{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:WSKNHQUH3CQFWYWSVT4E7PWWR7","short_pith_number":"pith:WSKNHQUH","canonical_record":{"source":{"id":"1512.01882","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2015-12-07T02:07:21Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"25bdfe4f17a694811f216a306a0f9c0973c5f4f0129f2d3894fb2ddc432e033b","abstract_canon_sha256":"10ccfeb4f2200df63f1c49f01d77f3215655570e920395b6073cee6c2b4de4c7"},"schema_version":"1.0"},"canonical_sha256":"b494d3c287d8a05b62d2acf84fbed68fc013e92336b1369ee29ef7e4dce7b080","source":{"kind":"arxiv","id":"1512.01882","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.01882","created_at":"2026-05-18T01:24:37Z"},{"alias_kind":"arxiv_version","alias_value":"1512.01882v2","created_at":"2026-05-18T01:24:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.01882","created_at":"2026-05-18T01:24:37Z"},{"alias_kind":"pith_short_12","alias_value":"WSKNHQUH3CQF","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WSKNHQUH3CQFWYWS","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WSKNHQUH","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:WSKNHQUH3CQFWYWSVT4E7PWWR7","target":"record","payload":{"canonical_record":{"source":{"id":"1512.01882","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2015-12-07T02:07:21Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"25bdfe4f17a694811f216a306a0f9c0973c5f4f0129f2d3894fb2ddc432e033b","abstract_canon_sha256":"10ccfeb4f2200df63f1c49f01d77f3215655570e920395b6073cee6c2b4de4c7"},"schema_version":"1.0"},"canonical_sha256":"b494d3c287d8a05b62d2acf84fbed68fc013e92336b1369ee29ef7e4dce7b080","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:37.974795Z","signature_b64":"hooxdohIwtwEyMoW+AiBxBocwGI/oLSzljLOE5dj8XXF4n3o3ZJn5qBlIMainK4P0CLjfGsgqzlV8TRoSNHpDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b494d3c287d8a05b62d2acf84fbed68fc013e92336b1369ee29ef7e4dce7b080","last_reissued_at":"2026-05-18T01:24:37.974410Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:37.974410Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.01882","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:24:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZKLpTlyq5PzQ//8x1fhlDc0HTQxaraabHLacsqPtnZMH1i833NixuLwOm24clsrFi3W1MRTQhDaM/twpM5FeBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T13:14:10.598428Z"},"content_sha256":"8008a0b47b346a1d3127bfc8bc1292f85ad04f13b9f92e148bbb8f37c75443bc","schema_version":"1.0","event_id":"sha256:8008a0b47b346a1d3127bfc8bc1292f85ad04f13b9f92e148bbb8f37c75443bc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:WSKNHQUH3CQFWYWSVT4E7PWWR7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"THCHS-30 : A Free Chinese Speech Corpus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SD"],"primary_cat":"cs.CL","authors_text":"Dong Wang, Xuewei Zhang","submitted_at":"2015-12-07T02:07:21Z","abstract_excerpt":"Speech data is crucially important for speech recognition research. There are quite some speech databases that can be purchased at prices that are reasonable for most research institutes. However, for young people who just start research activities or those who just gain initial interest in this direction, the cost for data is still an annoying barrier. We support the `free data' movement in speech recognition: research institutes (particularly supported by public funds) publish their data freely so that new researchers can obtain sufficient data to kick of their career. In this paper, we foll"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.01882","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T01:24:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KV+9Jg8EbD65saWcgPrmapU1jlJ2AUEAVngfPFCAyNrYpgZN0Iow4+B3MrcrEeGM0jsTbgqcsvG3aAuBjiXpCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T13:14:10.598768Z"},"content_sha256":"40d6fbc2ea8810a5bbbcbedfe5a1f47bb9012b6d6aa685c9759201eff437e771","schema_version":"1.0","event_id":"sha256:40d6fbc2ea8810a5bbbcbedfe5a1f47bb9012b6d6aa685c9759201eff437e771"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WSKNHQUH3CQFWYWSVT4E7PWWR7/bundle.json","state_url":"https://pith.science/pith/WSKNHQUH3CQFWYWSVT4E7PWWR7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WSKNHQUH3CQFWYWSVT4E7PWWR7/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":"2026-07-03T13:14:10Z","links":{"resolver":"https://pith.science/pith/WSKNHQUH3CQFWYWSVT4E7PWWR7","bundle":"https://pith.science/pith/WSKNHQUH3CQFWYWSVT4E7PWWR7/bundle.json","state":"https://pith.science/pith/WSKNHQUH3CQFWYWSVT4E7PWWR7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WSKNHQUH3CQFWYWSVT4E7PWWR7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WSKNHQUH3CQFWYWSVT4E7PWWR7","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":"10ccfeb4f2200df63f1c49f01d77f3215655570e920395b6073cee6c2b4de4c7","cross_cats_sorted":["cs.SD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2015-12-07T02:07:21Z","title_canon_sha256":"25bdfe4f17a694811f216a306a0f9c0973c5f4f0129f2d3894fb2ddc432e033b"},"schema_version":"1.0","source":{"id":"1512.01882","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.01882","created_at":"2026-05-18T01:24:37Z"},{"alias_kind":"arxiv_version","alias_value":"1512.01882v2","created_at":"2026-05-18T01:24:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.01882","created_at":"2026-05-18T01:24:37Z"},{"alias_kind":"pith_short_12","alias_value":"WSKNHQUH3CQF","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WSKNHQUH3CQFWYWS","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WSKNHQUH","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:40d6fbc2ea8810a5bbbcbedfe5a1f47bb9012b6d6aa685c9759201eff437e771","target":"graph","created_at":"2026-05-18T01:24:37Z","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"},"paper":{"abstract_excerpt":"Speech data is crucially important for speech recognition research. There are quite some speech databases that can be purchased at prices that are reasonable for most research institutes. However, for young people who just start research activities or those who just gain initial interest in this direction, the cost for data is still an annoying barrier. We support the `free data' movement in speech recognition: research institutes (particularly supported by public funds) publish their data freely so that new researchers can obtain sufficient data to kick of their career. In this paper, we foll","authors_text":"Dong Wang, Xuewei Zhang","cross_cats":["cs.SD"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2015-12-07T02:07:21Z","title":"THCHS-30 : A Free Chinese Speech Corpus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.01882","kind":"arxiv","version":2},"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":"sha256:8008a0b47b346a1d3127bfc8bc1292f85ad04f13b9f92e148bbb8f37c75443bc","target":"record","created_at":"2026-05-18T01:24:37Z","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":"10ccfeb4f2200df63f1c49f01d77f3215655570e920395b6073cee6c2b4de4c7","cross_cats_sorted":["cs.SD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2015-12-07T02:07:21Z","title_canon_sha256":"25bdfe4f17a694811f216a306a0f9c0973c5f4f0129f2d3894fb2ddc432e033b"},"schema_version":"1.0","source":{"id":"1512.01882","kind":"arxiv","version":2}},"canonical_sha256":"b494d3c287d8a05b62d2acf84fbed68fc013e92336b1369ee29ef7e4dce7b080","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b494d3c287d8a05b62d2acf84fbed68fc013e92336b1369ee29ef7e4dce7b080","first_computed_at":"2026-05-18T01:24:37.974410Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:37.974410Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hooxdohIwtwEyMoW+AiBxBocwGI/oLSzljLOE5dj8XXF4n3o3ZJn5qBlIMainK4P0CLjfGsgqzlV8TRoSNHpDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:37.974795Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.01882","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8008a0b47b346a1d3127bfc8bc1292f85ad04f13b9f92e148bbb8f37c75443bc","sha256:40d6fbc2ea8810a5bbbcbedfe5a1f47bb9012b6d6aa685c9759201eff437e771"],"state_sha256":"a20b5633238adc750a88e7fc9fe4b296d4d1e284c56ce47cdea85da3a128d364"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I0ktiB4y1P9WrvBSuXxUp30S157/OmZEFF1FmsOwTL8u2ANLBLUxBFDYiN01f6L7uciE+GMVzzty+UxqF3y1DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-03T13:14:10.600570Z","bundle_sha256":"96c208fe4fcbddd073cdcdee6c8e0595b9b69f08e0f0ec7f57ebcd2beaf5dda8"}}