{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:5O7TMR5BHCXS3YHYYRNCCPS64C","short_pith_number":"pith:5O7TMR5B","canonical_record":{"source":{"id":"1501.07201","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"cs.SI","submitted_at":"2015-01-28T17:17:37Z","cross_cats_sorted":["cs.HC","physics.data-an","physics.soc-ph"],"title_canon_sha256":"dc85ab84106559840507dba7b249ab070e4341995c3210fb3f787156258e688f","abstract_canon_sha256":"03c678113105da9ab63eff7954dd9a3c5ef7c8bce3b0526c49d89f0013f707bd"},"schema_version":"1.0"},"canonical_sha256":"ebbf3647a138af2de0f8c45a213e5ee08b15fc9615fa7ff16330c6bf9a0f36da","source":{"kind":"arxiv","id":"1501.07201","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.07201","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"arxiv_version","alias_value":"1501.07201v2","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.07201","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"pith_short_12","alias_value":"5O7TMR5BHCXS","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"5O7TMR5BHCXS3YHY","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"5O7TMR5B","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:5O7TMR5BHCXS3YHYYRNCCPS64C","target":"record","payload":{"canonical_record":{"source":{"id":"1501.07201","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"cs.SI","submitted_at":"2015-01-28T17:17:37Z","cross_cats_sorted":["cs.HC","physics.data-an","physics.soc-ph"],"title_canon_sha256":"dc85ab84106559840507dba7b249ab070e4341995c3210fb3f787156258e688f","abstract_canon_sha256":"03c678113105da9ab63eff7954dd9a3c5ef7c8bce3b0526c49d89f0013f707bd"},"schema_version":"1.0"},"canonical_sha256":"ebbf3647a138af2de0f8c45a213e5ee08b15fc9615fa7ff16330c6bf9a0f36da","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:28:06.594524Z","signature_b64":"xtYuiJWPyfHaUUHgaQK5Cb0OiCeylLCWh7gtXmhcKz5NW8DC47nfhW5NDE9xuykTZZnOe5E4op0wQUMhBRa1CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ebbf3647a138af2de0f8c45a213e5ee08b15fc9615fa7ff16330c6bf9a0f36da","last_reissued_at":"2026-05-18T02:28:06.594089Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:28:06.594089Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.07201","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":"2026-05-18T02:28:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f+ZMO04e3aR27iu1fZVc6EwWjfeTTyxEvHHoxLF+PGszBggxI7kCu0OW/c0W4s2/tNolMOy2/nC9+2HtSk7UCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T23:52:36.036492Z"},"content_sha256":"a5d562ce7e70c3ee3c3ea1dccdd84ca5f129808b12ad8e6f2a91cf341230428a","schema_version":"1.0","event_id":"sha256:a5d562ce7e70c3ee3c3ea1dccdd84ca5f129808b12ad8e6f2a91cf341230428a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:5O7TMR5BHCXS3YHYYRNCCPS64C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Everyday the Same Picture: Popularity and Content Diversity","license":"http://creativecommons.org/licenses/publicdomain/","headline":"","cross_cats":["cs.HC","physics.data-an","physics.soc-ph"],"primary_cat":"cs.SI","authors_text":"Alessandro Bessi, Antonio Scala, Bruno Gon\\c{c}alves, Fabiana Zollo, Fabio Petroni, Michela Del Vicario, Walter Quattrociocchi","submitted_at":"2015-01-28T17:17:37Z","abstract_excerpt":"Facebook is flooded by diverse and heterogeneous content, from kittens up to music and news, passing through satirical and funny stories. Each piece of that corpus reflects the heterogeneity of the underlying social background. In the Italian Facebook we have found an interesting case: a page having more than $40K$ followers that every day posts the same picture of a popular Italian singer. In this work, we use such a page as a control to study and model the relationship between content heterogeneity on popularity. In particular, we use that page for a comparative analysis of information consu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.07201","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":"2026-05-18T02:28:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HCCJiQm1CNYknfQAxYPswh8mmserXAD1E2Jsw1uOxZT3byz5NXIb2k5VTeD/zoS2sOU087vGChThwipbI+vMAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T23:52:36.037102Z"},"content_sha256":"973c3e46529b022a1fc449cf50424a9c3a3ca0954f457c86802a5cdc9bb24a87","schema_version":"1.0","event_id":"sha256:973c3e46529b022a1fc449cf50424a9c3a3ca0954f457c86802a5cdc9bb24a87"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5O7TMR5BHCXS3YHYYRNCCPS64C/bundle.json","state_url":"https://pith.science/pith/5O7TMR5BHCXS3YHYYRNCCPS64C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5O7TMR5BHCXS3YHYYRNCCPS64C/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":"2026-05-23T23:52:36Z","links":{"resolver":"https://pith.science/pith/5O7TMR5BHCXS3YHYYRNCCPS64C","bundle":"https://pith.science/pith/5O7TMR5BHCXS3YHYYRNCCPS64C/bundle.json","state":"https://pith.science/pith/5O7TMR5BHCXS3YHYYRNCCPS64C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5O7TMR5BHCXS3YHYYRNCCPS64C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:5O7TMR5BHCXS3YHYYRNCCPS64C","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":"03c678113105da9ab63eff7954dd9a3c5ef7c8bce3b0526c49d89f0013f707bd","cross_cats_sorted":["cs.HC","physics.data-an","physics.soc-ph"],"license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"cs.SI","submitted_at":"2015-01-28T17:17:37Z","title_canon_sha256":"dc85ab84106559840507dba7b249ab070e4341995c3210fb3f787156258e688f"},"schema_version":"1.0","source":{"id":"1501.07201","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.07201","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"arxiv_version","alias_value":"1501.07201v2","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.07201","created_at":"2026-05-18T02:28:06Z"},{"alias_kind":"pith_short_12","alias_value":"5O7TMR5BHCXS","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"5O7TMR5BHCXS3YHY","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"5O7TMR5B","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:973c3e46529b022a1fc449cf50424a9c3a3ca0954f457c86802a5cdc9bb24a87","target":"graph","created_at":"2026-05-18T02:28:06Z","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":"Facebook is flooded by diverse and heterogeneous content, from kittens up to music and news, passing through satirical and funny stories. Each piece of that corpus reflects the heterogeneity of the underlying social background. In the Italian Facebook we have found an interesting case: a page having more than $40K$ followers that every day posts the same picture of a popular Italian singer. In this work, we use such a page as a control to study and model the relationship between content heterogeneity on popularity. In particular, we use that page for a comparative analysis of information consu","authors_text":"Alessandro Bessi, Antonio Scala, Bruno Gon\\c{c}alves, Fabiana Zollo, Fabio Petroni, Michela Del Vicario, Walter Quattrociocchi","cross_cats":["cs.HC","physics.data-an","physics.soc-ph"],"headline":"","license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"cs.SI","submitted_at":"2015-01-28T17:17:37Z","title":"Everyday the Same Picture: Popularity and Content Diversity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.07201","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:a5d562ce7e70c3ee3c3ea1dccdd84ca5f129808b12ad8e6f2a91cf341230428a","target":"record","created_at":"2026-05-18T02:28:06Z","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":"03c678113105da9ab63eff7954dd9a3c5ef7c8bce3b0526c49d89f0013f707bd","cross_cats_sorted":["cs.HC","physics.data-an","physics.soc-ph"],"license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"cs.SI","submitted_at":"2015-01-28T17:17:37Z","title_canon_sha256":"dc85ab84106559840507dba7b249ab070e4341995c3210fb3f787156258e688f"},"schema_version":"1.0","source":{"id":"1501.07201","kind":"arxiv","version":2}},"canonical_sha256":"ebbf3647a138af2de0f8c45a213e5ee08b15fc9615fa7ff16330c6bf9a0f36da","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ebbf3647a138af2de0f8c45a213e5ee08b15fc9615fa7ff16330c6bf9a0f36da","first_computed_at":"2026-05-18T02:28:06.594089Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:06.594089Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xtYuiJWPyfHaUUHgaQK5Cb0OiCeylLCWh7gtXmhcKz5NW8DC47nfhW5NDE9xuykTZZnOe5E4op0wQUMhBRa1CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:06.594524Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.07201","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a5d562ce7e70c3ee3c3ea1dccdd84ca5f129808b12ad8e6f2a91cf341230428a","sha256:973c3e46529b022a1fc449cf50424a9c3a3ca0954f457c86802a5cdc9bb24a87"],"state_sha256":"ab7d3a75fcf55a62f865dfaabfcdf13e1699611e89dcef7fe2dc91bff5bb80d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aXsgqq52Xek0pXq2Ut95e0DSjzXBrSKvdjjm6V2324qxw5YA3ohsNmDW9mfOVsnfDu9ubJMflXXck4MXkWIzBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T23:52:36.040774Z","bundle_sha256":"2f5e471a46058da3d4f4c87520c7391a352cf8fd2ff4233136d4f9c11a1cbe30"}}