{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:MSUETI7DBD77RPICFJL56I7IXD","short_pith_number":"pith:MSUETI7D","canonical_record":{"source":{"id":"2407.05368","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SD","submitted_at":"2024-07-07T13:43:55Z","cross_cats_sorted":["cs.AI","cs.IR","eess.AS"],"title_canon_sha256":"2ea95bbb39a9657933f36e3c6157d8d84686fe77d78e93d5cea5a3b4b06d077d","abstract_canon_sha256":"a6ec3365a7e9a9ad7f2d980dfb3a826689c92071bcc71cec9a8067ce602e1d61"},"schema_version":"1.0"},"canonical_sha256":"64a849a3e308fff8bd022a57df23e8b8f2aa541937af4e4cc5cfa3a509c60786","source":{"kind":"arxiv","id":"2407.05368","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.05368","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"arxiv_version","alias_value":"2407.05368v1","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.05368","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"pith_short_12","alias_value":"MSUETI7DBD77","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"pith_short_16","alias_value":"MSUETI7DBD77RPIC","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"pith_short_8","alias_value":"MSUETI7D","created_at":"2026-07-05T08:41:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:MSUETI7DBD77RPICFJL56I7IXD","target":"record","payload":{"canonical_record":{"source":{"id":"2407.05368","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SD","submitted_at":"2024-07-07T13:43:55Z","cross_cats_sorted":["cs.AI","cs.IR","eess.AS"],"title_canon_sha256":"2ea95bbb39a9657933f36e3c6157d8d84686fe77d78e93d5cea5a3b4b06d077d","abstract_canon_sha256":"a6ec3365a7e9a9ad7f2d980dfb3a826689c92071bcc71cec9a8067ce602e1d61"},"schema_version":"1.0"},"canonical_sha256":"64a849a3e308fff8bd022a57df23e8b8f2aa541937af4e4cc5cfa3a509c60786","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:41:12.000532Z","signature_b64":"vRFaZgpqNAAbSFoXaJyQgJx2sXMpSaiGNQmBay3XHad7oi6DqlNsU9ZmPVxxxC+obp6m3GCJyV2BAUnH+9tvCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"64a849a3e308fff8bd022a57df23e8b8f2aa541937af4e4cc5cfa3a509c60786","last_reissued_at":"2026-07-05T08:41:12.000048Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:41:12.000048Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.05368","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":"2026-07-05T08:41:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AI5Q+8FsuLpK7EztyLq76g7sNaQ7+ROKqxgmb/eQtiVNm15tCSj5PnUhhdpNTDaFq5SoguOb+jtdgXaIuUnFDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-14T09:44:06.587866Z"},"content_sha256":"e2ae85775551c0bba423fe15895409c7f4a840e6d9a10af0616690dec961ba18","schema_version":"1.0","event_id":"sha256:e2ae85775551c0bba423fe15895409c7f4a840e6d9a10af0616690dec961ba18"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:MSUETI7DBD77RPICFJL56I7IXD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Music Era Recognition Using Supervised Contrastive Learning and Artist Information","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI","cs.IR","eess.AS"],"primary_cat":"cs.SD","authors_text":"Ju-Chiang Wang, Qiqi He, Wei Li, Wei-Tsung Lu, Weituo Hao, Xuchen Song","submitted_at":"2024-07-07T13:43:55Z","abstract_excerpt":"Does popular music from the 60s sound different than that of the 90s? Prior study has shown that there would exist some variations of patterns and regularities related to instrumentation changes and growing loudness across multi-decadal trends. This indicates that perceiving the era of a song from musical features such as audio and artist information is possible. Music era information can be an important feature for playlist generation and recommendation. However, the release year of a song can be inaccessible in many circumstances. This paper addresses a novel task of music era recognition. W"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.05368","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/2407.05368/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":"2026-07-05T08:41:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J+7gpnVWEAtgH9rijzCnMRiIpZvaqHHMGVqds/9wApkuQtaEZk73NkFXOKZDC+UUdI73FRwILIxUQdA0lwojAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-14T09:44:06.588247Z"},"content_sha256":"40db6d5972582856b4f88444f07ab19bd6858ccbc44175fadc24cbe4172abbd5","schema_version":"1.0","event_id":"sha256:40db6d5972582856b4f88444f07ab19bd6858ccbc44175fadc24cbe4172abbd5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MSUETI7DBD77RPICFJL56I7IXD/bundle.json","state_url":"https://pith.science/pith/MSUETI7DBD77RPICFJL56I7IXD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MSUETI7DBD77RPICFJL56I7IXD/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":"2026-07-14T09:44:06Z","links":{"resolver":"https://pith.science/pith/MSUETI7DBD77RPICFJL56I7IXD","bundle":"https://pith.science/pith/MSUETI7DBD77RPICFJL56I7IXD/bundle.json","state":"https://pith.science/pith/MSUETI7DBD77RPICFJL56I7IXD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MSUETI7DBD77RPICFJL56I7IXD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:MSUETI7DBD77RPICFJL56I7IXD","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":"a6ec3365a7e9a9ad7f2d980dfb3a826689c92071bcc71cec9a8067ce602e1d61","cross_cats_sorted":["cs.AI","cs.IR","eess.AS"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SD","submitted_at":"2024-07-07T13:43:55Z","title_canon_sha256":"2ea95bbb39a9657933f36e3c6157d8d84686fe77d78e93d5cea5a3b4b06d077d"},"schema_version":"1.0","source":{"id":"2407.05368","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.05368","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"arxiv_version","alias_value":"2407.05368v1","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.05368","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"pith_short_12","alias_value":"MSUETI7DBD77","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"pith_short_16","alias_value":"MSUETI7DBD77RPIC","created_at":"2026-07-05T08:41:12Z"},{"alias_kind":"pith_short_8","alias_value":"MSUETI7D","created_at":"2026-07-05T08:41:12Z"}],"graph_snapshots":[{"event_id":"sha256:40db6d5972582856b4f88444f07ab19bd6858ccbc44175fadc24cbe4172abbd5","target":"graph","created_at":"2026-07-05T08:41:12Z","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/2407.05368/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Does popular music from the 60s sound different than that of the 90s? Prior study has shown that there would exist some variations of patterns and regularities related to instrumentation changes and growing loudness across multi-decadal trends. This indicates that perceiving the era of a song from musical features such as audio and artist information is possible. Music era information can be an important feature for playlist generation and recommendation. However, the release year of a song can be inaccessible in many circumstances. This paper addresses a novel task of music era recognition. W","authors_text":"Ju-Chiang Wang, Qiqi He, Wei Li, Wei-Tsung Lu, Weituo Hao, Xuchen Song","cross_cats":["cs.AI","cs.IR","eess.AS"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SD","submitted_at":"2024-07-07T13:43:55Z","title":"Music Era Recognition Using Supervised Contrastive Learning and Artist Information"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.05368","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:e2ae85775551c0bba423fe15895409c7f4a840e6d9a10af0616690dec961ba18","target":"record","created_at":"2026-07-05T08:41:12Z","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":"a6ec3365a7e9a9ad7f2d980dfb3a826689c92071bcc71cec9a8067ce602e1d61","cross_cats_sorted":["cs.AI","cs.IR","eess.AS"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SD","submitted_at":"2024-07-07T13:43:55Z","title_canon_sha256":"2ea95bbb39a9657933f36e3c6157d8d84686fe77d78e93d5cea5a3b4b06d077d"},"schema_version":"1.0","source":{"id":"2407.05368","kind":"arxiv","version":1}},"canonical_sha256":"64a849a3e308fff8bd022a57df23e8b8f2aa541937af4e4cc5cfa3a509c60786","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"64a849a3e308fff8bd022a57df23e8b8f2aa541937af4e4cc5cfa3a509c60786","first_computed_at":"2026-07-05T08:41:12.000048Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:41:12.000048Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vRFaZgpqNAAbSFoXaJyQgJx2sXMpSaiGNQmBay3XHad7oi6DqlNsU9ZmPVxxxC+obp6m3GCJyV2BAUnH+9tvCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:41:12.000532Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.05368","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e2ae85775551c0bba423fe15895409c7f4a840e6d9a10af0616690dec961ba18","sha256:40db6d5972582856b4f88444f07ab19bd6858ccbc44175fadc24cbe4172abbd5"],"state_sha256":"d83988100061db2eb35cc3665b0961048241ac28a7480b50294ccb0db0cc6847"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VirG/o3DK/Zv54UgDe/Rfda+rFf61NKgmEs8lW3IcdNjZBu1tQyCnrBqHjpPbhwJDeGLXqTgsXxOs+pwtbU2CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-14T09:44:06.590438Z","bundle_sha256":"7c174d316f54b2f1ca81907063b35c11b44f48594a10ec9ba6dcfce7f200e6ac"}}