{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:6GBIBLHOQ6VXRS4OSJFNJ2PU55","short_pith_number":"pith:6GBIBLHO","canonical_record":{"source":{"id":"2607.19500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2026-07-21T18:25:10Z","cross_cats_sorted":["cs.NA","physics.comp-ph"],"title_canon_sha256":"70e05a4461d79432185744cee22276d285d59d848270e8451585cf164cbc9d2b","abstract_canon_sha256":"dd84459aa55933c99a382a3002c9a2b8734c430763fcfb790292b26357bcb06f"},"schema_version":"1.0"},"canonical_sha256":"f18280acee87ab78cb8e924ad4e9f4ef5941f788ba875c817ce0f50dfdf80701","source":{"kind":"arxiv","id":"2607.19500","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.19500","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"arxiv_version","alias_value":"2607.19500v1","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.19500","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"pith_short_12","alias_value":"6GBIBLHOQ6VX","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"pith_short_16","alias_value":"6GBIBLHOQ6VXRS4O","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"pith_short_8","alias_value":"6GBIBLHO","created_at":"2026-07-23T00:23:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:6GBIBLHOQ6VXRS4OSJFNJ2PU55","target":"record","payload":{"canonical_record":{"source":{"id":"2607.19500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2026-07-21T18:25:10Z","cross_cats_sorted":["cs.NA","physics.comp-ph"],"title_canon_sha256":"70e05a4461d79432185744cee22276d285d59d848270e8451585cf164cbc9d2b","abstract_canon_sha256":"dd84459aa55933c99a382a3002c9a2b8734c430763fcfb790292b26357bcb06f"},"schema_version":"1.0"},"canonical_sha256":"f18280acee87ab78cb8e924ad4e9f4ef5941f788ba875c817ce0f50dfdf80701","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-23T00:23:53.395217Z","signature_b64":"/5sfufSmpepVYHyW3YaIwEop1K7Esge7k3pzQ0pk4rKE1fx40eHHhSmdFvdsQuwgdnZGnqYY8ecTuIdZ3WdEAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f18280acee87ab78cb8e924ad4e9f4ef5941f788ba875c817ce0f50dfdf80701","last_reissued_at":"2026-07-23T00:23:53.394367Z","signature_status":"signed_v1","first_computed_at":"2026-07-23T00:23:53.394367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.19500","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":"2026-07-23T00:23:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UHUnt+ooinkUCA/lRs83Wf3n9IP3n9xkgC+glm0C2/9XqEjCgiFLwj6/JvhaBjJ2f5asfsCQj3MTqMHXmgNQDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:35:40.816389Z"},"content_sha256":"a2b740cfb809aebe3e5c96e47e3b47c26c71faff3459ec07f0ec61ace7666de4","schema_version":"1.0","event_id":"sha256:a2b740cfb809aebe3e5c96e47e3b47c26c71faff3459ec07f0ec61ace7666de4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:6GBIBLHOQ6VXRS4OSJFNJ2PU55","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Robust Hierarchical Matrix Compression of Acoustic Volume and Boundary Integral Operators","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.NA","physics.comp-ph"],"primary_cat":"math.NA","authors_text":"Alberto Almuna-Morales, Danilo Aballay, Elwin van 't Wout, Ignacio Labarca-Figueroa","submitted_at":"2026-07-21T18:25:10Z","abstract_excerpt":"Discretizing integral formulations of the Helmholtz equation yields dense linear systems. Hence, simulating acoustic models at larger scales or higher frequencies is typically constrained by memory capacity. Fast algorithms, such as hierarchical matrix compression, reduce the memory footprint substantially while controlling the approximation error in matrix-vector multiplications. However, the commonly used Adaptive Cross Approximation suffers from early-convergence problems, where the iterative construction of low-rank decompositions stops before reaching the targeted error tolerance. This fa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.19500","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/2607.19500/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":"2026-07-23T00:23:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"icXAnz4MMP0ZtO+uVgBw/IdbalXXYjQ45opMfZiEllm7lwEwbPOVUzZ2Uzwy5RElbHDzSMX6Eo2L4yGEZElsAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:35:40.817225Z"},"content_sha256":"29ef7dda05675d0b657b6db2c650ef021f9d3ff9dd583f99daa36acb5d2f4d70","schema_version":"1.0","event_id":"sha256:29ef7dda05675d0b657b6db2c650ef021f9d3ff9dd583f99daa36acb5d2f4d70"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:6GBIBLHOQ6VXRS4OSJFNJ2PU55","target":"integrity","payload":{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. A longer candidate (10.1007/978-3-319-28832-1_9) was visible in the surrounding text but could not be confirmed against doi.org as printed.","snippet":"Timo Betcke, Elwin van ’t Wout, and Pierre G´ elat. “Computationally Effi- cient Boundary Element Methods for High-Frequency Helmholtz Problems in Unbounded Domains”. In:Modern Solvers for Helmholtz Problems. Ed. by Domenico Lahaye, Jok Tan","arxiv_id":"2607.19500","detector":"doi_compliance","evidence":{"ref_index":24,"verdict_class":"incontrovertible","resolved_title":null,"printed_excerpt":"10.1007/978-3-319-28832-","reconstructed_doi":"10.1007/978-3-319-28832-1_9"},"severity":"advisory","ref_index":24,"audited_at":"2026-08-01T12:49:20.960544Z","event_type":"pith.integrity.v1","detected_doi":"10.1007/978-3-319-28832-1_9","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"2da18acc6cedb06eaf0a44d0c422d3f5dfc6b4f0ae03a9bd0d26c9d4daa8039e","paper_version":1,"verdict_class":"incontrovertible","resolved_title":null,"detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":15826,"payload_sha256":"c40e525febc5bc2627d075e0185a39412139cfc2a5588b334ceacd6b56531515","signature_b64":"IYiSfTdzgsT53ffvd21Ls3YchTsEoLLoi4oVwoVlQ/f1QjHCU6gxjrgiqo9XZ+sOAooycWGlfGnpbclmTpGgAg==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T12:53:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rFQ++xzUEHwoYiqAz9ojW2O0PrtF9bK092KTb0LW8qA8/c5eWv1tpiX96eN7Z+f8l3pwIP2pp3QszPCBo6wfCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:35:40.826141Z"},"content_sha256":"9076039e2a3950b9be02789c3678d9a3f48799281caacd94757be4acd5071f20","schema_version":"1.0","event_id":"sha256:9076039e2a3950b9be02789c3678d9a3f48799281caacd94757be4acd5071f20"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:6GBIBLHOQ6VXRS4OSJFNJ2PU55","target":"integrity","payload":{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. A longer candidate (10.1007/s00211-017-0873-y) was visible in the surrounding text but could not be confirmed against doi.org as printed.","snippet":"Steffen B¨ orm and Jens M Melenk. “Approximation of the high-frequency Helmholtz kernel by nested directional interpolation: error analysis”. In: Numerische Mathematik137.1 (2017), pp. 1–34.doi:10.1007/s00211- 017-0873-y","arxiv_id":"2607.19500","detector":"doi_compliance","evidence":{"ref_index":22,"verdict_class":"incontrovertible","resolved_title":null,"printed_excerpt":"10.1007/s00211-","reconstructed_doi":"10.1007/s00211-017-0873-y"},"severity":"advisory","ref_index":22,"audited_at":"2026-08-01T12:49:20.960544Z","event_type":"pith.integrity.v1","detected_doi":"10.1007/s00211-017-0873-y","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"4df58aa0dc1a5cc39b0d1bc1aad340b24c8cbe8a5d1d7f0f5f008e291c90e277","paper_version":1,"verdict_class":"incontrovertible","resolved_title":null,"detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":15825,"payload_sha256":"5da9de3d116df28f305f6db79be2ea64c46605d0a0bf6d845638ffe5d13d5773","signature_b64":"Cb05XeiII5Ur6uwL5tmWRwcD9wV9mb+DCp1BtG2WfGRLag88H/2FYX1TbdgMfxMOisKK7dYPIBO3b99/fSZmAQ==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T12:53:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UHN+MLJ+z8ucrzQ6nUw04oss9qkO7dgT8Hs0mmC/FUIUgFr81Rkc2FZGQLx82tCgVO1zlHno+x+bofTedIBeDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:35:40.826543Z"},"content_sha256":"a687650417f35513cc084b8cdd61a023d0c528c1b47c396ded6209dc7ab55258","schema_version":"1.0","event_id":"sha256:a687650417f35513cc084b8cdd61a023d0c528c1b47c396ded6209dc7ab55258"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:6GBIBLHOQ6VXRS4OSJFNJ2PU55","target":"integrity","payload":{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. A longer candidate (10.1007/978-3-540-77147-0) was visible in the surrounding text but could not be confirmed against doi.org as printed.","snippet":"Mario Bebendorf.Hierarchical Matrices: A Means to Efficiently Solve El- liptic Boundary Value Problems. Vol. 63. Lecture Notes in Computational Science and Engineering. Berlin: Springer, 2008.doi:10.1007/978- 3- 540-77147-0","arxiv_id":"2607.19500","detector":"doi_compliance","evidence":{"ref_index":19,"verdict_class":"incontrovertible","resolved_title":null,"printed_excerpt":"10.1007/978-","reconstructed_doi":"10.1007/978-3-540-77147-0"},"severity":"advisory","ref_index":19,"audited_at":"2026-08-01T12:49:20.960544Z","event_type":"pith.integrity.v1","detected_doi":"10.1007/978-3-540-77147-0","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"a0536cde531fbe0e9ded0bd99f5405b1659ba76dbbccaed7b473915dafdc831d","paper_version":1,"verdict_class":"incontrovertible","resolved_title":null,"detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":15824,"payload_sha256":"2d66122b7c35245864daa0ad4d77db382641124db25377f87a61a3cdbb3691e4","signature_b64":"bN/N/5um18Gv7a1soMd80nwxj7jSzWhNASxbmvJzCairr0vk2YRaqECBwUevY/TewDGURQCMQo+tI0fchliWBA==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T12:53:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VJaxKuzIEzP8WLn+PPOdu8T+JWumTvwLT+CmFXObGko2PY0trUh8BjpLHj3u3NOb/WsS0omzxDvUn4K7kiSADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:35:40.826976Z"},"content_sha256":"135313b9d4625db109a6fa8ea559784278f9fcab88d8182fb24ca7b9bbb47d08","schema_version":"1.0","event_id":"sha256:135313b9d4625db109a6fa8ea559784278f9fcab88d8182fb24ca7b9bbb47d08"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6GBIBLHOQ6VXRS4OSJFNJ2PU55/bundle.json","state_url":"https://pith.science/pith/6GBIBLHOQ6VXRS4OSJFNJ2PU55/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6GBIBLHOQ6VXRS4OSJFNJ2PU55/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":"2026-08-05T22:35:40Z","links":{"resolver":"https://pith.science/pith/6GBIBLHOQ6VXRS4OSJFNJ2PU55","bundle":"https://pith.science/pith/6GBIBLHOQ6VXRS4OSJFNJ2PU55/bundle.json","state":"https://pith.science/pith/6GBIBLHOQ6VXRS4OSJFNJ2PU55/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6GBIBLHOQ6VXRS4OSJFNJ2PU55/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:6GBIBLHOQ6VXRS4OSJFNJ2PU55","merge_version":"pith-open-graph-merge-v1","event_count":5,"valid_event_count":5,"invalid_event_count":0,"equivocation_count":1,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"dd84459aa55933c99a382a3002c9a2b8734c430763fcfb790292b26357bcb06f","cross_cats_sorted":["cs.NA","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2026-07-21T18:25:10Z","title_canon_sha256":"70e05a4461d79432185744cee22276d285d59d848270e8451585cf164cbc9d2b"},"schema_version":"1.0","source":{"id":"2607.19500","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.19500","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"arxiv_version","alias_value":"2607.19500v1","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.19500","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"pith_short_12","alias_value":"6GBIBLHOQ6VX","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"pith_short_16","alias_value":"6GBIBLHOQ6VXRS4O","created_at":"2026-07-23T00:23:53Z"},{"alias_kind":"pith_short_8","alias_value":"6GBIBLHO","created_at":"2026-07-23T00:23:53Z"}],"graph_snapshots":[{"event_id":"sha256:29ef7dda05675d0b657b6db2c650ef021f9d3ff9dd583f99daa36acb5d2f4d70","target":"graph","created_at":"2026-07-23T00:23:53Z","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/2607.19500/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Discretizing integral formulations of the Helmholtz equation yields dense linear systems. Hence, simulating acoustic models at larger scales or higher frequencies is typically constrained by memory capacity. Fast algorithms, such as hierarchical matrix compression, reduce the memory footprint substantially while controlling the approximation error in matrix-vector multiplications. However, the commonly used Adaptive Cross Approximation suffers from early-convergence problems, where the iterative construction of low-rank decompositions stops before reaching the targeted error tolerance. This fa","authors_text":"Alberto Almuna-Morales, Danilo Aballay, Elwin van 't Wout, Ignacio Labarca-Figueroa","cross_cats":["cs.NA","physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2026-07-21T18:25:10Z","title":"Robust Hierarchical Matrix Compression of Acoustic Volume and Boundary Integral Operators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.19500","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:a2b740cfb809aebe3e5c96e47e3b47c26c71faff3459ec07f0ec61ace7666de4","target":"record","created_at":"2026-07-23T00:23:53Z","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":"dd84459aa55933c99a382a3002c9a2b8734c430763fcfb790292b26357bcb06f","cross_cats_sorted":["cs.NA","physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2026-07-21T18:25:10Z","title_canon_sha256":"70e05a4461d79432185744cee22276d285d59d848270e8451585cf164cbc9d2b"},"schema_version":"1.0","source":{"id":"2607.19500","kind":"arxiv","version":1}},"canonical_sha256":"f18280acee87ab78cb8e924ad4e9f4ef5941f788ba875c817ce0f50dfdf80701","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f18280acee87ab78cb8e924ad4e9f4ef5941f788ba875c817ce0f50dfdf80701","first_computed_at":"2026-07-23T00:23:53.394367Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-23T00:23:53.394367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/5sfufSmpepVYHyW3YaIwEop1K7Esge7k3pzQ0pk4rKE1fx40eHHhSmdFvdsQuwgdnZGnqYY8ecTuIdZ3WdEAw==","signature_status":"signed_v1","signed_at":"2026-07-23T00:23:53.395217Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.19500","source_kind":"arxiv","source_version":1}}},"equivocations":[{"signer_id":"pith.science","event_type":"integrity_finding","target":"integrity","event_ids":["sha256:135313b9d4625db109a6fa8ea559784278f9fcab88d8182fb24ca7b9bbb47d08","sha256:9076039e2a3950b9be02789c3678d9a3f48799281caacd94757be4acd5071f20","sha256:a687650417f35513cc084b8cdd61a023d0c528c1b47c396ded6209dc7ab55258"]}],"invalid_events":[],"applied_event_ids":["sha256:a2b740cfb809aebe3e5c96e47e3b47c26c71faff3459ec07f0ec61ace7666de4","sha256:29ef7dda05675d0b657b6db2c650ef021f9d3ff9dd583f99daa36acb5d2f4d70"],"state_sha256":"c84ae06f94b983ad72314b36cbbb522bdec189d034fadc4ae4fecc03764d9a90"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"guwy0A527gvbVngTtPgLtidmbVdVC6ANiL+6E3dfTR/qGtgjPvH3wTBTFw9pUPx57s73QT8xmaQ36EiFT+MOAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T22:35:40.830808Z","bundle_sha256":"4faea1f4d67873c6610489bc18a23bd38684faf4e122162bba245fde5f811825"}}