{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:ZLXRX3CNQFEI5FGMQPX7QOLRMX","short_pith_number":"pith:ZLXRX3CN","canonical_record":{"source":{"id":"2001.03721","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-01-11T06:53:20Z","cross_cats_sorted":[],"title_canon_sha256":"30ad25126e7435b86dda94d8dcd73827ff637f9687f0f15545fbbc76525a3e20","abstract_canon_sha256":"8ac54b19d5a67fce4e878b5ac173b7a6d9032b29d1a64116a82d6b43dcb7670f"},"schema_version":"1.0"},"canonical_sha256":"caef1bec4d81488e94cc83eff8397165c4c020b0555bf6a0ac1c6418d070d0fa","source":{"kind":"arxiv","id":"2001.03721","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.03721","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"arxiv_version","alias_value":"2001.03721v1","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.03721","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"pith_short_12","alias_value":"ZLXRX3CNQFEI","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"pith_short_16","alias_value":"ZLXRX3CNQFEI5FGM","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"pith_short_8","alias_value":"ZLXRX3CN","created_at":"2026-07-05T00:43:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:ZLXRX3CNQFEI5FGMQPX7QOLRMX","target":"record","payload":{"canonical_record":{"source":{"id":"2001.03721","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-01-11T06:53:20Z","cross_cats_sorted":[],"title_canon_sha256":"30ad25126e7435b86dda94d8dcd73827ff637f9687f0f15545fbbc76525a3e20","abstract_canon_sha256":"8ac54b19d5a67fce4e878b5ac173b7a6d9032b29d1a64116a82d6b43dcb7670f"},"schema_version":"1.0"},"canonical_sha256":"caef1bec4d81488e94cc83eff8397165c4c020b0555bf6a0ac1c6418d070d0fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:43:45.842840Z","signature_b64":"sJx6qSC33K/jKBS7v2Hv4MAgWfiWkG8eVl1iK1+fcbcZdboaAdEmprVXxnEP8sh7e4ZCx/KGkj65iUtDqEcBDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"caef1bec4d81488e94cc83eff8397165c4c020b0555bf6a0ac1c6418d070d0fa","last_reissued_at":"2026-07-05T00:43:45.842399Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:43:45.842399Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.03721","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":"2026-07-05T00:43:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mH0sLQ+9tOFQddLffH8RTN2cEWJ2CN6P2nEfxX4QevFncyufaHZNfkmXm9DVw9C/SWbn8wGhiDcpcXz89Bb7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T13:44:25.760011Z"},"content_sha256":"d61f0daf71082ac593961b7c33864355ad8be280e5f04114c43888c1e03c9b03","schema_version":"1.0","event_id":"sha256:d61f0daf71082ac593961b7c33864355ad8be280e5f04114c43888c1e03c9b03"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:ZLXRX3CNQFEI5FGMQPX7QOLRMX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comparative Study of Data-driven Solar Coronal Field Models Using a Flux Emergence Simulation as a Ground-truth Data Set","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Chaowei Jiang, Keiji Hayashi, Mark C.M. Cheung, Satoshi Inoue, Shinsuke Takasao, Shin Toriumi, Yang Guo","submitted_at":"2020-01-11T06:53:20Z","abstract_excerpt":"For a better understanding of magnetic field in the solar corona and dynamic activities such as flares and coronal mass ejections, it is crucial to measure the time-evolving coronal field and accurately estimate the magnetic energy. Recently, a new modeling technique called the data-driven coronal field model, in which the time evolution of magnetic field is driven by a sequence of photospheric magnetic and velocity field maps, has been developed and revealed the dynamics of flare-productive active regions. Here we report on the first qualitative and quantitative assessment of different data-d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.03721","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/2001.03721/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":"2026-07-05T00:43:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZB8C2jccXKZF6Vj7CY/q5ySD7dCNo9MAgrwbmEbIrEMp5F3hg39IrAA+XK1mibYjF66yaacv2FR+uZpFqacpAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T13:44:25.760392Z"},"content_sha256":"e1f9da11f6dd521e01f74fd05e8b37e0444cda4faa201ba1930c559e1d85eb15","schema_version":"1.0","event_id":"sha256:e1f9da11f6dd521e01f74fd05e8b37e0444cda4faa201ba1930c559e1d85eb15"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZLXRX3CNQFEI5FGMQPX7QOLRMX/bundle.json","state_url":"https://pith.science/pith/ZLXRX3CNQFEI5FGMQPX7QOLRMX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZLXRX3CNQFEI5FGMQPX7QOLRMX/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":"2026-08-19T13:44:25Z","links":{"resolver":"https://pith.science/pith/ZLXRX3CNQFEI5FGMQPX7QOLRMX","bundle":"https://pith.science/pith/ZLXRX3CNQFEI5FGMQPX7QOLRMX/bundle.json","state":"https://pith.science/pith/ZLXRX3CNQFEI5FGMQPX7QOLRMX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZLXRX3CNQFEI5FGMQPX7QOLRMX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ZLXRX3CNQFEI5FGMQPX7QOLRMX","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":"8ac54b19d5a67fce4e878b5ac173b7a6d9032b29d1a64116a82d6b43dcb7670f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-01-11T06:53:20Z","title_canon_sha256":"30ad25126e7435b86dda94d8dcd73827ff637f9687f0f15545fbbc76525a3e20"},"schema_version":"1.0","source":{"id":"2001.03721","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.03721","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"arxiv_version","alias_value":"2001.03721v1","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.03721","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"pith_short_12","alias_value":"ZLXRX3CNQFEI","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"pith_short_16","alias_value":"ZLXRX3CNQFEI5FGM","created_at":"2026-07-05T00:43:45Z"},{"alias_kind":"pith_short_8","alias_value":"ZLXRX3CN","created_at":"2026-07-05T00:43:45Z"}],"graph_snapshots":[{"event_id":"sha256:e1f9da11f6dd521e01f74fd05e8b37e0444cda4faa201ba1930c559e1d85eb15","target":"graph","created_at":"2026-07-05T00:43:45Z","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/2001.03721/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"For a better understanding of magnetic field in the solar corona and dynamic activities such as flares and coronal mass ejections, it is crucial to measure the time-evolving coronal field and accurately estimate the magnetic energy. Recently, a new modeling technique called the data-driven coronal field model, in which the time evolution of magnetic field is driven by a sequence of photospheric magnetic and velocity field maps, has been developed and revealed the dynamics of flare-productive active regions. Here we report on the first qualitative and quantitative assessment of different data-d","authors_text":"Chaowei Jiang, Keiji Hayashi, Mark C.M. Cheung, Satoshi Inoue, Shinsuke Takasao, Shin Toriumi, Yang Guo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-01-11T06:53:20Z","title":"Comparative Study of Data-driven Solar Coronal Field Models Using a Flux Emergence Simulation as a Ground-truth Data Set"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.03721","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:d61f0daf71082ac593961b7c33864355ad8be280e5f04114c43888c1e03c9b03","target":"record","created_at":"2026-07-05T00:43:45Z","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":"8ac54b19d5a67fce4e878b5ac173b7a6d9032b29d1a64116a82d6b43dcb7670f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-01-11T06:53:20Z","title_canon_sha256":"30ad25126e7435b86dda94d8dcd73827ff637f9687f0f15545fbbc76525a3e20"},"schema_version":"1.0","source":{"id":"2001.03721","kind":"arxiv","version":1}},"canonical_sha256":"caef1bec4d81488e94cc83eff8397165c4c020b0555bf6a0ac1c6418d070d0fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"caef1bec4d81488e94cc83eff8397165c4c020b0555bf6a0ac1c6418d070d0fa","first_computed_at":"2026-07-05T00:43:45.842399Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:43:45.842399Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sJx6qSC33K/jKBS7v2Hv4MAgWfiWkG8eVl1iK1+fcbcZdboaAdEmprVXxnEP8sh7e4ZCx/KGkj65iUtDqEcBDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:43:45.842840Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.03721","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d61f0daf71082ac593961b7c33864355ad8be280e5f04114c43888c1e03c9b03","sha256:e1f9da11f6dd521e01f74fd05e8b37e0444cda4faa201ba1930c559e1d85eb15"],"state_sha256":"7442d75ef3bdb216f03f6c46f8ce551842e13dd62d000e9548f28d4e64c98fe6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1FkNJAD6jG6R7U44RiNx20hKSxxbthwPXAycRGW0Wj8zeFPTowXz1z2hZMnHnDBFTQXkSfEmuklKCO871uwRCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T13:44:25.763320Z","bundle_sha256":"d8217bbfe0f46f5f81620ab2bdfd70867d1ffe43a74e4032cec9c91db549821c"}}