{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:LDFQA6SLQP3EF226OSCA3FKWXP","short_pith_number":"pith:LDFQA6SL","canonical_record":{"source":{"id":"2002.06642","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2020-02-16T18:36:43Z","cross_cats_sorted":[],"title_canon_sha256":"ef585bd93727b2e7701a872b788ceb47d24edee959952414b82239fb7db09aca","abstract_canon_sha256":"d24bdc24bbf5f0530f12db4f2c7e58ab4b93bd95540ba4fd3a1bff3d5af52be9"},"schema_version":"1.0"},"canonical_sha256":"58cb007a4b83f642eb5e74840d9556bbc254a755b31bce1d90ef32dfe22e245b","source":{"kind":"arxiv","id":"2002.06642","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.06642","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"arxiv_version","alias_value":"2002.06642v1","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.06642","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"pith_short_12","alias_value":"LDFQA6SLQP3E","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"pith_short_16","alias_value":"LDFQA6SLQP3EF226","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"pith_short_8","alias_value":"LDFQA6SL","created_at":"2026-07-05T00:41:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:LDFQA6SLQP3EF226OSCA3FKWXP","target":"record","payload":{"canonical_record":{"source":{"id":"2002.06642","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2020-02-16T18:36:43Z","cross_cats_sorted":[],"title_canon_sha256":"ef585bd93727b2e7701a872b788ceb47d24edee959952414b82239fb7db09aca","abstract_canon_sha256":"d24bdc24bbf5f0530f12db4f2c7e58ab4b93bd95540ba4fd3a1bff3d5af52be9"},"schema_version":"1.0"},"canonical_sha256":"58cb007a4b83f642eb5e74840d9556bbc254a755b31bce1d90ef32dfe22e245b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:41:07.897925Z","signature_b64":"Gcii3ptIYtrM3glDf7E/ezHmObqEGCRSSi/o04KhgQ8HhMtQsvHcASHMCXvfeMZ5R0b6UVZzOaAcduBQucprAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58cb007a4b83f642eb5e74840d9556bbc254a755b31bce1d90ef32dfe22e245b","last_reissued_at":"2026-07-05T00:41:07.897586Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:41:07.897586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.06642","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":"2026-07-05T00:41:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OsFdWDsncpqmugD4FXILSQqsPWGFZIM+y5BppFxv+m/nI/jEmy4h9SvWIT0VGeK0oCgAoW4AnWPF1YzsMmCSDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T05:04:05.969958Z"},"content_sha256":"cb39856969d39694aeb06e8631fa9111457cc9fffa20e4e2c3ad75a99585bf97","schema_version":"1.0","event_id":"sha256:cb39856969d39694aeb06e8631fa9111457cc9fffa20e4e2c3ad75a99585bf97"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:LDFQA6SLQP3EF226OSCA3FKWXP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"BciPy: Brain-Computer Interface Software in Python","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.HC","authors_text":"Aziz Ko\\c{c}anao\\u{g}ullar{\\i}, Barry Oken, Daniel Klee, Matthew Lawhead, Melanie Fried-Oken, Shiran Dudy, Tab Memmott","submitted_at":"2020-02-16T18:36:43Z","abstract_excerpt":"There are high technological and software demands associated with conducting brain-computer interface (BCI) research. In order to accelerate the development and accessibility of BCI, it is worthwhile to focus on open-source and desired tooling. Python, a prominent computer language, has emerged as a language of choice for many research and engineering purposes. In this manuscript, we present BciPy, an open-source, Python-based software for conducting BCI research. It was developed with a focus on restoring communication using event-related potential (ERP) spelling interfaces, however, it may b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.06642","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/2002.06642/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":"2026-07-05T00:41:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"encGlYUWirh0k430c2g9c3LZqMwGKFiwbLgR75Fm15CljkjMf+dtKEjpl/reU8ASc+zc4X9XHtO1hmm0gTamDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T05:04:05.970343Z"},"content_sha256":"b2c98cfcba476837b8fd0ee64cb866401586674cbb443d723ce75da3de84f69c","schema_version":"1.0","event_id":"sha256:b2c98cfcba476837b8fd0ee64cb866401586674cbb443d723ce75da3de84f69c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LDFQA6SLQP3EF226OSCA3FKWXP/bundle.json","state_url":"https://pith.science/pith/LDFQA6SLQP3EF226OSCA3FKWXP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LDFQA6SLQP3EF226OSCA3FKWXP/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":"2026-07-09T05:04:05Z","links":{"resolver":"https://pith.science/pith/LDFQA6SLQP3EF226OSCA3FKWXP","bundle":"https://pith.science/pith/LDFQA6SLQP3EF226OSCA3FKWXP/bundle.json","state":"https://pith.science/pith/LDFQA6SLQP3EF226OSCA3FKWXP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LDFQA6SLQP3EF226OSCA3FKWXP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:LDFQA6SLQP3EF226OSCA3FKWXP","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":"d24bdc24bbf5f0530f12db4f2c7e58ab4b93bd95540ba4fd3a1bff3d5af52be9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2020-02-16T18:36:43Z","title_canon_sha256":"ef585bd93727b2e7701a872b788ceb47d24edee959952414b82239fb7db09aca"},"schema_version":"1.0","source":{"id":"2002.06642","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.06642","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"arxiv_version","alias_value":"2002.06642v1","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.06642","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"pith_short_12","alias_value":"LDFQA6SLQP3E","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"pith_short_16","alias_value":"LDFQA6SLQP3EF226","created_at":"2026-07-05T00:41:07Z"},{"alias_kind":"pith_short_8","alias_value":"LDFQA6SL","created_at":"2026-07-05T00:41:07Z"}],"graph_snapshots":[{"event_id":"sha256:b2c98cfcba476837b8fd0ee64cb866401586674cbb443d723ce75da3de84f69c","target":"graph","created_at":"2026-07-05T00:41:07Z","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/2002.06642/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"There are high technological and software demands associated with conducting brain-computer interface (BCI) research. In order to accelerate the development and accessibility of BCI, it is worthwhile to focus on open-source and desired tooling. Python, a prominent computer language, has emerged as a language of choice for many research and engineering purposes. In this manuscript, we present BciPy, an open-source, Python-based software for conducting BCI research. It was developed with a focus on restoring communication using event-related potential (ERP) spelling interfaces, however, it may b","authors_text":"Aziz Ko\\c{c}anao\\u{g}ullar{\\i}, Barry Oken, Daniel Klee, Matthew Lawhead, Melanie Fried-Oken, Shiran Dudy, Tab Memmott","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2020-02-16T18:36:43Z","title":"BciPy: Brain-Computer Interface Software in Python"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.06642","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:cb39856969d39694aeb06e8631fa9111457cc9fffa20e4e2c3ad75a99585bf97","target":"record","created_at":"2026-07-05T00:41:07Z","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":"d24bdc24bbf5f0530f12db4f2c7e58ab4b93bd95540ba4fd3a1bff3d5af52be9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2020-02-16T18:36:43Z","title_canon_sha256":"ef585bd93727b2e7701a872b788ceb47d24edee959952414b82239fb7db09aca"},"schema_version":"1.0","source":{"id":"2002.06642","kind":"arxiv","version":1}},"canonical_sha256":"58cb007a4b83f642eb5e74840d9556bbc254a755b31bce1d90ef32dfe22e245b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58cb007a4b83f642eb5e74840d9556bbc254a755b31bce1d90ef32dfe22e245b","first_computed_at":"2026-07-05T00:41:07.897586Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:41:07.897586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gcii3ptIYtrM3glDf7E/ezHmObqEGCRSSi/o04KhgQ8HhMtQsvHcASHMCXvfeMZ5R0b6UVZzOaAcduBQucprAw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:41:07.897925Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.06642","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb39856969d39694aeb06e8631fa9111457cc9fffa20e4e2c3ad75a99585bf97","sha256:b2c98cfcba476837b8fd0ee64cb866401586674cbb443d723ce75da3de84f69c"],"state_sha256":"75462b0ccb2bf55016a8a82185b5458c12d0e9f76297b9385ee83dbd4627ec97"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DsjDm3rhbNMj29jDBxUA7eBLLnZpS7qO/IE7RA/MqMFpJCo9zm0CUjBFjZUr6HYwTQOcQLUHJgXAgSLjtCauAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T05:04:05.972312Z","bundle_sha256":"1fdeaa1f388b7546d5bb703701ba446bc771cf3119dc32da4297b7b4b2e186f1"}}