{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:F52PVJ6U3RKMBBTXWB6E7NXWEZ","short_pith_number":"pith:F52PVJ6U","canonical_record":{"source":{"id":"1504.05417","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-04-21T13:13:49Z","cross_cats_sorted":[],"title_canon_sha256":"f5a6ecbdafa5d0a93b66aae6b0dd3556f81f3103d339183b1707487a7166adb8","abstract_canon_sha256":"975e7de3bccc606bcc3358c51d25d1d724633ada079fdfdd3824f6ca6b5df3b5"},"schema_version":"1.0"},"canonical_sha256":"2f74faa7d4dc54c08677b07c4fb6f6265a4b918b3f7041ce1e7023947bc21d9f","source":{"kind":"arxiv","id":"1504.05417","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.05417","created_at":"2026-05-18T00:55:17Z"},{"alias_kind":"arxiv_version","alias_value":"1504.05417v1","created_at":"2026-05-18T00:55:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.05417","created_at":"2026-05-18T00:55:17Z"},{"alias_kind":"pith_short_12","alias_value":"F52PVJ6U3RKM","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"F52PVJ6U3RKMBBTX","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"F52PVJ6U","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:F52PVJ6U3RKMBBTXWB6E7NXWEZ","target":"record","payload":{"canonical_record":{"source":{"id":"1504.05417","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-04-21T13:13:49Z","cross_cats_sorted":[],"title_canon_sha256":"f5a6ecbdafa5d0a93b66aae6b0dd3556f81f3103d339183b1707487a7166adb8","abstract_canon_sha256":"975e7de3bccc606bcc3358c51d25d1d724633ada079fdfdd3824f6ca6b5df3b5"},"schema_version":"1.0"},"canonical_sha256":"2f74faa7d4dc54c08677b07c4fb6f6265a4b918b3f7041ce1e7023947bc21d9f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:55:17.689692Z","signature_b64":"GE+b3mddFgTEAaTI6qnNvIR2sSBYsbYzB4LdPImbiAjW05DOVhEw3Uie3YgR3lB5quglJBqN5dabv+liP2eWDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2f74faa7d4dc54c08677b07c4fb6f6265a4b918b3f7041ce1e7023947bc21d9f","last_reissued_at":"2026-05-18T00:55:17.689109Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:55:17.689109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.05417","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":"2026-05-18T00:55:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k48v+joRZjEJcP2tzU6lDQz9C5BLd/uRi1ePuKZyjtfny9SDbwoHuDBzUa2iHnnWYkd7W24PwQfXc+FCcuKxDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:17:44.584488Z"},"content_sha256":"0344547ecaa1ef6fa8f1020ec9d2c63932bfa9685ebaa548318c5ceea5946838","schema_version":"1.0","event_id":"sha256:0344547ecaa1ef6fa8f1020ec9d2c63932bfa9685ebaa548318c5ceea5946838"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:F52PVJ6U3RKMBBTXWB6E7NXWEZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mechanisms and Geochemical Models of Core Formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"David C. Rubie, Seth A. Jacobson","submitted_at":"2015-04-21T13:13:49Z","abstract_excerpt":"The formation of the Earth's core is a consequence of planetary accretion and processes in the Earth's interior. The mechanical process of planetary differentiation is likely to occur in large, if not global, magma oceans created by the collisions of planetary embryos. Metal-silicate segregation in magma oceans occurs rapidly and efficiently unlike grain scale percolation according to laboratory experiments and calculations. Geochemical models of the core formation process as planetary accretion proceeds are becoming increasingly realistic. Single stage and continuous core formation models hav"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.05417","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":"2026-05-18T00:55:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ItUxrqtGoKEn/sgi/woIzuxpDdeK5512XyOux9bl0kJbDLkOyoIsNdxnjOE/1nwm1C+KgjADSjYQI0QNWUYkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:17:44.585239Z"},"content_sha256":"601e3712d03b8f908c182cdd9f7ec5981ee3f7340189ab3b070f65a917cbfe74","schema_version":"1.0","event_id":"sha256:601e3712d03b8f908c182cdd9f7ec5981ee3f7340189ab3b070f65a917cbfe74"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F52PVJ6U3RKMBBTXWB6E7NXWEZ/bundle.json","state_url":"https://pith.science/pith/F52PVJ6U3RKMBBTXWB6E7NXWEZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F52PVJ6U3RKMBBTXWB6E7NXWEZ/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":"2026-05-26T23:17:44Z","links":{"resolver":"https://pith.science/pith/F52PVJ6U3RKMBBTXWB6E7NXWEZ","bundle":"https://pith.science/pith/F52PVJ6U3RKMBBTXWB6E7NXWEZ/bundle.json","state":"https://pith.science/pith/F52PVJ6U3RKMBBTXWB6E7NXWEZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F52PVJ6U3RKMBBTXWB6E7NXWEZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:F52PVJ6U3RKMBBTXWB6E7NXWEZ","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":"975e7de3bccc606bcc3358c51d25d1d724633ada079fdfdd3824f6ca6b5df3b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-04-21T13:13:49Z","title_canon_sha256":"f5a6ecbdafa5d0a93b66aae6b0dd3556f81f3103d339183b1707487a7166adb8"},"schema_version":"1.0","source":{"id":"1504.05417","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.05417","created_at":"2026-05-18T00:55:17Z"},{"alias_kind":"arxiv_version","alias_value":"1504.05417v1","created_at":"2026-05-18T00:55:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.05417","created_at":"2026-05-18T00:55:17Z"},{"alias_kind":"pith_short_12","alias_value":"F52PVJ6U3RKM","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"F52PVJ6U3RKMBBTX","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"F52PVJ6U","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:601e3712d03b8f908c182cdd9f7ec5981ee3f7340189ab3b070f65a917cbfe74","target":"graph","created_at":"2026-05-18T00:55:17Z","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 formation of the Earth's core is a consequence of planetary accretion and processes in the Earth's interior. The mechanical process of planetary differentiation is likely to occur in large, if not global, magma oceans created by the collisions of planetary embryos. Metal-silicate segregation in magma oceans occurs rapidly and efficiently unlike grain scale percolation according to laboratory experiments and calculations. Geochemical models of the core formation process as planetary accretion proceeds are becoming increasingly realistic. Single stage and continuous core formation models hav","authors_text":"David C. Rubie, Seth A. Jacobson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-04-21T13:13:49Z","title":"Mechanisms and Geochemical Models of Core Formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.05417","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":"sha256:0344547ecaa1ef6fa8f1020ec9d2c63932bfa9685ebaa548318c5ceea5946838","target":"record","created_at":"2026-05-18T00:55:17Z","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":"975e7de3bccc606bcc3358c51d25d1d724633ada079fdfdd3824f6ca6b5df3b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-04-21T13:13:49Z","title_canon_sha256":"f5a6ecbdafa5d0a93b66aae6b0dd3556f81f3103d339183b1707487a7166adb8"},"schema_version":"1.0","source":{"id":"1504.05417","kind":"arxiv","version":1}},"canonical_sha256":"2f74faa7d4dc54c08677b07c4fb6f6265a4b918b3f7041ce1e7023947bc21d9f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2f74faa7d4dc54c08677b07c4fb6f6265a4b918b3f7041ce1e7023947bc21d9f","first_computed_at":"2026-05-18T00:55:17.689109Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:55:17.689109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GE+b3mddFgTEAaTI6qnNvIR2sSBYsbYzB4LdPImbiAjW05DOVhEw3Uie3YgR3lB5quglJBqN5dabv+liP2eWDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:55:17.689692Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.05417","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0344547ecaa1ef6fa8f1020ec9d2c63932bfa9685ebaa548318c5ceea5946838","sha256:601e3712d03b8f908c182cdd9f7ec5981ee3f7340189ab3b070f65a917cbfe74"],"state_sha256":"14fc12087bc86bb74d84a2323cbdcf9c79b9133f69ce98ba58435e5be44bc128"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BK36/867A46DzxR5FJE0z7QKU7eq2vW1juIr4TE0fOp7hBVqI4/wuZAY+mPgsscConi07df1N+oCGCfn37G9DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:17:44.588834Z","bundle_sha256":"8fcc3dca4ebaf9ac6ceb6c3236c3ba0165e20dfc4100abd004c2de8a201b7c01"}}