{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:ANCZIVXOVRIMETICGVVWHSQHVL","short_pith_number":"pith:ANCZIVXO","canonical_record":{"source":{"id":"2005.10393","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-05-20T23:37:28Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"70ee669255cff4af23c2ccffcf4ce3fc83befe3f6260b8344e7994a1eb4164a5","abstract_canon_sha256":"ab88c14e5289ae98937f482e81cada538e0d6915fd2e8b6e2614dc852d5dad9f"},"schema_version":"1.0"},"canonical_sha256":"03459456eeac50c24d02356b63ca07aaf1042e43f34edd5960964f0c149d8f53","source":{"kind":"arxiv","id":"2005.10393","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.10393","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"arxiv_version","alias_value":"2005.10393v1","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.10393","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"pith_short_12","alias_value":"ANCZIVXOVRIM","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"pith_short_16","alias_value":"ANCZIVXOVRIMETIC","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"pith_short_8","alias_value":"ANCZIVXO","created_at":"2026-07-05T01:04:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:ANCZIVXOVRIMETICGVVWHSQHVL","target":"record","payload":{"canonical_record":{"source":{"id":"2005.10393","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-05-20T23:37:28Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"70ee669255cff4af23c2ccffcf4ce3fc83befe3f6260b8344e7994a1eb4164a5","abstract_canon_sha256":"ab88c14e5289ae98937f482e81cada538e0d6915fd2e8b6e2614dc852d5dad9f"},"schema_version":"1.0"},"canonical_sha256":"03459456eeac50c24d02356b63ca07aaf1042e43f34edd5960964f0c149d8f53","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:04:53.695026Z","signature_b64":"Lt9iCzQVvE40WJxGxmApMCpj7xlbEeiLZ1e5QIEAUhnx6gxewTJ3sgFYDwnfGwnIRpMSeLNDqnHvEjbyHiF7BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"03459456eeac50c24d02356b63ca07aaf1042e43f34edd5960964f0c149d8f53","last_reissued_at":"2026-07-05T01:04:53.694472Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:04:53.694472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2005.10393","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":"2026-07-05T01:04:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UsNNFJNFs7a0zVBi9WiaNqL8NvSD0Kbw69b+dNnjxhdawfvOKS7ySavHaWbfa/dN+kUEeKkEBuRy768MfBi+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T18:37:39.682076Z"},"content_sha256":"ecd59e6af6016dd7a3c8424d94f486037e7209aca04fd4bef350b45e8758ec88","schema_version":"1.0","event_id":"sha256:ecd59e6af6016dd7a3c8424d94f486037e7209aca04fd4bef350b45e8758ec88"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:ANCZIVXOVRIMETICGVVWHSQHVL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spoofing Attack Detection using the Non-linear Fusion of Sub-band Classifiers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SD"],"primary_cat":"eess.AS","authors_text":"Andreas Nautsch, Hemlata Tak, Jose Patino, Massimiliano Todisco, Nicholas Evans","submitted_at":"2020-05-20T23:37:28Z","abstract_excerpt":"The threat of spoofing can pose a risk to the reliability of automatic speaker verification. Results from the bi-annual ASVspoof evaluations show that effective countermeasures demand front-ends designed specifically for the detection of spoofing artefacts. Given the diversity in spoofing attacks, ensemble methods are particularly effective. The work in this paper shows that a bank of very simple classifiers, each with a front-end tuned to the detection of different spoofing attacks and combined at the score level through non-linear fusion, can deliver superior performance than more sophistica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.10393","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/2005.10393/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":"2026-07-05T01:04:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7LeW78+1nR+eQEVdhJVgmhvxtY9zsHTDSwkbfWwxEBwphxB5/f4RyvHTdT+HI7nI3y+G3OUCFhLL0yZGsGlQAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T18:37:39.682596Z"},"content_sha256":"8124c5805a8c59ddaa179dac415eed30ca0182c23fc115ca87f0701ba5b1562b","schema_version":"1.0","event_id":"sha256:8124c5805a8c59ddaa179dac415eed30ca0182c23fc115ca87f0701ba5b1562b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ANCZIVXOVRIMETICGVVWHSQHVL/bundle.json","state_url":"https://pith.science/pith/ANCZIVXOVRIMETICGVVWHSQHVL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ANCZIVXOVRIMETICGVVWHSQHVL/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":"2026-08-13T18:37:39Z","links":{"resolver":"https://pith.science/pith/ANCZIVXOVRIMETICGVVWHSQHVL","bundle":"https://pith.science/pith/ANCZIVXOVRIMETICGVVWHSQHVL/bundle.json","state":"https://pith.science/pith/ANCZIVXOVRIMETICGVVWHSQHVL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ANCZIVXOVRIMETICGVVWHSQHVL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ANCZIVXOVRIMETICGVVWHSQHVL","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":"ab88c14e5289ae98937f482e81cada538e0d6915fd2e8b6e2614dc852d5dad9f","cross_cats_sorted":["cs.SD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-05-20T23:37:28Z","title_canon_sha256":"70ee669255cff4af23c2ccffcf4ce3fc83befe3f6260b8344e7994a1eb4164a5"},"schema_version":"1.0","source":{"id":"2005.10393","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.10393","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"arxiv_version","alias_value":"2005.10393v1","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.10393","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"pith_short_12","alias_value":"ANCZIVXOVRIM","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"pith_short_16","alias_value":"ANCZIVXOVRIMETIC","created_at":"2026-07-05T01:04:53Z"},{"alias_kind":"pith_short_8","alias_value":"ANCZIVXO","created_at":"2026-07-05T01:04:53Z"}],"graph_snapshots":[{"event_id":"sha256:8124c5805a8c59ddaa179dac415eed30ca0182c23fc115ca87f0701ba5b1562b","target":"graph","created_at":"2026-07-05T01:04:53Z","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/2005.10393/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The threat of spoofing can pose a risk to the reliability of automatic speaker verification. Results from the bi-annual ASVspoof evaluations show that effective countermeasures demand front-ends designed specifically for the detection of spoofing artefacts. Given the diversity in spoofing attacks, ensemble methods are particularly effective. The work in this paper shows that a bank of very simple classifiers, each with a front-end tuned to the detection of different spoofing attacks and combined at the score level through non-linear fusion, can deliver superior performance than more sophistica","authors_text":"Andreas Nautsch, Hemlata Tak, Jose Patino, Massimiliano Todisco, Nicholas Evans","cross_cats":["cs.SD"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-05-20T23:37:28Z","title":"Spoofing Attack Detection using the Non-linear Fusion of Sub-band Classifiers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.10393","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:ecd59e6af6016dd7a3c8424d94f486037e7209aca04fd4bef350b45e8758ec88","target":"record","created_at":"2026-07-05T01:04:53Z","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":"ab88c14e5289ae98937f482e81cada538e0d6915fd2e8b6e2614dc852d5dad9f","cross_cats_sorted":["cs.SD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-05-20T23:37:28Z","title_canon_sha256":"70ee669255cff4af23c2ccffcf4ce3fc83befe3f6260b8344e7994a1eb4164a5"},"schema_version":"1.0","source":{"id":"2005.10393","kind":"arxiv","version":1}},"canonical_sha256":"03459456eeac50c24d02356b63ca07aaf1042e43f34edd5960964f0c149d8f53","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"03459456eeac50c24d02356b63ca07aaf1042e43f34edd5960964f0c149d8f53","first_computed_at":"2026-07-05T01:04:53.694472Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:04:53.694472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Lt9iCzQVvE40WJxGxmApMCpj7xlbEeiLZ1e5QIEAUhnx6gxewTJ3sgFYDwnfGwnIRpMSeLNDqnHvEjbyHiF7BA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:04:53.695026Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.10393","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ecd59e6af6016dd7a3c8424d94f486037e7209aca04fd4bef350b45e8758ec88","sha256:8124c5805a8c59ddaa179dac415eed30ca0182c23fc115ca87f0701ba5b1562b"],"state_sha256":"fb9c3254dd51916b2ad959a11dbe969cb1caeb9702b54aac182a7b334f0004ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m66cREmSqPEuLq+wz2F/1RmfkKLh8nakTOj2sFFKOyVXcFq91uR3zhO+Ex6lG78Xc8Akzk26TfySlNndMePMCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T18:37:39.688220Z","bundle_sha256":"07d464ac25faa277ad16661bb991f1818ddb0545754f4c12d301fbffbe3122f2"}}