{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:HRR3F5CHQHQQXDA6XMCGBZI64L","short_pith_number":"pith:HRR3F5CH","canonical_record":{"source":{"id":"2607.02366","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-02T16:08:22Z","cross_cats_sorted":[],"title_canon_sha256":"6ff6624127d8aaeb2acf36c76d0648af929327be32002ddfc1fbaa2345d78f25","abstract_canon_sha256":"a200a51e5a6a8b82be7754161425da12f4c546279953b6980e1f24fc3201b0e3"},"schema_version":"1.0"},"canonical_sha256":"3c63b2f44781e10b8c1ebb0460e51ee2e04f4a5beb16bf78161ed536aa7b26b6","source":{"kind":"arxiv","id":"2607.02366","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.02366","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"arxiv_version","alias_value":"2607.02366v1","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.02366","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"pith_short_12","alias_value":"HRR3F5CHQHQQ","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"pith_short_16","alias_value":"HRR3F5CHQHQQXDA6","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"pith_short_8","alias_value":"HRR3F5CH","created_at":"2026-07-03T01:17:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:HRR3F5CHQHQQXDA6XMCGBZI64L","target":"record","payload":{"canonical_record":{"source":{"id":"2607.02366","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-02T16:08:22Z","cross_cats_sorted":[],"title_canon_sha256":"6ff6624127d8aaeb2acf36c76d0648af929327be32002ddfc1fbaa2345d78f25","abstract_canon_sha256":"a200a51e5a6a8b82be7754161425da12f4c546279953b6980e1f24fc3201b0e3"},"schema_version":"1.0"},"canonical_sha256":"3c63b2f44781e10b8c1ebb0460e51ee2e04f4a5beb16bf78161ed536aa7b26b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-03T01:17:56.895952Z","signature_b64":"eMLWNNIGdfP2+74lEazEvCeEr1uSPbQabVfWxtAh7RGUGsLboezhx/KRgoOcASJFoyS4XVGBTH/9zBqgns0CCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c63b2f44781e10b8c1ebb0460e51ee2e04f4a5beb16bf78161ed536aa7b26b6","last_reissued_at":"2026-07-03T01:17:56.895457Z","signature_status":"signed_v1","first_computed_at":"2026-07-03T01:17:56.895457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.02366","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":"2026-07-03T01:17:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hGBNZAOcnVj6PqTpoUWFPDdjtG+9lgtPyCSN9CiwV+4/Fra6eJx4p7sVKKrVCev8EHDY1CCbZkPMv+tSmZbkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T22:45:54.557046Z"},"content_sha256":"1f60f60d46329a3a88fb641e3d6170e5ba390608ecb7fe078a97ade0b3d73596","schema_version":"1.0","event_id":"sha256:1f60f60d46329a3a88fb641e3d6170e5ba390608ecb7fe078a97ade0b3d73596"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:HRR3F5CHQHQQXDA6XMCGBZI64L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Road to Identifying the Earliest Radio-Powerful AGN with the SKA","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alessandro Caccianiga, Alexander Hedge, Andrew Hopkins, Bruno Arsioli, Ciro Pappalardo, Davi Barbosa, Isabella Prandoni, Israel Matute, Jess W. Broderick, Jo\\~ao Tiago, Jose Afonso, Luca Ighina, Luis Barroso, Manuela Magliocchetti, Mojtaba Raouf, Nick Seymour, Nuno Covas, Pedro Martins, Rodrigo Carvajal, Ross J. Turner, Sabyasachi Pal, Stas Shabala, Stergios Amarantidis","submitted_at":"2026-07-02T16:08:22Z","abstract_excerpt":"The Epoch of Reionization (EoR) is one of the most pivotal frontiers in modern astrophysics, marking the emergence of the first galaxies, stars, and supermassive black holes (SMBHs). Despite insights from the Atacama Large Millimetre/submillimetre Array and the James Webb Space Telescope, we still struggle to explain how $\\sim10^{9}$ M$_\\odot$ SMBHs powering luminous active galactic nuclei (AGN) already exist by $z\\sim7$. The recent discovery of powerful radio emission from some of these early AGN is notable, offering new constraints on early black-hole accretion and, with the Square Kilometre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.02366","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/2607.02366/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":"2026-07-03T01:17:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qmluBETwQZZG6pvKReUA+Vuo92uc1DJmmxlr2lwCNSqOVOW9q7o6uQ8fTGIX6xAjCjNT8W8gmyTcHH6I5EPFCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T22:45:54.557735Z"},"content_sha256":"86d5a4615a09584ab3a777ffb25b6c52f79951ee202d2649f5053f44a5fc32dd","schema_version":"1.0","event_id":"sha256:86d5a4615a09584ab3a777ffb25b6c52f79951ee202d2649f5053f44a5fc32dd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HRR3F5CHQHQQXDA6XMCGBZI64L/bundle.json","state_url":"https://pith.science/pith/HRR3F5CHQHQQXDA6XMCGBZI64L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HRR3F5CHQHQQXDA6XMCGBZI64L/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":"2026-07-03T22:45:54Z","links":{"resolver":"https://pith.science/pith/HRR3F5CHQHQQXDA6XMCGBZI64L","bundle":"https://pith.science/pith/HRR3F5CHQHQQXDA6XMCGBZI64L/bundle.json","state":"https://pith.science/pith/HRR3F5CHQHQQXDA6XMCGBZI64L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HRR3F5CHQHQQXDA6XMCGBZI64L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:HRR3F5CHQHQQXDA6XMCGBZI64L","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":"a200a51e5a6a8b82be7754161425da12f4c546279953b6980e1f24fc3201b0e3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-02T16:08:22Z","title_canon_sha256":"6ff6624127d8aaeb2acf36c76d0648af929327be32002ddfc1fbaa2345d78f25"},"schema_version":"1.0","source":{"id":"2607.02366","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.02366","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"arxiv_version","alias_value":"2607.02366v1","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.02366","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"pith_short_12","alias_value":"HRR3F5CHQHQQ","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"pith_short_16","alias_value":"HRR3F5CHQHQQXDA6","created_at":"2026-07-03T01:17:56Z"},{"alias_kind":"pith_short_8","alias_value":"HRR3F5CH","created_at":"2026-07-03T01:17:56Z"}],"graph_snapshots":[{"event_id":"sha256:86d5a4615a09584ab3a777ffb25b6c52f79951ee202d2649f5053f44a5fc32dd","target":"graph","created_at":"2026-07-03T01:17:56Z","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/2607.02366/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Epoch of Reionization (EoR) is one of the most pivotal frontiers in modern astrophysics, marking the emergence of the first galaxies, stars, and supermassive black holes (SMBHs). Despite insights from the Atacama Large Millimetre/submillimetre Array and the James Webb Space Telescope, we still struggle to explain how $\\sim10^{9}$ M$_\\odot$ SMBHs powering luminous active galactic nuclei (AGN) already exist by $z\\sim7$. The recent discovery of powerful radio emission from some of these early AGN is notable, offering new constraints on early black-hole accretion and, with the Square Kilometre","authors_text":"Alessandro Caccianiga, Alexander Hedge, Andrew Hopkins, Bruno Arsioli, Ciro Pappalardo, Davi Barbosa, Isabella Prandoni, Israel Matute, Jess W. Broderick, Jo\\~ao Tiago, Jose Afonso, Luca Ighina, Luis Barroso, Manuela Magliocchetti, Mojtaba Raouf, Nick Seymour, Nuno Covas, Pedro Martins, Rodrigo Carvajal, Ross J. Turner, Sabyasachi Pal, Stas Shabala, Stergios Amarantidis","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-02T16:08:22Z","title":"The Road to Identifying the Earliest Radio-Powerful AGN with the SKA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.02366","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":"sha256:1f60f60d46329a3a88fb641e3d6170e5ba390608ecb7fe078a97ade0b3d73596","target":"record","created_at":"2026-07-03T01:17:56Z","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":"a200a51e5a6a8b82be7754161425da12f4c546279953b6980e1f24fc3201b0e3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-02T16:08:22Z","title_canon_sha256":"6ff6624127d8aaeb2acf36c76d0648af929327be32002ddfc1fbaa2345d78f25"},"schema_version":"1.0","source":{"id":"2607.02366","kind":"arxiv","version":1}},"canonical_sha256":"3c63b2f44781e10b8c1ebb0460e51ee2e04f4a5beb16bf78161ed536aa7b26b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c63b2f44781e10b8c1ebb0460e51ee2e04f4a5beb16bf78161ed536aa7b26b6","first_computed_at":"2026-07-03T01:17:56.895457Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-03T01:17:56.895457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eMLWNNIGdfP2+74lEazEvCeEr1uSPbQabVfWxtAh7RGUGsLboezhx/KRgoOcASJFoyS4XVGBTH/9zBqgns0CCg==","signature_status":"signed_v1","signed_at":"2026-07-03T01:17:56.895952Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.02366","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1f60f60d46329a3a88fb641e3d6170e5ba390608ecb7fe078a97ade0b3d73596","sha256:86d5a4615a09584ab3a777ffb25b6c52f79951ee202d2649f5053f44a5fc32dd"],"state_sha256":"c8d825151da991fb34178e47328b0228ff5b1d7082f06a86d8665d677a5ddeff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FT5bcAlxLOSvoUWvkFt3khlA3h4bqUCYiYyx/mM2kjApzfpYIZEC3ViYL3JClZATQ4T5G9pobxnj45EyJvMbCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-03T22:45:54.561898Z","bundle_sha256":"f2dfff517cb1225107d05f15ae8c4c422bd176296e1c848c5fb7afa277b9d94f"}}