{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:THJYB6NNPES5DX5FZBDEGTJBAU","short_pith_number":"pith:THJYB6NN","canonical_record":{"source":{"id":"2602.17756","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-02-19T19:00:00Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"627bce0f32b757bb640b15661f27ce0b1a82c22199b6fbe5bc0ebde24bc1afae","abstract_canon_sha256":"b4e01a1143f4cf8669deb117dc97645cca4a9a95aaad03562fb79454aac2765f"},"schema_version":"1.0"},"canonical_sha256":"99d380f9ad7925d1dfa5c846434d210521a65a774cb46a12aa130091f4238742","source":{"kind":"arxiv","id":"2602.17756","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.17756","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"arxiv_version","alias_value":"2602.17756v2","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.17756","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"pith_short_12","alias_value":"THJYB6NNPES5","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"pith_short_16","alias_value":"THJYB6NNPES5DX5F","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"pith_short_8","alias_value":"THJYB6NN","created_at":"2026-07-13T01:20:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:THJYB6NNPES5DX5FZBDEGTJBAU","target":"record","payload":{"canonical_record":{"source":{"id":"2602.17756","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-02-19T19:00:00Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"627bce0f32b757bb640b15661f27ce0b1a82c22199b6fbe5bc0ebde24bc1afae","abstract_canon_sha256":"b4e01a1143f4cf8669deb117dc97645cca4a9a95aaad03562fb79454aac2765f"},"schema_version":"1.0"},"canonical_sha256":"99d380f9ad7925d1dfa5c846434d210521a65a774cb46a12aa130091f4238742","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-13T01:20:06.690880Z","signature_b64":"XoPLaXpz7+NXnlqXlDl9TesI0CBPR9971rtPkGuv3N/vI1oX/OwzzMySHDC9yszWcAZLSoqxh+gxywdOTliTCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99d380f9ad7925d1dfa5c846434d210521a65a774cb46a12aa130091f4238742","last_reissued_at":"2026-07-13T01:20:06.689371Z","signature_status":"signed_v1","first_computed_at":"2026-07-13T01:20:06.689371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2602.17756","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":"2026-07-13T01:20:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QKPMNEhg2sWyfOVJ0uKhmZA7Gf4h/AtTpqntYipC0qGGhpdkFPdAe+wGmepZBrWBb9I79rK1uOUL+Se8O0UjDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T18:47:30.639830Z"},"content_sha256":"0c3bdb8edc2443b40811aa1b9d0fcbd87b8a4fd56b81150dfc8c005b5124aebd","schema_version":"1.0","event_id":"sha256:0c3bdb8edc2443b40811aa1b9d0fcbd87b8a4fd56b81150dfc8c005b5124aebd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:THJYB6NNPES5DX5FZBDEGTJBAU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pushing spectral siren cosmology into the third-generation era: a blinded mock data challenge","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Alessandro Agapito, Daniele Bonacorsi, Francesco Pannarale, Matteo Tagliazucchi, Michele Mancarella, Michele Moresco, Nicola Borghi, Sarah Ferraiuolo, Simone Mastrogiovanni","submitted_at":"2026-02-19T19:00:00Z","abstract_excerpt":"Gravitational wave (GW) spectral sirens offer a promising method for measuring cosmological parameters using GW data only - without relying on external redshift information such as electromagnetic counterparts or galaxy catalogs - by exploiting distributional features in the population of GW sources. The advent of third-generation detectors like the Einstein Telescope (ET) will provide catalogs three orders of magnitudes larger than current ones, raising questions about the scalability and robustness of existing inference pipelines. We present a blinded mock data challenge that tests three pub"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.17756","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/2602.17756/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":"2026-07-13T01:20:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vohTHPETiWjGbg20L2eV+EBikMVyJfn0n/7/iVlC+2SixsxFMpJKOp17/7qb/Zf9Blo9GVDDuLIiBwGhH/txDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T18:47:30.640212Z"},"content_sha256":"b15360fea44b867f2b136b2828d0e57c6259303b464a3fb3ab40cd3b46c0423d","schema_version":"1.0","event_id":"sha256:b15360fea44b867f2b136b2828d0e57c6259303b464a3fb3ab40cd3b46c0423d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/THJYB6NNPES5DX5FZBDEGTJBAU/bundle.json","state_url":"https://pith.science/pith/THJYB6NNPES5DX5FZBDEGTJBAU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/THJYB6NNPES5DX5FZBDEGTJBAU/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":"2026-08-04T18:47:30Z","links":{"resolver":"https://pith.science/pith/THJYB6NNPES5DX5FZBDEGTJBAU","bundle":"https://pith.science/pith/THJYB6NNPES5DX5FZBDEGTJBAU/bundle.json","state":"https://pith.science/pith/THJYB6NNPES5DX5FZBDEGTJBAU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/THJYB6NNPES5DX5FZBDEGTJBAU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:THJYB6NNPES5DX5FZBDEGTJBAU","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":"b4e01a1143f4cf8669deb117dc97645cca4a9a95aaad03562fb79454aac2765f","cross_cats_sorted":["gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-02-19T19:00:00Z","title_canon_sha256":"627bce0f32b757bb640b15661f27ce0b1a82c22199b6fbe5bc0ebde24bc1afae"},"schema_version":"1.0","source":{"id":"2602.17756","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.17756","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"arxiv_version","alias_value":"2602.17756v2","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.17756","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"pith_short_12","alias_value":"THJYB6NNPES5","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"pith_short_16","alias_value":"THJYB6NNPES5DX5F","created_at":"2026-07-13T01:20:06Z"},{"alias_kind":"pith_short_8","alias_value":"THJYB6NN","created_at":"2026-07-13T01:20:06Z"}],"graph_snapshots":[{"event_id":"sha256:b15360fea44b867f2b136b2828d0e57c6259303b464a3fb3ab40cd3b46c0423d","target":"graph","created_at":"2026-07-13T01:20:06Z","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/2602.17756/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Gravitational wave (GW) spectral sirens offer a promising method for measuring cosmological parameters using GW data only - without relying on external redshift information such as electromagnetic counterparts or galaxy catalogs - by exploiting distributional features in the population of GW sources. The advent of third-generation detectors like the Einstein Telescope (ET) will provide catalogs three orders of magnitudes larger than current ones, raising questions about the scalability and robustness of existing inference pipelines. We present a blinded mock data challenge that tests three pub","authors_text":"Alessandro Agapito, Daniele Bonacorsi, Francesco Pannarale, Matteo Tagliazucchi, Michele Mancarella, Michele Moresco, Nicola Borghi, Sarah Ferraiuolo, Simone Mastrogiovanni","cross_cats":["gr-qc"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-02-19T19:00:00Z","title":"Pushing spectral siren cosmology into the third-generation era: a blinded mock data challenge"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.17756","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":"sha256:0c3bdb8edc2443b40811aa1b9d0fcbd87b8a4fd56b81150dfc8c005b5124aebd","target":"record","created_at":"2026-07-13T01:20:06Z","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":"b4e01a1143f4cf8669deb117dc97645cca4a9a95aaad03562fb79454aac2765f","cross_cats_sorted":["gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-02-19T19:00:00Z","title_canon_sha256":"627bce0f32b757bb640b15661f27ce0b1a82c22199b6fbe5bc0ebde24bc1afae"},"schema_version":"1.0","source":{"id":"2602.17756","kind":"arxiv","version":2}},"canonical_sha256":"99d380f9ad7925d1dfa5c846434d210521a65a774cb46a12aa130091f4238742","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99d380f9ad7925d1dfa5c846434d210521a65a774cb46a12aa130091f4238742","first_computed_at":"2026-07-13T01:20:06.689371Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-13T01:20:06.689371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XoPLaXpz7+NXnlqXlDl9TesI0CBPR9971rtPkGuv3N/vI1oX/OwzzMySHDC9yszWcAZLSoqxh+gxywdOTliTCg==","signature_status":"signed_v1","signed_at":"2026-07-13T01:20:06.690880Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.17756","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c3bdb8edc2443b40811aa1b9d0fcbd87b8a4fd56b81150dfc8c005b5124aebd","sha256:b15360fea44b867f2b136b2828d0e57c6259303b464a3fb3ab40cd3b46c0423d"],"state_sha256":"7c55ec3f66874ef9a548765a71d3d52047f02ed5c8c6e50761d5877745ea682f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C3dBwbCjxefNrSJCTFtzRdoq20NQO6ad3Ok7U1zrd/QrjZSeO4URdWEP0LzPTRV/yV2ryrTVAGWWUgeygqwqBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T18:47:30.642975Z","bundle_sha256":"30a2c9dcd30ad85565ca2ff53b2c764e723ddaf2cbaf11ae662710c5990c9135"}}