{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:S2NUY6N52IFVPS6N32CORLI7CX","short_pith_number":"pith:S2NUY6N5","canonical_record":{"source":{"id":"2607.21872","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-24T00:08:22Z","cross_cats_sorted":[],"title_canon_sha256":"4a9f275f1bdc49f000746f3869471fd666e9a1f7606cca3d37c9f067a45184ec","abstract_canon_sha256":"8aa6493648d9b229bebebb0d9b7ac1eb95f3ab47d2f8b5f7398fe22b6e260ca0"},"schema_version":"1.0"},"canonical_sha256":"969b4c79bdd20b57cbcdde84e8ad1f15ef448fb6b5b89107c3e0916cf2d8f53a","source":{"kind":"arxiv","id":"2607.21872","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.21872","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"arxiv_version","alias_value":"2607.21872v1","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21872","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"pith_short_12","alias_value":"S2NUY6N52IFV","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"pith_short_16","alias_value":"S2NUY6N52IFVPS6N","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"pith_short_8","alias_value":"S2NUY6N5","created_at":"2026-07-27T00:20:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:S2NUY6N52IFVPS6N32CORLI7CX","target":"record","payload":{"canonical_record":{"source":{"id":"2607.21872","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-24T00:08:22Z","cross_cats_sorted":[],"title_canon_sha256":"4a9f275f1bdc49f000746f3869471fd666e9a1f7606cca3d37c9f067a45184ec","abstract_canon_sha256":"8aa6493648d9b229bebebb0d9b7ac1eb95f3ab47d2f8b5f7398fe22b6e260ca0"},"schema_version":"1.0"},"canonical_sha256":"969b4c79bdd20b57cbcdde84e8ad1f15ef448fb6b5b89107c3e0916cf2d8f53a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-27T00:20:25.708648Z","signature_b64":"oEfNPSSZ1QJy7AiMeBlM1nxLqzzBXICjWKT5i84Ds8X/l9vyj+QdPb4A1Expc9MTE+EFs1EiYB4TGArEWs2DAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"969b4c79bdd20b57cbcdde84e8ad1f15ef448fb6b5b89107c3e0916cf2d8f53a","last_reissued_at":"2026-07-27T00:20:25.707833Z","signature_status":"signed_v1","first_computed_at":"2026-07-27T00:20:25.707833Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.21872","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":"2026-07-27T00:20:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZDvjWLOuMiR88OYrFA47Vzy+wy4t8RtuzM/1OTzoi0A/TGfC5YHrCSpK3tAxIZ/rn1IApVuUHmN1PckuJVGEAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T22:47:50.839546Z"},"content_sha256":"bd6b3cf588da93e0c530f87a56323b386452c8d73fcd61dd1829847ef063da3e","schema_version":"1.0","event_id":"sha256:bd6b3cf588da93e0c530f87a56323b386452c8d73fcd61dd1829847ef063da3e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:S2NUY6N52IFVPS6N32CORLI7CX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Crystallization of pristine cubic ice from liquid at ambient pressure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Aasim I. Shaffi, Adam J. Clancy, Camilla Di Mino, Chenwei Zheng, Christopher A. Howard, Christoph G. Salzmann, Marta Falkowska, Milz L. Beaumont, Miroslava Novoveska, Neal T. Skipper, Paul F. Henry, Sanghamitra Mukhopadhyay, Tom F. Headen, Yidan Wang","submitted_at":"2026-07-24T00:08:22Z","abstract_excerpt":"The phase diagram of frozen water is famously rich: to date, over twenty crystalline polymorphs have been identified. Of the low-pressure 'ice I' family, hexagonal (Ih) is the principal form on Earth, while cubic (Ic) is much more elusive. Fundamental questions remain open as to whether cubic ice Ic can form directly from the liquid state, its thermodynamic stability and natural occurrence. Here we show that pristine cubic ice Ic can be formed at atmospheric pressure simply by cooling an aqueous solution confined within mesoporous silica. Using primarily neutron scattering, we show unambiguous"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21872","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/2607.21872/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":"2026-07-27T00:20:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aRDIQHlabv2GGjWz1jXRAqtd5Cf7p3MHm/8UOLRJd04TIjHrTYo8y3Jvfvdb7+uAyH8F2Ti6wCkYzorBfj1FAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T22:47:50.840041Z"},"content_sha256":"46df3bd97f742fa474729b22c1dcba788399ad005a75a68a0d28dbdc1b781b17","schema_version":"1.0","event_id":"sha256:46df3bd97f742fa474729b22c1dcba788399ad005a75a68a0d28dbdc1b781b17"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/S2NUY6N52IFVPS6N32CORLI7CX/bundle.json","state_url":"https://pith.science/pith/S2NUY6N52IFVPS6N32CORLI7CX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/S2NUY6N52IFVPS6N32CORLI7CX/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":"2026-08-08T22:47:50Z","links":{"resolver":"https://pith.science/pith/S2NUY6N52IFVPS6N32CORLI7CX","bundle":"https://pith.science/pith/S2NUY6N52IFVPS6N32CORLI7CX/bundle.json","state":"https://pith.science/pith/S2NUY6N52IFVPS6N32CORLI7CX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/S2NUY6N52IFVPS6N32CORLI7CX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:S2NUY6N52IFVPS6N32CORLI7CX","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":"8aa6493648d9b229bebebb0d9b7ac1eb95f3ab47d2f8b5f7398fe22b6e260ca0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-24T00:08:22Z","title_canon_sha256":"4a9f275f1bdc49f000746f3869471fd666e9a1f7606cca3d37c9f067a45184ec"},"schema_version":"1.0","source":{"id":"2607.21872","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.21872","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"arxiv_version","alias_value":"2607.21872v1","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21872","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"pith_short_12","alias_value":"S2NUY6N52IFV","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"pith_short_16","alias_value":"S2NUY6N52IFVPS6N","created_at":"2026-07-27T00:20:25Z"},{"alias_kind":"pith_short_8","alias_value":"S2NUY6N5","created_at":"2026-07-27T00:20:25Z"}],"graph_snapshots":[{"event_id":"sha256:46df3bd97f742fa474729b22c1dcba788399ad005a75a68a0d28dbdc1b781b17","target":"graph","created_at":"2026-07-27T00:20:25Z","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/2607.21872/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The phase diagram of frozen water is famously rich: to date, over twenty crystalline polymorphs have been identified. Of the low-pressure 'ice I' family, hexagonal (Ih) is the principal form on Earth, while cubic (Ic) is much more elusive. Fundamental questions remain open as to whether cubic ice Ic can form directly from the liquid state, its thermodynamic stability and natural occurrence. Here we show that pristine cubic ice Ic can be formed at atmospheric pressure simply by cooling an aqueous solution confined within mesoporous silica. Using primarily neutron scattering, we show unambiguous","authors_text":"Aasim I. Shaffi, Adam J. Clancy, Camilla Di Mino, Chenwei Zheng, Christopher A. Howard, Christoph G. Salzmann, Marta Falkowska, Milz L. Beaumont, Miroslava Novoveska, Neal T. Skipper, Paul F. Henry, Sanghamitra Mukhopadhyay, Tom F. Headen, Yidan Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-24T00:08:22Z","title":"Crystallization of pristine cubic ice from liquid at ambient pressure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21872","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:bd6b3cf588da93e0c530f87a56323b386452c8d73fcd61dd1829847ef063da3e","target":"record","created_at":"2026-07-27T00:20:25Z","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":"8aa6493648d9b229bebebb0d9b7ac1eb95f3ab47d2f8b5f7398fe22b6e260ca0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-24T00:08:22Z","title_canon_sha256":"4a9f275f1bdc49f000746f3869471fd666e9a1f7606cca3d37c9f067a45184ec"},"schema_version":"1.0","source":{"id":"2607.21872","kind":"arxiv","version":1}},"canonical_sha256":"969b4c79bdd20b57cbcdde84e8ad1f15ef448fb6b5b89107c3e0916cf2d8f53a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"969b4c79bdd20b57cbcdde84e8ad1f15ef448fb6b5b89107c3e0916cf2d8f53a","first_computed_at":"2026-07-27T00:20:25.707833Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-27T00:20:25.707833Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oEfNPSSZ1QJy7AiMeBlM1nxLqzzBXICjWKT5i84Ds8X/l9vyj+QdPb4A1Expc9MTE+EFs1EiYB4TGArEWs2DAQ==","signature_status":"signed_v1","signed_at":"2026-07-27T00:20:25.708648Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.21872","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd6b3cf588da93e0c530f87a56323b386452c8d73fcd61dd1829847ef063da3e","sha256:46df3bd97f742fa474729b22c1dcba788399ad005a75a68a0d28dbdc1b781b17"],"state_sha256":"bea1b4d8b49d300cef8f2c146f164b1684757665e418b7eba3686568a7397d1a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7ssqqwo7DIQrhebYNy+fCTQccyLBoqH9hpaYMJHVjDIPkTYbXvpFMbmNobZFE3fpR4hFKK7Tkl6FQ2Vxb16oDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T22:47:50.844868Z","bundle_sha256":"6549e41873350fcbe9c7ad04e1ffbb124136be66dbc307021c1ad92f3afaf78a"}}