{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:Y3LQFRTAMXO6YVCNK3V54NZKKP","short_pith_number":"pith:Y3LQFRTA","canonical_record":{"source":{"id":"2307.11100","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2023-07-18T02:20:46Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"d66694a313f6af3ef702eb0207b1e31e020dd2e13a8e9fae75dbd48c1acd5823","abstract_canon_sha256":"eb9295c9c82adfe9588ee5fc0d69c6be4e51d01d2b93994b15cb55802eabec3d"},"schema_version":"1.0"},"canonical_sha256":"c6d702c66065ddec544d56ebde372a53f752b0cbdc04e9420873e6ac085602de","source":{"kind":"arxiv","id":"2307.11100","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.11100","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"arxiv_version","alias_value":"2307.11100v1","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.11100","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"pith_short_12","alias_value":"Y3LQFRTAMXO6","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"pith_short_16","alias_value":"Y3LQFRTAMXO6YVCN","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"pith_short_8","alias_value":"Y3LQFRTA","created_at":"2026-07-05T06:33:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:Y3LQFRTAMXO6YVCNK3V54NZKKP","target":"record","payload":{"canonical_record":{"source":{"id":"2307.11100","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2023-07-18T02:20:46Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"d66694a313f6af3ef702eb0207b1e31e020dd2e13a8e9fae75dbd48c1acd5823","abstract_canon_sha256":"eb9295c9c82adfe9588ee5fc0d69c6be4e51d01d2b93994b15cb55802eabec3d"},"schema_version":"1.0"},"canonical_sha256":"c6d702c66065ddec544d56ebde372a53f752b0cbdc04e9420873e6ac085602de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:33:23.537985Z","signature_b64":"/ttMqRGNjvmy+wlZlqsi59nHUVS9JhYo+kcW91X4l8Nq4zkUWOR3JSH6QTbJFDKWA5okvunTnIT2xruIQ/xfAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6d702c66065ddec544d56ebde372a53f752b0cbdc04e9420873e6ac085602de","last_reissued_at":"2026-07-05T06:33:23.537524Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:33:23.537524Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2307.11100","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":"2026-07-05T06:33:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mJxZkTgMYB5D3cM/LM2Yny9zTTJRbzZ0/k4Gw8XaL4jqOFoj/z0BQ32lOcYztI9p63SRooMgStOjQRTrP7LkBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T10:16:35.320099Z"},"content_sha256":"5ff5cae5d1e1364450997a03f87ae8eaa4f8e5a5fe96649b7cde4a3e45bddaa6","schema_version":"1.0","event_id":"sha256:5ff5cae5d1e1364450997a03f87ae8eaa4f8e5a5fe96649b7cde4a3e45bddaa6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:Y3LQFRTAMXO6YVCNK3V54NZKKP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"CSSL-RHA: Contrastive Self-Supervised Learning for Robust Handwriting Authentication","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.MM"],"primary_cat":"cs.CV","authors_text":"Changwen Zheng, Jingyao Wang, Luntian Mou, Wen Gao","submitted_at":"2023-07-18T02:20:46Z","abstract_excerpt":"Handwriting authentication is a valuable tool used in various fields, such as fraud prevention and cultural heritage protection. However, it remains a challenging task due to the complex features, severe damage, and lack of supervision. In this paper, we propose a novel Contrastive Self-Supervised Learning framework for Robust Handwriting Authentication (CSSL-RHA) to address these issues. It can dynamically learn complex yet important features and accurately predict writer identities. Specifically, to remove the negative effects of imperfections and redundancy, we design an information-theoret"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.11100","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/2307.11100/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":"2026-07-05T06:33:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZSdSyT8fgn5vkxtSE/ksVHDT7YKjxls29Jeiq8RsIfYagVdRghQjtf3Iol4KbLeNUylVSIbdZkpxfcNySiUOBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T10:16:35.320733Z"},"content_sha256":"213295dfd21cbccfe5a093a9ec3b3d98694babbdd3902f77aa23b1d54f3c329e","schema_version":"1.0","event_id":"sha256:213295dfd21cbccfe5a093a9ec3b3d98694babbdd3902f77aa23b1d54f3c329e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y3LQFRTAMXO6YVCNK3V54NZKKP/bundle.json","state_url":"https://pith.science/pith/Y3LQFRTAMXO6YVCNK3V54NZKKP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y3LQFRTAMXO6YVCNK3V54NZKKP/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":"2026-08-09T10:16:35Z","links":{"resolver":"https://pith.science/pith/Y3LQFRTAMXO6YVCNK3V54NZKKP","bundle":"https://pith.science/pith/Y3LQFRTAMXO6YVCNK3V54NZKKP/bundle.json","state":"https://pith.science/pith/Y3LQFRTAMXO6YVCNK3V54NZKKP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y3LQFRTAMXO6YVCNK3V54NZKKP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:Y3LQFRTAMXO6YVCNK3V54NZKKP","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":"eb9295c9c82adfe9588ee5fc0d69c6be4e51d01d2b93994b15cb55802eabec3d","cross_cats_sorted":["cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2023-07-18T02:20:46Z","title_canon_sha256":"d66694a313f6af3ef702eb0207b1e31e020dd2e13a8e9fae75dbd48c1acd5823"},"schema_version":"1.0","source":{"id":"2307.11100","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.11100","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"arxiv_version","alias_value":"2307.11100v1","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.11100","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"pith_short_12","alias_value":"Y3LQFRTAMXO6","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"pith_short_16","alias_value":"Y3LQFRTAMXO6YVCN","created_at":"2026-07-05T06:33:23Z"},{"alias_kind":"pith_short_8","alias_value":"Y3LQFRTA","created_at":"2026-07-05T06:33:23Z"}],"graph_snapshots":[{"event_id":"sha256:213295dfd21cbccfe5a093a9ec3b3d98694babbdd3902f77aa23b1d54f3c329e","target":"graph","created_at":"2026-07-05T06:33:23Z","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/2307.11100/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Handwriting authentication is a valuable tool used in various fields, such as fraud prevention and cultural heritage protection. However, it remains a challenging task due to the complex features, severe damage, and lack of supervision. In this paper, we propose a novel Contrastive Self-Supervised Learning framework for Robust Handwriting Authentication (CSSL-RHA) to address these issues. It can dynamically learn complex yet important features and accurately predict writer identities. Specifically, to remove the negative effects of imperfections and redundancy, we design an information-theoret","authors_text":"Changwen Zheng, Jingyao Wang, Luntian Mou, Wen Gao","cross_cats":["cs.MM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2023-07-18T02:20:46Z","title":"CSSL-RHA: Contrastive Self-Supervised Learning for Robust Handwriting Authentication"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.11100","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":"sha256:5ff5cae5d1e1364450997a03f87ae8eaa4f8e5a5fe96649b7cde4a3e45bddaa6","target":"record","created_at":"2026-07-05T06:33:23Z","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":"eb9295c9c82adfe9588ee5fc0d69c6be4e51d01d2b93994b15cb55802eabec3d","cross_cats_sorted":["cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2023-07-18T02:20:46Z","title_canon_sha256":"d66694a313f6af3ef702eb0207b1e31e020dd2e13a8e9fae75dbd48c1acd5823"},"schema_version":"1.0","source":{"id":"2307.11100","kind":"arxiv","version":1}},"canonical_sha256":"c6d702c66065ddec544d56ebde372a53f752b0cbdc04e9420873e6ac085602de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6d702c66065ddec544d56ebde372a53f752b0cbdc04e9420873e6ac085602de","first_computed_at":"2026-07-05T06:33:23.537524Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:33:23.537524Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/ttMqRGNjvmy+wlZlqsi59nHUVS9JhYo+kcW91X4l8Nq4zkUWOR3JSH6QTbJFDKWA5okvunTnIT2xruIQ/xfAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T06:33:23.537985Z","signed_message":"canonical_sha256_bytes"},"source_id":"2307.11100","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ff5cae5d1e1364450997a03f87ae8eaa4f8e5a5fe96649b7cde4a3e45bddaa6","sha256:213295dfd21cbccfe5a093a9ec3b3d98694babbdd3902f77aa23b1d54f3c329e"],"state_sha256":"e505b321e5d0410a3d0791bc435452a4bf2f638214bfde2bc41c45e450e4c077"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+c8a1GyX4o9azKRILDX5BIc3FW21SYT84LzAC/V83A/RHAb96WomDJhnqWhQ4WDgbgITS0oCsDqnxdulW7oWDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T10:16:35.325824Z","bundle_sha256":"937e501014d5807f51ec30ca4850b7462a3e7d6376314cffc380615810e80151"}}