{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:JPLKPBZI55SS2FNAQ7GCVBUGCL","short_pith_number":"pith:JPLKPBZI","canonical_record":{"source":{"id":"1903.01780","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.SI","submitted_at":"2019-03-05T12:10:11Z","cross_cats_sorted":["cs.HC"],"title_canon_sha256":"9b3ac26def9a4aa8aba34cee5aa731089f0e77faae3f99a3300e221ef0df4683","abstract_canon_sha256":"c2a5e4f6b935d0fb2112ff37cc10b9a31246d5b234cbad4cf857be2c0573287e"},"schema_version":"1.0"},"canonical_sha256":"4bd6a78728ef652d15a087cc2a868612c597dfe2ec908fae996cd1a5497803ae","source":{"kind":"arxiv","id":"1903.01780","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.01780","created_at":"2026-05-17T23:51:59Z"},{"alias_kind":"arxiv_version","alias_value":"1903.01780v1","created_at":"2026-05-17T23:51:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.01780","created_at":"2026-05-17T23:51:59Z"},{"alias_kind":"pith_short_12","alias_value":"JPLKPBZI55SS","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"JPLKPBZI55SS2FNA","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"JPLKPBZI","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:JPLKPBZI55SS2FNAQ7GCVBUGCL","target":"record","payload":{"canonical_record":{"source":{"id":"1903.01780","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.SI","submitted_at":"2019-03-05T12:10:11Z","cross_cats_sorted":["cs.HC"],"title_canon_sha256":"9b3ac26def9a4aa8aba34cee5aa731089f0e77faae3f99a3300e221ef0df4683","abstract_canon_sha256":"c2a5e4f6b935d0fb2112ff37cc10b9a31246d5b234cbad4cf857be2c0573287e"},"schema_version":"1.0"},"canonical_sha256":"4bd6a78728ef652d15a087cc2a868612c597dfe2ec908fae996cd1a5497803ae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:59.777268Z","signature_b64":"vnK1vGgFSwMbOApK6PoaG1aryBLoM6yKTMwUsiyZM/olGja17C0K8FgnxtSisYcqHWvpMSnkDNUVc3VYMcJJCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4bd6a78728ef652d15a087cc2a868612c597dfe2ec908fae996cd1a5497803ae","last_reissued_at":"2026-05-17T23:51:59.776903Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:59.776903Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.01780","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":"2026-05-17T23:51:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G7bPivGwIAFoPhHc+qZwbtOY5PS1Bv+k2nDWfpTQWS4IB/HleukIE68XGpMQ3iXJ26bfyzw9qa3ozRDcURikAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T20:05:33.666958Z"},"content_sha256":"55e16a991decbdc84af477fb262979cfce8008acd2dd5054b5d8e9e680106d62","schema_version":"1.0","event_id":"sha256:55e16a991decbdc84af477fb262979cfce8008acd2dd5054b5d8e9e680106d62"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:JPLKPBZI55SS2FNAQ7GCVBUGCL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Trust and Trustworthiness in Social Recommender Systems","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.HC"],"primary_cat":"cs.SI","authors_text":"D. Scott McCrickard, Taha Hassan","submitted_at":"2019-03-05T12:10:11Z","abstract_excerpt":"The prevalence of misinformation on online social media has tangible empirical connections to increasing political polarization and partisan antipathy in the United States. Ranking algorithms for social recommendation often encode broad assumptions about network structure (like homophily) and group cognition (like, social action is largely imitative). Assumptions like these can be na\\\"ive and exclusionary in the era of fake news and ideological uniformity towards the political poles. We examine these assumptions with aid from the user-centric framework of trustworthiness in social recommendati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.01780","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":""},"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":"2026-05-17T23:51:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C1rZdcHv1p+T2AM3SmvSENXBG1Sk1srDdInkXpJFg2CKNndXxXcyIzFWEJAJv/PXSLnMN2cWCTBWXxL1aVpNAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T20:05:33.667306Z"},"content_sha256":"cfaa49cba5b1268caa223054e44255cd58f99a8611d100e47d1c2e9d8379e83c","schema_version":"1.0","event_id":"sha256:cfaa49cba5b1268caa223054e44255cd58f99a8611d100e47d1c2e9d8379e83c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JPLKPBZI55SS2FNAQ7GCVBUGCL/bundle.json","state_url":"https://pith.science/pith/JPLKPBZI55SS2FNAQ7GCVBUGCL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JPLKPBZI55SS2FNAQ7GCVBUGCL/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":"2026-06-04T20:05:33Z","links":{"resolver":"https://pith.science/pith/JPLKPBZI55SS2FNAQ7GCVBUGCL","bundle":"https://pith.science/pith/JPLKPBZI55SS2FNAQ7GCVBUGCL/bundle.json","state":"https://pith.science/pith/JPLKPBZI55SS2FNAQ7GCVBUGCL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JPLKPBZI55SS2FNAQ7GCVBUGCL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:JPLKPBZI55SS2FNAQ7GCVBUGCL","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":"c2a5e4f6b935d0fb2112ff37cc10b9a31246d5b234cbad4cf857be2c0573287e","cross_cats_sorted":["cs.HC"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.SI","submitted_at":"2019-03-05T12:10:11Z","title_canon_sha256":"9b3ac26def9a4aa8aba34cee5aa731089f0e77faae3f99a3300e221ef0df4683"},"schema_version":"1.0","source":{"id":"1903.01780","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.01780","created_at":"2026-05-17T23:51:59Z"},{"alias_kind":"arxiv_version","alias_value":"1903.01780v1","created_at":"2026-05-17T23:51:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.01780","created_at":"2026-05-17T23:51:59Z"},{"alias_kind":"pith_short_12","alias_value":"JPLKPBZI55SS","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"JPLKPBZI55SS2FNA","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"JPLKPBZI","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:cfaa49cba5b1268caa223054e44255cd58f99a8611d100e47d1c2e9d8379e83c","target":"graph","created_at":"2026-05-17T23:51:59Z","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":"The prevalence of misinformation on online social media has tangible empirical connections to increasing political polarization and partisan antipathy in the United States. Ranking algorithms for social recommendation often encode broad assumptions about network structure (like homophily) and group cognition (like, social action is largely imitative). Assumptions like these can be na\\\"ive and exclusionary in the era of fake news and ideological uniformity towards the political poles. We examine these assumptions with aid from the user-centric framework of trustworthiness in social recommendati","authors_text":"D. Scott McCrickard, Taha Hassan","cross_cats":["cs.HC"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.SI","submitted_at":"2019-03-05T12:10:11Z","title":"Trust and Trustworthiness in Social Recommender Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.01780","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":"sha256:55e16a991decbdc84af477fb262979cfce8008acd2dd5054b5d8e9e680106d62","target":"record","created_at":"2026-05-17T23:51:59Z","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":"c2a5e4f6b935d0fb2112ff37cc10b9a31246d5b234cbad4cf857be2c0573287e","cross_cats_sorted":["cs.HC"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.SI","submitted_at":"2019-03-05T12:10:11Z","title_canon_sha256":"9b3ac26def9a4aa8aba34cee5aa731089f0e77faae3f99a3300e221ef0df4683"},"schema_version":"1.0","source":{"id":"1903.01780","kind":"arxiv","version":1}},"canonical_sha256":"4bd6a78728ef652d15a087cc2a868612c597dfe2ec908fae996cd1a5497803ae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4bd6a78728ef652d15a087cc2a868612c597dfe2ec908fae996cd1a5497803ae","first_computed_at":"2026-05-17T23:51:59.776903Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:59.776903Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vnK1vGgFSwMbOApK6PoaG1aryBLoM6yKTMwUsiyZM/olGja17C0K8FgnxtSisYcqHWvpMSnkDNUVc3VYMcJJCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:59.777268Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.01780","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:55e16a991decbdc84af477fb262979cfce8008acd2dd5054b5d8e9e680106d62","sha256:cfaa49cba5b1268caa223054e44255cd58f99a8611d100e47d1c2e9d8379e83c"],"state_sha256":"2b890dab3743391aee1cb898a604ae6cbe2c2b7bb5e853488acf46de54e29438"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wGsZBmie+37r/IjqqxMFs0fzu7jY/2R18Px/9EONsu1tAs7i2JHG0lWA9utGb2L1+heOqcuyoDjFLo8ojwBTBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T20:05:33.670922Z","bundle_sha256":"ad6da642789581800dadd4a516de7054aba7af29745b64c7def1cf0354a16726"}}