{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:X3WIX3UDPSOUJNZFZ47VBMLW6J","short_pith_number":"pith:X3WIX3UD","canonical_record":{"source":{"id":"2001.00594","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-01-02T19:01:45Z","cross_cats_sorted":["cs.SI","stat.ML"],"title_canon_sha256":"7fcdb4f46c33a8e4a705f286669d8adca925932e9da345b9c9122b3205eb05b4","abstract_canon_sha256":"cdb2d92ca8d23414630d77d404d43f812280532043f00f4600b30e39ae4ce9b8"},"schema_version":"1.0"},"canonical_sha256":"beec8bee837c9d44b725cf3f50b176f26e47986de6f86c6d61205846dc0c018c","source":{"kind":"arxiv","id":"2001.00594","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.00594","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"arxiv_version","alias_value":"2001.00594v1","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.00594","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"pith_short_12","alias_value":"X3WIX3UDPSOU","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"pith_short_16","alias_value":"X3WIX3UDPSOUJNZF","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"pith_short_8","alias_value":"X3WIX3UD","created_at":"2026-07-05T00:29:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:X3WIX3UDPSOUJNZFZ47VBMLW6J","target":"record","payload":{"canonical_record":{"source":{"id":"2001.00594","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-01-02T19:01:45Z","cross_cats_sorted":["cs.SI","stat.ML"],"title_canon_sha256":"7fcdb4f46c33a8e4a705f286669d8adca925932e9da345b9c9122b3205eb05b4","abstract_canon_sha256":"cdb2d92ca8d23414630d77d404d43f812280532043f00f4600b30e39ae4ce9b8"},"schema_version":"1.0"},"canonical_sha256":"beec8bee837c9d44b725cf3f50b176f26e47986de6f86c6d61205846dc0c018c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:29:30.404694Z","signature_b64":"3DWg7J4+Uy7YUx+scmXKOJFATOMHRZMjZIf7EjEuv8qpJp+VXTFq0rBTNfKL3t0Nh+Q+Igj7SmHmljIh2iIaCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"beec8bee837c9d44b725cf3f50b176f26e47986de6f86c6d61205846dc0c018c","last_reissued_at":"2026-07-05T00:29:30.404345Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:29:30.404345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.00594","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":"2026-07-05T00:29:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uvaOW5vyoFd3Fpfjg3hF6M73r5LV15gUocT5lty6gVZV5kOr9jxVgklo0h+lQtGQyVleKOCiirxgEB5GJyNwDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T17:32:07.231686Z"},"content_sha256":"85b4f486205274ec50c75f4187c3d709b9426b65575d550f5fe57171695bc113","schema_version":"1.0","event_id":"sha256:85b4f486205274ec50c75f4187c3d709b9426b65575d550f5fe57171695bc113"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:X3WIX3UDPSOUJNZFZ47VBMLW6J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Large-scale Gender/Age Prediction of Tumblr Users","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SI","stat.ML"],"primary_cat":"cs.LG","authors_text":"Changwei Hu, Keith Yamamoto, Matt Gillingham, Shanmugam Ramasamy, Tejaswi Kasturi, Yao Zhan, Yifan Hu","submitted_at":"2020-01-02T19:01:45Z","abstract_excerpt":"Tumblr, as a leading content provider and social media, attracts 371 million monthly visits, 280 million blogs and 53.3 million daily posts. The popularity of Tumblr provides great opportunities for advertisers to promote their products through sponsored posts. However, it is a challenging task to target specific demographic groups for ads, since Tumblr does not require user information like gender and ages during their registration. Hence, to promote ad targeting, it is essential to predict user's demography using rich content such as posts, images and social connections. In this paper, we pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.00594","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/2001.00594/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":"2026-07-05T00:29:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SgWvL/EuW1QENg3PtyLURa25dKoq+caFzlQf6apAgZHUDLDGTTT9PK1ApfEdWfgDt2qM5CFQ8IjTyAURNi9hBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T17:32:07.232199Z"},"content_sha256":"5b7c59ef3187e2aab93bfea537268c1c910ad791eca11ec016aad6262be5ef64","schema_version":"1.0","event_id":"sha256:5b7c59ef3187e2aab93bfea537268c1c910ad791eca11ec016aad6262be5ef64"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3WIX3UDPSOUJNZFZ47VBMLW6J/bundle.json","state_url":"https://pith.science/pith/X3WIX3UDPSOUJNZFZ47VBMLW6J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3WIX3UDPSOUJNZFZ47VBMLW6J/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":"2026-08-05T17:32:07Z","links":{"resolver":"https://pith.science/pith/X3WIX3UDPSOUJNZFZ47VBMLW6J","bundle":"https://pith.science/pith/X3WIX3UDPSOUJNZFZ47VBMLW6J/bundle.json","state":"https://pith.science/pith/X3WIX3UDPSOUJNZFZ47VBMLW6J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3WIX3UDPSOUJNZFZ47VBMLW6J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:X3WIX3UDPSOUJNZFZ47VBMLW6J","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":"cdb2d92ca8d23414630d77d404d43f812280532043f00f4600b30e39ae4ce9b8","cross_cats_sorted":["cs.SI","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-01-02T19:01:45Z","title_canon_sha256":"7fcdb4f46c33a8e4a705f286669d8adca925932e9da345b9c9122b3205eb05b4"},"schema_version":"1.0","source":{"id":"2001.00594","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.00594","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"arxiv_version","alias_value":"2001.00594v1","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.00594","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"pith_short_12","alias_value":"X3WIX3UDPSOU","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"pith_short_16","alias_value":"X3WIX3UDPSOUJNZF","created_at":"2026-07-05T00:29:30Z"},{"alias_kind":"pith_short_8","alias_value":"X3WIX3UD","created_at":"2026-07-05T00:29:30Z"}],"graph_snapshots":[{"event_id":"sha256:5b7c59ef3187e2aab93bfea537268c1c910ad791eca11ec016aad6262be5ef64","target":"graph","created_at":"2026-07-05T00:29:30Z","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/2001.00594/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Tumblr, as a leading content provider and social media, attracts 371 million monthly visits, 280 million blogs and 53.3 million daily posts. The popularity of Tumblr provides great opportunities for advertisers to promote their products through sponsored posts. However, it is a challenging task to target specific demographic groups for ads, since Tumblr does not require user information like gender and ages during their registration. Hence, to promote ad targeting, it is essential to predict user's demography using rich content such as posts, images and social connections. In this paper, we pr","authors_text":"Changwei Hu, Keith Yamamoto, Matt Gillingham, Shanmugam Ramasamy, Tejaswi Kasturi, Yao Zhan, Yifan Hu","cross_cats":["cs.SI","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-01-02T19:01:45Z","title":"Large-scale Gender/Age Prediction of Tumblr Users"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.00594","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":"sha256:85b4f486205274ec50c75f4187c3d709b9426b65575d550f5fe57171695bc113","target":"record","created_at":"2026-07-05T00:29:30Z","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":"cdb2d92ca8d23414630d77d404d43f812280532043f00f4600b30e39ae4ce9b8","cross_cats_sorted":["cs.SI","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-01-02T19:01:45Z","title_canon_sha256":"7fcdb4f46c33a8e4a705f286669d8adca925932e9da345b9c9122b3205eb05b4"},"schema_version":"1.0","source":{"id":"2001.00594","kind":"arxiv","version":1}},"canonical_sha256":"beec8bee837c9d44b725cf3f50b176f26e47986de6f86c6d61205846dc0c018c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"beec8bee837c9d44b725cf3f50b176f26e47986de6f86c6d61205846dc0c018c","first_computed_at":"2026-07-05T00:29:30.404345Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:29:30.404345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3DWg7J4+Uy7YUx+scmXKOJFATOMHRZMjZIf7EjEuv8qpJp+VXTFq0rBTNfKL3t0Nh+Q+Igj7SmHmljIh2iIaCg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:29:30.404694Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.00594","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:85b4f486205274ec50c75f4187c3d709b9426b65575d550f5fe57171695bc113","sha256:5b7c59ef3187e2aab93bfea537268c1c910ad791eca11ec016aad6262be5ef64"],"state_sha256":"fe1ed4b524e9442087878d604343145d87474767798904321934048bf29eaea1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cuvqir5skkJg9u+hvgUig6ErsxI9YGmF1ow6Q9OOJenlUf6S1T75V8uC2pe0TwMYEz1U0J8QRO1Pb/FAmz3RCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T17:32:07.238718Z","bundle_sha256":"5a981e3efd260dec0324283b3ca3a1aba627ae51d5419c018e8a52f2307bbd5d"}}