{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:WZDBMCGGAK342EYJBGGTQN7VID","short_pith_number":"pith:WZDBMCGG","canonical_record":{"source":{"id":"2303.01854","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-03T11:16:17Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"faaf33ccb38d75b6af70ada499dceb3a657038c5ccd4b9425608c2aed2e7ec40","abstract_canon_sha256":"f814e3d80ec0ca9d46d3d1ada84c144e3b1c77f87050080f39a992f1d870b016"},"schema_version":"1.0"},"canonical_sha256":"b6461608c602b7cd1309098d3837f540e3a496961957b29d889695ed42a9a5ee","source":{"kind":"arxiv","id":"2303.01854","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.01854","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"arxiv_version","alias_value":"2303.01854v1","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.01854","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"pith_short_12","alias_value":"WZDBMCGGAK34","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"pith_short_16","alias_value":"WZDBMCGGAK342EYJ","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"pith_short_8","alias_value":"WZDBMCGG","created_at":"2026-07-05T05:47:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:WZDBMCGGAK342EYJBGGTQN7VID","target":"record","payload":{"canonical_record":{"source":{"id":"2303.01854","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-03T11:16:17Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"faaf33ccb38d75b6af70ada499dceb3a657038c5ccd4b9425608c2aed2e7ec40","abstract_canon_sha256":"f814e3d80ec0ca9d46d3d1ada84c144e3b1c77f87050080f39a992f1d870b016"},"schema_version":"1.0"},"canonical_sha256":"b6461608c602b7cd1309098d3837f540e3a496961957b29d889695ed42a9a5ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:47:50.037932Z","signature_b64":"A86CMg+kMgZEeNlu3DoJtE0PXr8fHh9DC29m873LPMNC4zA/4qvry6eo2nKrGPBIleYItif5PVJhwiwQRDi+DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b6461608c602b7cd1309098d3837f540e3a496961957b29d889695ed42a9a5ee","last_reissued_at":"2026-07-05T05:47:50.037500Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:47:50.037500Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.01854","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":"2026-07-05T05:47:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jVtof5dY4LxqKaAzYC665YxJvBNTcOxusS3lOlocwWxOr+8Spdd5UZt3j5oDOlpglX0OfwDPMbbisWnFhb9qDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-11T13:26:08.718548Z"},"content_sha256":"06ad9857197bbf493530fdfaab1a751fcf0061f4f0b1d206cfc6f293dffe25f4","schema_version":"1.0","event_id":"sha256:06ad9857197bbf493530fdfaab1a751fcf0061f4f0b1d206cfc6f293dffe25f4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:WZDBMCGGAK342EYJBGGTQN7VID","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chemical models of adenine precursors cyanamide and carbodiimide in the interstellar medium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Donghui Quan, Guoming Zhao, Jarken Esimbek, Long-Fei Chen, Runxia Li, Xia Zhang, Yan Zhou","submitted_at":"2023-03-03T11:16:17Z","abstract_excerpt":"Cyanamide (NH2CN) and its isomer, carbodiimide (HNCNH), may form adenine in the interstellar medium (ISM) via a series of reactions. Therefore, they are considered key prebiotic molecules in the study of the origin of life. We used the three-phase NAUTILUS chemical code, which includes the gas, the dust surface, and the icy mantle, to investigate the formation and destruction of cyanamide and carbodiimide. We added over 200 new chemical reactions of the two isomers and related species, and established a relatively complete network. We applied cold core, hot corino/core and shock models to simu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.01854","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/2303.01854/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":"2026-07-05T05:47:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GzdlcAAiwA/VxLEYzxPHvMlUPckENyDDpDTAQxoWIcoDmF7+4UDZo0KNYhGBwPCRqCXumYj+ayKZeqVOmXuMAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-11T13:26:08.718935Z"},"content_sha256":"ab40a078c4dcc920bdabf19daaaeb7a9fa60afa5b56f420c9a6bbde28294bd68","schema_version":"1.0","event_id":"sha256:ab40a078c4dcc920bdabf19daaaeb7a9fa60afa5b56f420c9a6bbde28294bd68"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WZDBMCGGAK342EYJBGGTQN7VID/bundle.json","state_url":"https://pith.science/pith/WZDBMCGGAK342EYJBGGTQN7VID/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WZDBMCGGAK342EYJBGGTQN7VID/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":"2026-07-11T13:26:08Z","links":{"resolver":"https://pith.science/pith/WZDBMCGGAK342EYJBGGTQN7VID","bundle":"https://pith.science/pith/WZDBMCGGAK342EYJBGGTQN7VID/bundle.json","state":"https://pith.science/pith/WZDBMCGGAK342EYJBGGTQN7VID/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WZDBMCGGAK342EYJBGGTQN7VID/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:WZDBMCGGAK342EYJBGGTQN7VID","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":"f814e3d80ec0ca9d46d3d1ada84c144e3b1c77f87050080f39a992f1d870b016","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-03T11:16:17Z","title_canon_sha256":"faaf33ccb38d75b6af70ada499dceb3a657038c5ccd4b9425608c2aed2e7ec40"},"schema_version":"1.0","source":{"id":"2303.01854","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.01854","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"arxiv_version","alias_value":"2303.01854v1","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.01854","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"pith_short_12","alias_value":"WZDBMCGGAK34","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"pith_short_16","alias_value":"WZDBMCGGAK342EYJ","created_at":"2026-07-05T05:47:50Z"},{"alias_kind":"pith_short_8","alias_value":"WZDBMCGG","created_at":"2026-07-05T05:47:50Z"}],"graph_snapshots":[{"event_id":"sha256:ab40a078c4dcc920bdabf19daaaeb7a9fa60afa5b56f420c9a6bbde28294bd68","target":"graph","created_at":"2026-07-05T05:47:50Z","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/2303.01854/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Cyanamide (NH2CN) and its isomer, carbodiimide (HNCNH), may form adenine in the interstellar medium (ISM) via a series of reactions. Therefore, they are considered key prebiotic molecules in the study of the origin of life. We used the three-phase NAUTILUS chemical code, which includes the gas, the dust surface, and the icy mantle, to investigate the formation and destruction of cyanamide and carbodiimide. We added over 200 new chemical reactions of the two isomers and related species, and established a relatively complete network. We applied cold core, hot corino/core and shock models to simu","authors_text":"Donghui Quan, Guoming Zhao, Jarken Esimbek, Long-Fei Chen, Runxia Li, Xia Zhang, Yan Zhou","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-03T11:16:17Z","title":"Chemical models of adenine precursors cyanamide and carbodiimide in the interstellar medium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.01854","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":"sha256:06ad9857197bbf493530fdfaab1a751fcf0061f4f0b1d206cfc6f293dffe25f4","target":"record","created_at":"2026-07-05T05:47:50Z","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":"f814e3d80ec0ca9d46d3d1ada84c144e3b1c77f87050080f39a992f1d870b016","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-03T11:16:17Z","title_canon_sha256":"faaf33ccb38d75b6af70ada499dceb3a657038c5ccd4b9425608c2aed2e7ec40"},"schema_version":"1.0","source":{"id":"2303.01854","kind":"arxiv","version":1}},"canonical_sha256":"b6461608c602b7cd1309098d3837f540e3a496961957b29d889695ed42a9a5ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b6461608c602b7cd1309098d3837f540e3a496961957b29d889695ed42a9a5ee","first_computed_at":"2026-07-05T05:47:50.037500Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:47:50.037500Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A86CMg+kMgZEeNlu3DoJtE0PXr8fHh9DC29m873LPMNC4zA/4qvry6eo2nKrGPBIleYItif5PVJhwiwQRDi+DA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:47:50.037932Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.01854","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:06ad9857197bbf493530fdfaab1a751fcf0061f4f0b1d206cfc6f293dffe25f4","sha256:ab40a078c4dcc920bdabf19daaaeb7a9fa60afa5b56f420c9a6bbde28294bd68"],"state_sha256":"9b0db4db1c3fdfbc0b9b21b897cc0b154570608914eb26e97db6ea2dd7415924"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xtD4igoELfK43IeHpjCJFv+o3C79U4xvRVuT4iuSssM4vvucablvPvRpszhCWHgOQ3nkUktNfRCelsSPxr/kBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-11T13:26:08.721136Z","bundle_sha256":"157f41bf7f1d61812cfa487724b6855050f1837a03ad860a2716d333e02647a2"}}