dca105e","target":"record","created_at":"2026-06-08T01:04:20Z","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":"8ddc34a9077e1c23021a9b34f04ae20339eadb811d0fd170854fc30d2de06c3a","cross_cats_sorted":["q-bio.NC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-06-04T18:54:34Z","title_canon_sha256":"bc98677691a3bf0b64445f8ab1ac95d3cef6332969327fa6ed31013e9ceb6eec"},"schema_version":"1.0","source":{"id":"2606.06647","kind":"arxiv","version":1}},"canonical_sha256":"4a39a2e64c0dfb39ab634a271aa33fe9d73e81e3ad63a4270128ec1c3facba4e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4a39a2e64c0dfb39ab634a271aa33fe9d73e81e3ad63a4270128ec1c3facba4e","first_computed_at":"2026-06-08T01:04:20.808177Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-08T01:04:20.808177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MItzduyak8y8wGiFTGPrMoLftwtFnRU105B6+kCI0F7vwOtWQ1bBAkLVhCL/Ps+/hpxj97f6VtsdllBtGGLpBQ==","signature_status":"signed_v1","signed_at":"2026-06-08T01:04:20.809155Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.06647","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ba4c1c7931b6ac1803636275de4f5ca7a402968773c5a28b26fc165e9dca105e","sha256:e6351c2efafbec07fb13e5a0611926d3c5ff66ad621789fa43ebf151de51419a"],"state_sha256":"63f4905daa676623180f4eedd274d794936dc7102d6ac074d5db0c140d2e6257"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MAlaCTvKlHUkkr45cAP6Z7QuimyyEm9TEQE31lEFq8AZSgeIqVFKJ/WaQg6eWBhjpYdJbfqAtD2rn/cS+1eEAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T21:55:40.752794Z","bundle_sha256":"57aac82aa753cf9501d33c6e9245621e68a3ed523c09b331ec5b2ad0d225e79f"}}