{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ITOVJWNIZZJISV62XBMQ2CP2O4","short_pith_number":"pith:ITOVJWNI","canonical_record":{"source":{"id":"1904.00700","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-01T11:21:50Z","cross_cats_sorted":[],"title_canon_sha256":"f6e8b36cfd7ab00eb8def1b28a73e3f790a5cc5e227d8c427462fa5f3fed5efc","abstract_canon_sha256":"7dbf15f8c09a7a36420f0e748d9c5427427cad92d38d5de6bb4d94877cdee855"},"schema_version":"1.0"},"canonical_sha256":"44dd54d9a8ce528957dab8590d09fa7732525253c12da3a9ddcb0d77dd06e405","source":{"kind":"arxiv","id":"1904.00700","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.00700","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"arxiv_version","alias_value":"1904.00700v2","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.00700","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"pith_short_12","alias_value":"ITOVJWNIZZJI","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"pith_short_16","alias_value":"ITOVJWNIZZJISV62","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"pith_short_8","alias_value":"ITOVJWNI","created_at":"2026-07-05T00:13:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ITOVJWNIZZJISV62XBMQ2CP2O4","target":"record","payload":{"canonical_record":{"source":{"id":"1904.00700","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-01T11:21:50Z","cross_cats_sorted":[],"title_canon_sha256":"f6e8b36cfd7ab00eb8def1b28a73e3f790a5cc5e227d8c427462fa5f3fed5efc","abstract_canon_sha256":"7dbf15f8c09a7a36420f0e748d9c5427427cad92d38d5de6bb4d94877cdee855"},"schema_version":"1.0"},"canonical_sha256":"44dd54d9a8ce528957dab8590d09fa7732525253c12da3a9ddcb0d77dd06e405","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:13:14.098720Z","signature_b64":"kxrngBKzxnoti+1a9lj45U+IxRspagiVEXNSE8TMJEhdaLYpg6E3qvHY8EPtlyoX8VJIWDziQkaNQ+k0KiGTDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"44dd54d9a8ce528957dab8590d09fa7732525253c12da3a9ddcb0d77dd06e405","last_reissued_at":"2026-07-05T00:13:14.098336Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:13:14.098336Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.00700","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:13:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pqdMXqgg7UJgBgIkrJ8HROQ/Ci66WHQLObl8IeKSz5cxAAJoyfs4nZit5w3emKu8fP6tv1hXMx1RYcOxjksrCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T15:21:06.554713Z"},"content_sha256":"4ff627fba22662da9fbc471533b6597e432353b82828264ebb83ee5b7b677034","schema_version":"1.0","event_id":"sha256:4ff627fba22662da9fbc471533b6597e432353b82828264ebb83ee5b7b677034"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ITOVJWNIZZJISV62XBMQ2CP2O4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-pressure synthesis of superhard and ultrahard materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alexandre Courac, Vladimir L. Solozhenko, Yann Le Godec","submitted_at":"2019-04-01T11:21:50Z","abstract_excerpt":"A brief overview on high-pressure synthesis of superhard and ultrahard materials is presented in this tutorial paper. Modern high-pressure chemistry represents a vast exciting area of research which can lead to new industrially important materials with exceptional mechanical properties. This field is only just beginning to realize its huge potential, and the image of \"terra incognita\" is not misused. We focus on three facets of this expanding research field by detailing: (i) the most promising chemical systems to explore (i.e. \"where to search\"); (ii) the various methodological strategies for "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00700","kind":"arxiv","version":2},"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/1904.00700/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":"2026-07-05T00:13:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BzMaCqfXNBTsUbcxlBswaaRmeQ8ecSDThljyNac2GIKj//6VOBjq1Alld9724sssMNh8JzFDQeIBSQYGHITuAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T15:21:06.555210Z"},"content_sha256":"45054bb524506987a0a7f37d68613382cc7b302af6f9304a0cba0af33b9baab6","schema_version":"1.0","event_id":"sha256:45054bb524506987a0a7f37d68613382cc7b302af6f9304a0cba0af33b9baab6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ITOVJWNIZZJISV62XBMQ2CP2O4/bundle.json","state_url":"https://pith.science/pith/ITOVJWNIZZJISV62XBMQ2CP2O4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ITOVJWNIZZJISV62XBMQ2CP2O4/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":"2026-08-22T15:21:06Z","links":{"resolver":"https://pith.science/pith/ITOVJWNIZZJISV62XBMQ2CP2O4","bundle":"https://pith.science/pith/ITOVJWNIZZJISV62XBMQ2CP2O4/bundle.json","state":"https://pith.science/pith/ITOVJWNIZZJISV62XBMQ2CP2O4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ITOVJWNIZZJISV62XBMQ2CP2O4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ITOVJWNIZZJISV62XBMQ2CP2O4","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":"7dbf15f8c09a7a36420f0e748d9c5427427cad92d38d5de6bb4d94877cdee855","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-01T11:21:50Z","title_canon_sha256":"f6e8b36cfd7ab00eb8def1b28a73e3f790a5cc5e227d8c427462fa5f3fed5efc"},"schema_version":"1.0","source":{"id":"1904.00700","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.00700","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"arxiv_version","alias_value":"1904.00700v2","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.00700","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"pith_short_12","alias_value":"ITOVJWNIZZJI","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"pith_short_16","alias_value":"ITOVJWNIZZJISV62","created_at":"2026-07-05T00:13:14Z"},{"alias_kind":"pith_short_8","alias_value":"ITOVJWNI","created_at":"2026-07-05T00:13:14Z"}],"graph_snapshots":[{"event_id":"sha256:45054bb524506987a0a7f37d68613382cc7b302af6f9304a0cba0af33b9baab6","target":"graph","created_at":"2026-07-05T00:13:14Z","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/1904.00700/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A brief overview on high-pressure synthesis of superhard and ultrahard materials is presented in this tutorial paper. Modern high-pressure chemistry represents a vast exciting area of research which can lead to new industrially important materials with exceptional mechanical properties. This field is only just beginning to realize its huge potential, and the image of \"terra incognita\" is not misused. We focus on three facets of this expanding research field by detailing: (i) the most promising chemical systems to explore (i.e. \"where to search\"); (ii) the various methodological strategies for ","authors_text":"Alexandre Courac, Vladimir L. Solozhenko, Yann Le Godec","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-01T11:21:50Z","title":"High-pressure synthesis of superhard and ultrahard materials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00700","kind":"arxiv","version":2},"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":"sha256:4ff627fba22662da9fbc471533b6597e432353b82828264ebb83ee5b7b677034","target":"record","created_at":"2026-07-05T00:13:14Z","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":"7dbf15f8c09a7a36420f0e748d9c5427427cad92d38d5de6bb4d94877cdee855","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-01T11:21:50Z","title_canon_sha256":"f6e8b36cfd7ab00eb8def1b28a73e3f790a5cc5e227d8c427462fa5f3fed5efc"},"schema_version":"1.0","source":{"id":"1904.00700","kind":"arxiv","version":2}},"canonical_sha256":"44dd54d9a8ce528957dab8590d09fa7732525253c12da3a9ddcb0d77dd06e405","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"44dd54d9a8ce528957dab8590d09fa7732525253c12da3a9ddcb0d77dd06e405","first_computed_at":"2026-07-05T00:13:14.098336Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:13:14.098336Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kxrngBKzxnoti+1a9lj45U+IxRspagiVEXNSE8TMJEhdaLYpg6E3qvHY8EPtlyoX8VJIWDziQkaNQ+k0KiGTDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:13:14.098720Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.00700","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ff627fba22662da9fbc471533b6597e432353b82828264ebb83ee5b7b677034","sha256:45054bb524506987a0a7f37d68613382cc7b302af6f9304a0cba0af33b9baab6"],"state_sha256":"e3fa9cd508cb6121f1a11d557a8eefb4e45d45d4338ffdcce31e13d58b63140f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xgQTLgn2Kv8tdTiMC4l+2bXPUdKN+wNbSOicrRm5JVxVHiC+jRNT9Nekg8Bhv9/+l8OgZ1Bj7og0oNJUR8NLAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T15:21:06.559758Z","bundle_sha256":"b8f9ef2dc764f596afb46abbcc9ed017f3d0d35c48652d61d8e8477c10a2f80e"}}