{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:I4SQ6XZL5SOU4XR43TISJ4EK7X","short_pith_number":"pith:I4SQ6XZL","canonical_record":{"source":{"id":"2606.25564","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-06-24T08:40:02Z","cross_cats_sorted":[],"title_canon_sha256":"e33a1e0f938b93481faab3dc88c9e90df29747b6ecfc9ecc56cd8eff0ff4e4be","abstract_canon_sha256":"839a49bce16a4cf58cdf5a0bbbfc1b53c38a0b5f3470b9c6f98a00baf925985d"},"schema_version":"1.0"},"canonical_sha256":"47250f5f2bec9d4e5e3cdcd124f08afdfb246d27257ea7356b92557ae6843aed","source":{"kind":"arxiv","id":"2606.25564","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.25564","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"arxiv_version","alias_value":"2606.25564v1","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.25564","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"pith_short_12","alias_value":"I4SQ6XZL5SOU","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"pith_short_16","alias_value":"I4SQ6XZL5SOU4XR4","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"pith_short_8","alias_value":"I4SQ6XZL","created_at":"2026-06-25T01:18:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:I4SQ6XZL5SOU4XR43TISJ4EK7X","target":"record","payload":{"canonical_record":{"source":{"id":"2606.25564","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-06-24T08:40:02Z","cross_cats_sorted":[],"title_canon_sha256":"e33a1e0f938b93481faab3dc88c9e90df29747b6ecfc9ecc56cd8eff0ff4e4be","abstract_canon_sha256":"839a49bce16a4cf58cdf5a0bbbfc1b53c38a0b5f3470b9c6f98a00baf925985d"},"schema_version":"1.0"},"canonical_sha256":"47250f5f2bec9d4e5e3cdcd124f08afdfb246d27257ea7356b92557ae6843aed","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-25T01:18:08.921926Z","signature_b64":"WwpiGvdaCqhIs+yRjp9qxtNlhDpmKhIY/Z79OoqAqSk9AZtUR02ysRmLFimiiJt2T+H57iel3MOwxRKG3vjsAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47250f5f2bec9d4e5e3cdcd124f08afdfb246d27257ea7356b92557ae6843aed","last_reissued_at":"2026-06-25T01:18:08.921436Z","signature_status":"signed_v1","first_computed_at":"2026-06-25T01:18:08.921436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.25564","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":"2026-06-25T01:18:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"we8lfGSizgxM4dJjJ62qD7DhCGJw6zk0AIXsgeZrxARfw7u1m0OKL+CsRzmntgaLlUKIca2Lu7MH7C74B4ukCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T13:35:45.345756Z"},"content_sha256":"c271c785f9849b1dc95feb5b381787ceb6d4e2c80d9463dc1488d25c653d70a9","schema_version":"1.0","event_id":"sha256:c271c785f9849b1dc95feb5b381787ceb6d4e2c80d9463dc1488d25c653d70a9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:I4SQ6XZL5SOU4XR43TISJ4EK7X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Developing fast, accurate and spin pure calculations of organic diradical electronic structure","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Hugh G. A. Burton, Joseph T. Kielty, Timothy J. H. Hele","submitted_at":"2026-06-24T08:40:02Z","abstract_excerpt":"Organic diradical molecules have emerged in recent years as highly promising candidates for next generation optoelectronic and quantum information technologies. As efforts continue to synthesise diradicals with unique photophysical properties, developing our theoretical understanding of their complex electronic structure is crucial to enable rational design strategies. However, existing computational tools struggle to properly describe the multi-reference character of diradical electronic states while also preserving a low computational scaling that enables fast calculations on large emissive "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.25564","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/2606.25564/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":"2026-06-25T01:18:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1Nrn+HC9CeOLAbWyhhbKlw4DMLohiEyDS9PjE8UkMcpeVu8CgxVWWQnKVndV4x45O3D1ga7uCuzN9M5M6To3AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T13:35:45.346138Z"},"content_sha256":"e9bde4747d6017c656b191ba465f2985a243c093c89f639aba818da26fba077b","schema_version":"1.0","event_id":"sha256:e9bde4747d6017c656b191ba465f2985a243c093c89f639aba818da26fba077b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I4SQ6XZL5SOU4XR43TISJ4EK7X/bundle.json","state_url":"https://pith.science/pith/I4SQ6XZL5SOU4XR43TISJ4EK7X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I4SQ6XZL5SOU4XR43TISJ4EK7X/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":"2026-06-29T13:35:45Z","links":{"resolver":"https://pith.science/pith/I4SQ6XZL5SOU4XR43TISJ4EK7X","bundle":"https://pith.science/pith/I4SQ6XZL5SOU4XR43TISJ4EK7X/bundle.json","state":"https://pith.science/pith/I4SQ6XZL5SOU4XR43TISJ4EK7X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I4SQ6XZL5SOU4XR43TISJ4EK7X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:I4SQ6XZL5SOU4XR43TISJ4EK7X","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":"839a49bce16a4cf58cdf5a0bbbfc1b53c38a0b5f3470b9c6f98a00baf925985d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-06-24T08:40:02Z","title_canon_sha256":"e33a1e0f938b93481faab3dc88c9e90df29747b6ecfc9ecc56cd8eff0ff4e4be"},"schema_version":"1.0","source":{"id":"2606.25564","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.25564","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"arxiv_version","alias_value":"2606.25564v1","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.25564","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"pith_short_12","alias_value":"I4SQ6XZL5SOU","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"pith_short_16","alias_value":"I4SQ6XZL5SOU4XR4","created_at":"2026-06-25T01:18:08Z"},{"alias_kind":"pith_short_8","alias_value":"I4SQ6XZL","created_at":"2026-06-25T01:18:08Z"}],"graph_snapshots":[{"event_id":"sha256:e9bde4747d6017c656b191ba465f2985a243c093c89f639aba818da26fba077b","target":"graph","created_at":"2026-06-25T01:18:08Z","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/2606.25564/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Organic diradical molecules have emerged in recent years as highly promising candidates for next generation optoelectronic and quantum information technologies. As efforts continue to synthesise diradicals with unique photophysical properties, developing our theoretical understanding of their complex electronic structure is crucial to enable rational design strategies. However, existing computational tools struggle to properly describe the multi-reference character of diradical electronic states while also preserving a low computational scaling that enables fast calculations on large emissive ","authors_text":"Hugh G. A. Burton, Joseph T. Kielty, Timothy J. H. Hele","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-06-24T08:40:02Z","title":"Developing fast, accurate and spin pure calculations of organic diradical electronic structure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.25564","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:c271c785f9849b1dc95feb5b381787ceb6d4e2c80d9463dc1488d25c653d70a9","target":"record","created_at":"2026-06-25T01:18:08Z","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":"839a49bce16a4cf58cdf5a0bbbfc1b53c38a0b5f3470b9c6f98a00baf925985d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-06-24T08:40:02Z","title_canon_sha256":"e33a1e0f938b93481faab3dc88c9e90df29747b6ecfc9ecc56cd8eff0ff4e4be"},"schema_version":"1.0","source":{"id":"2606.25564","kind":"arxiv","version":1}},"canonical_sha256":"47250f5f2bec9d4e5e3cdcd124f08afdfb246d27257ea7356b92557ae6843aed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47250f5f2bec9d4e5e3cdcd124f08afdfb246d27257ea7356b92557ae6843aed","first_computed_at":"2026-06-25T01:18:08.921436Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-25T01:18:08.921436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WwpiGvdaCqhIs+yRjp9qxtNlhDpmKhIY/Z79OoqAqSk9AZtUR02ysRmLFimiiJt2T+H57iel3MOwxRKG3vjsAA==","signature_status":"signed_v1","signed_at":"2026-06-25T01:18:08.921926Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.25564","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c271c785f9849b1dc95feb5b381787ceb6d4e2c80d9463dc1488d25c653d70a9","sha256:e9bde4747d6017c656b191ba465f2985a243c093c89f639aba818da26fba077b"],"state_sha256":"abef85bd15b38ba7d7a984ec8c77e82b3f8729ea234431d2552089be4ebaf4e2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lrTfxaq8kiC4g4igO96m12M5eORDrHbS5pT0Y6AcIQlX4Hvs2j1CQ83hsUJ3yl5j9/mXUVr6DIsz+vUvmxm1Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T13:35:45.348002Z","bundle_sha256":"2874d5e01a4a7d71bfadb720d626f5e5c0aa1f2ea6d7d16011fa93aa4a3b4458"}}