{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:KAMODJVCZDY3SRP4IEBHA5Y5OK","short_pith_number":"pith:KAMODJVC","canonical_record":{"source":{"id":"2102.06173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-02-11T18:38:34Z","cross_cats_sorted":[],"title_canon_sha256":"98246258f49b1e190c37bb4202391a1994e292ac42bdb5ef3c75c70935aa2a69","abstract_canon_sha256":"7e1eb3bc0c43853d1f3805b5f4ff1167cf9c0dc0b2a21a635b812c386de8d9ac"},"schema_version":"1.0"},"canonical_sha256":"5018e1a6a2c8f1b945fc410270771d72b75079172420cc05c95b424efb6f20ea","source":{"kind":"arxiv","id":"2102.06173","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.06173","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"arxiv_version","alias_value":"2102.06173v1","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.06173","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"pith_short_12","alias_value":"KAMODJVCZDY3","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"pith_short_16","alias_value":"KAMODJVCZDY3SRP4","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"pith_short_8","alias_value":"KAMODJVC","created_at":"2026-07-05T02:14:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:KAMODJVCZDY3SRP4IEBHA5Y5OK","target":"record","payload":{"canonical_record":{"source":{"id":"2102.06173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-02-11T18:38:34Z","cross_cats_sorted":[],"title_canon_sha256":"98246258f49b1e190c37bb4202391a1994e292ac42bdb5ef3c75c70935aa2a69","abstract_canon_sha256":"7e1eb3bc0c43853d1f3805b5f4ff1167cf9c0dc0b2a21a635b812c386de8d9ac"},"schema_version":"1.0"},"canonical_sha256":"5018e1a6a2c8f1b945fc410270771d72b75079172420cc05c95b424efb6f20ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:14:39.094921Z","signature_b64":"AVzBkeP74OR4LXqugzqaHhUAv5ab3Lpur/0Hfr+dqjFmxg5664DQqTBT5i38ttryaYPfemyeOeAIBEWBmQfeBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5018e1a6a2c8f1b945fc410270771d72b75079172420cc05c95b424efb6f20ea","last_reissued_at":"2026-07-05T02:14:39.094408Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:14:39.094408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.06173","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":"2026-07-05T02:14:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g/4ObjohepPjQuJ9UG+JeI97/pGVtA5cqxShNVJouiEkclrPRp3b6RTL+ooNmDHsMccEXUKrITUIOaj/5+iIBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T04:32:03.799873Z"},"content_sha256":"e33e8a994d2aa985c7f672fe15b40f6c72bbea2a142fc8a9ccd0a795330c9c7c","schema_version":"1.0","event_id":"sha256:e33e8a994d2aa985c7f672fe15b40f6c72bbea2a142fc8a9ccd0a795330c9c7c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:KAMODJVCZDY3SRP4IEBHA5Y5OK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Formation of Venus, Earth and Mars: Constrained by isotopes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Johansen, H. Lammer, M. Leitzinger, M. Scherf, R. Brasser","submitted_at":"2021-02-11T18:38:34Z","abstract_excerpt":"We discuss the current state of knowledge of terrestrial planet formation from the aspects of different planet formation models and isotopic data from 182Hf-182W, U-Pb, lithophile-siderophile elements, 48Ca/44Ca isotope samples from planetary building blocks, 36Ar/38Ar, 20Ne/22Ne, 36Ar/22Ne isotope ratios in Venus' and Earth's atmospheres, the expected solar 3He abundance in Earth's deep mantle and Earth's D/H sea water ratios that shed light on the accretion time of the early protoplanets. Accretion scenarios that can explain the different isotope ratios, including a Moon-forming event after "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.06173","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/2102.06173/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":"2026-07-05T02:14:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8QMAEl1TRtke4YWVrBuYREFYl2Pd7w77rWALKcNpVmEoMKOBuyhAwFvAjUqW03Dwb96HB+KwAz7Pl4N77xMDAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T04:32:03.800377Z"},"content_sha256":"d489dfef933282365f0cca2e91141764b61564722237b9322124ac3909fee366","schema_version":"1.0","event_id":"sha256:d489dfef933282365f0cca2e91141764b61564722237b9322124ac3909fee366"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KAMODJVCZDY3SRP4IEBHA5Y5OK/bundle.json","state_url":"https://pith.science/pith/KAMODJVCZDY3SRP4IEBHA5Y5OK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KAMODJVCZDY3SRP4IEBHA5Y5OK/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":"2026-08-10T04:32:03Z","links":{"resolver":"https://pith.science/pith/KAMODJVCZDY3SRP4IEBHA5Y5OK","bundle":"https://pith.science/pith/KAMODJVCZDY3SRP4IEBHA5Y5OK/bundle.json","state":"https://pith.science/pith/KAMODJVCZDY3SRP4IEBHA5Y5OK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KAMODJVCZDY3SRP4IEBHA5Y5OK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:KAMODJVCZDY3SRP4IEBHA5Y5OK","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":"7e1eb3bc0c43853d1f3805b5f4ff1167cf9c0dc0b2a21a635b812c386de8d9ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-02-11T18:38:34Z","title_canon_sha256":"98246258f49b1e190c37bb4202391a1994e292ac42bdb5ef3c75c70935aa2a69"},"schema_version":"1.0","source":{"id":"2102.06173","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.06173","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"arxiv_version","alias_value":"2102.06173v1","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.06173","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"pith_short_12","alias_value":"KAMODJVCZDY3","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"pith_short_16","alias_value":"KAMODJVCZDY3SRP4","created_at":"2026-07-05T02:14:39Z"},{"alias_kind":"pith_short_8","alias_value":"KAMODJVC","created_at":"2026-07-05T02:14:39Z"}],"graph_snapshots":[{"event_id":"sha256:d489dfef933282365f0cca2e91141764b61564722237b9322124ac3909fee366","target":"graph","created_at":"2026-07-05T02:14:39Z","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/2102.06173/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We discuss the current state of knowledge of terrestrial planet formation from the aspects of different planet formation models and isotopic data from 182Hf-182W, U-Pb, lithophile-siderophile elements, 48Ca/44Ca isotope samples from planetary building blocks, 36Ar/38Ar, 20Ne/22Ne, 36Ar/22Ne isotope ratios in Venus' and Earth's atmospheres, the expected solar 3He abundance in Earth's deep mantle and Earth's D/H sea water ratios that shed light on the accretion time of the early protoplanets. Accretion scenarios that can explain the different isotope ratios, including a Moon-forming event after ","authors_text":"A. Johansen, H. Lammer, M. Leitzinger, M. Scherf, R. Brasser","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-02-11T18:38:34Z","title":"Formation of Venus, Earth and Mars: Constrained by isotopes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.06173","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:e33e8a994d2aa985c7f672fe15b40f6c72bbea2a142fc8a9ccd0a795330c9c7c","target":"record","created_at":"2026-07-05T02:14:39Z","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":"7e1eb3bc0c43853d1f3805b5f4ff1167cf9c0dc0b2a21a635b812c386de8d9ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-02-11T18:38:34Z","title_canon_sha256":"98246258f49b1e190c37bb4202391a1994e292ac42bdb5ef3c75c70935aa2a69"},"schema_version":"1.0","source":{"id":"2102.06173","kind":"arxiv","version":1}},"canonical_sha256":"5018e1a6a2c8f1b945fc410270771d72b75079172420cc05c95b424efb6f20ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5018e1a6a2c8f1b945fc410270771d72b75079172420cc05c95b424efb6f20ea","first_computed_at":"2026-07-05T02:14:39.094408Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:14:39.094408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AVzBkeP74OR4LXqugzqaHhUAv5ab3Lpur/0Hfr+dqjFmxg5664DQqTBT5i38ttryaYPfemyeOeAIBEWBmQfeBw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:14:39.094921Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.06173","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e33e8a994d2aa985c7f672fe15b40f6c72bbea2a142fc8a9ccd0a795330c9c7c","sha256:d489dfef933282365f0cca2e91141764b61564722237b9322124ac3909fee366"],"state_sha256":"7cc8487b0d32cd1c0c2d81e2ee9c41c4b2fd1fc8fe77c330accb03d4279e8d5d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tta+uhUXMgCPYQ1AGyDIKx/sfVCb9VnxEaAImDPhb578L5nHYbkerDiuY0oc6atzkabDrFP0TMAucrVo0cmkBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T04:32:03.804056Z","bundle_sha256":"f7004ce6453005ff457f05b2d41140b4d5105658084dca040a43b1ca8a72f596"}}