{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:VS4NR7OSVIYCFLPFRW6DRGROXD","short_pith_number":"pith:VS4NR7OS","canonical_record":{"source":{"id":"2503.15102","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-03-19T11:01:26Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"fe82894ea118104d2c53e8fd2fa9e096f5f91bc09c6e6ff84ebfb3673dc6fa1f","abstract_canon_sha256":"75a8e9ae64f8befad949308041b5d0250a2339593c9fd1d9fa2a21d9290ae863"},"schema_version":"1.0"},"canonical_sha256":"acb8d8fdd2aa3022ade58dbc389a2eb8d596f93ed638b3558c299b553da42bf1","source":{"kind":"arxiv","id":"2503.15102","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.15102","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"arxiv_version","alias_value":"2503.15102v1","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.15102","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"pith_short_12","alias_value":"VS4NR7OSVIYC","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"pith_short_16","alias_value":"VS4NR7OSVIYCFLPF","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"pith_short_8","alias_value":"VS4NR7OS","created_at":"2026-07-05T10:34:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:VS4NR7OSVIYCFLPFRW6DRGROXD","target":"record","payload":{"canonical_record":{"source":{"id":"2503.15102","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-03-19T11:01:26Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"fe82894ea118104d2c53e8fd2fa9e096f5f91bc09c6e6ff84ebfb3673dc6fa1f","abstract_canon_sha256":"75a8e9ae64f8befad949308041b5d0250a2339593c9fd1d9fa2a21d9290ae863"},"schema_version":"1.0"},"canonical_sha256":"acb8d8fdd2aa3022ade58dbc389a2eb8d596f93ed638b3558c299b553da42bf1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:34:46.315487Z","signature_b64":"ZOPPMGKBBVXsX4zDHBObXitpCRN0PIrFsw3rRUCIN6XyGSv1nDRPqXlhfOeaIrB4fCPCMa1WClPKU/SUoN14DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"acb8d8fdd2aa3022ade58dbc389a2eb8d596f93ed638b3558c299b553da42bf1","last_reissued_at":"2026-07-05T10:34:46.314927Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:34:46.314927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2503.15102","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":"2026-07-05T10:34:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t4x7Ibmpl720X/ANeYHjag9kE0hnuKsbk4of3bZS7AQKVK4CPDdMgbUs29ez/zrc49OQVHkkjTWyH/I0CkQeAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T17:42:33.838058Z"},"content_sha256":"0a634815343fb40bc65a8b34f2e86230e1784eff9b987df4545bb4fc1b05fe48","schema_version":"1.0","event_id":"sha256:0a634815343fb40bc65a8b34f2e86230e1784eff9b987df4545bb4fc1b05fe48"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:VS4NR7OSVIYCFLPFRW6DRGROXD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comparison of the earliest NC and CC planetesimals: Evidence from ungrouped iron meteorites","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["physics.geo-ph"],"primary_cat":"astro-ph.EP","authors_text":"Christoph Burkhardt, Fridolin Spitzer, Thomas S. Kruijer, Thorsten Kleine","submitted_at":"2025-03-19T11:01:26Z","abstract_excerpt":"Isotope anomalies in meteorites reveal a fundamental dichotomy between non-carbonaceous- (NC) and carbonaceous-type (CC) planetary bodies. Until now, this dichotomy is established for the major meteorite groups, representing about 36 distinct parent bodies. Ungrouped meteorites represent an even larger number of additional and so far mostly unexplored parent bodies. Here, the genetics and chronology of 26 ungrouped iron meteorites are investigated. The ungrouped irons confirm the NC-CC dichotomy for Mo, where NC and CC meteorites define two distinct, subparallel s-process mixing lines. All ung"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.15102","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/2503.15102/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":"2026-07-05T10:34:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B61ocTA6s3/noiZF1mQbqsCvrTCbzQH2+Cmp5X6cDqsuQoPj4FW7GJJ+fQuzfvTP2MSw2TqbzkxmHUXdcvGjAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T17:42:33.838455Z"},"content_sha256":"0b9f286232f2e054626aceefac3e6f415b9414fda5ec064c631b7c4ab564b2c6","schema_version":"1.0","event_id":"sha256:0b9f286232f2e054626aceefac3e6f415b9414fda5ec064c631b7c4ab564b2c6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VS4NR7OSVIYCFLPFRW6DRGROXD/bundle.json","state_url":"https://pith.science/pith/VS4NR7OSVIYCFLPFRW6DRGROXD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VS4NR7OSVIYCFLPFRW6DRGROXD/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":"2026-07-06T17:42:33Z","links":{"resolver":"https://pith.science/pith/VS4NR7OSVIYCFLPFRW6DRGROXD","bundle":"https://pith.science/pith/VS4NR7OSVIYCFLPFRW6DRGROXD/bundle.json","state":"https://pith.science/pith/VS4NR7OSVIYCFLPFRW6DRGROXD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VS4NR7OSVIYCFLPFRW6DRGROXD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:VS4NR7OSVIYCFLPFRW6DRGROXD","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":"75a8e9ae64f8befad949308041b5d0250a2339593c9fd1d9fa2a21d9290ae863","cross_cats_sorted":["physics.geo-ph"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-03-19T11:01:26Z","title_canon_sha256":"fe82894ea118104d2c53e8fd2fa9e096f5f91bc09c6e6ff84ebfb3673dc6fa1f"},"schema_version":"1.0","source":{"id":"2503.15102","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.15102","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"arxiv_version","alias_value":"2503.15102v1","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.15102","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"pith_short_12","alias_value":"VS4NR7OSVIYC","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"pith_short_16","alias_value":"VS4NR7OSVIYCFLPF","created_at":"2026-07-05T10:34:46Z"},{"alias_kind":"pith_short_8","alias_value":"VS4NR7OS","created_at":"2026-07-05T10:34:46Z"}],"graph_snapshots":[{"event_id":"sha256:0b9f286232f2e054626aceefac3e6f415b9414fda5ec064c631b7c4ab564b2c6","target":"graph","created_at":"2026-07-05T10:34:46Z","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/2503.15102/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Isotope anomalies in meteorites reveal a fundamental dichotomy between non-carbonaceous- (NC) and carbonaceous-type (CC) planetary bodies. Until now, this dichotomy is established for the major meteorite groups, representing about 36 distinct parent bodies. Ungrouped meteorites represent an even larger number of additional and so far mostly unexplored parent bodies. Here, the genetics and chronology of 26 ungrouped iron meteorites are investigated. The ungrouped irons confirm the NC-CC dichotomy for Mo, where NC and CC meteorites define two distinct, subparallel s-process mixing lines. All ung","authors_text":"Christoph Burkhardt, Fridolin Spitzer, Thomas S. Kruijer, Thorsten Kleine","cross_cats":["physics.geo-ph"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-03-19T11:01:26Z","title":"Comparison of the earliest NC and CC planetesimals: Evidence from ungrouped iron meteorites"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.15102","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":"sha256:0a634815343fb40bc65a8b34f2e86230e1784eff9b987df4545bb4fc1b05fe48","target":"record","created_at":"2026-07-05T10:34:46Z","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":"75a8e9ae64f8befad949308041b5d0250a2339593c9fd1d9fa2a21d9290ae863","cross_cats_sorted":["physics.geo-ph"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-03-19T11:01:26Z","title_canon_sha256":"fe82894ea118104d2c53e8fd2fa9e096f5f91bc09c6e6ff84ebfb3673dc6fa1f"},"schema_version":"1.0","source":{"id":"2503.15102","kind":"arxiv","version":1}},"canonical_sha256":"acb8d8fdd2aa3022ade58dbc389a2eb8d596f93ed638b3558c299b553da42bf1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"acb8d8fdd2aa3022ade58dbc389a2eb8d596f93ed638b3558c299b553da42bf1","first_computed_at":"2026-07-05T10:34:46.314927Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:34:46.314927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZOPPMGKBBVXsX4zDHBObXitpCRN0PIrFsw3rRUCIN6XyGSv1nDRPqXlhfOeaIrB4fCPCMa1WClPKU/SUoN14DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:34:46.315487Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.15102","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0a634815343fb40bc65a8b34f2e86230e1784eff9b987df4545bb4fc1b05fe48","sha256:0b9f286232f2e054626aceefac3e6f415b9414fda5ec064c631b7c4ab564b2c6"],"state_sha256":"455571a79230063674ebf28a1a1df2a421925baf901ec3f31786c3f3481b4fa2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gsFPwHSjGEV1W7GwiaJI2P1MBlp8xj8eUmiMkjoQrBWCXA1srip7XBeTsR1QlY9k+rB6xV39nH/6WMijJng5BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T17:42:33.840393Z","bundle_sha256":"72c05de47ed7c6949a5e9f6313f980e05e77d1ab63d14e1983d3bba2675ab8fe"}}