{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:JBRAY6745AYX5AWAUSS5UE7FSL","short_pith_number":"pith:JBRAY674","canonical_record":{"source":{"id":"1612.07264","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-21T18:30:49Z","cross_cats_sorted":[],"title_canon_sha256":"16074a729984b7413846bacff5ce3f19a7b7f292444470f240a57ea7f0290a76","abstract_canon_sha256":"75bbb7c2d37d1c80675076c8aec9d507d23ae7794e559a0360d5f21d2673405e"},"schema_version":"1.0"},"canonical_sha256":"48620c7bfce8317e82c0a4a5da13e592dff9d48f776281b6310413a96883727a","source":{"kind":"arxiv","id":"1612.07264","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.07264","created_at":"2026-05-18T00:54:14Z"},{"alias_kind":"arxiv_version","alias_value":"1612.07264v1","created_at":"2026-05-18T00:54:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.07264","created_at":"2026-05-18T00:54:14Z"},{"alias_kind":"pith_short_12","alias_value":"JBRAY6745AYX","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JBRAY6745AYX5AWA","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JBRAY674","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:JBRAY6745AYX5AWAUSS5UE7FSL","target":"record","payload":{"canonical_record":{"source":{"id":"1612.07264","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-21T18:30:49Z","cross_cats_sorted":[],"title_canon_sha256":"16074a729984b7413846bacff5ce3f19a7b7f292444470f240a57ea7f0290a76","abstract_canon_sha256":"75bbb7c2d37d1c80675076c8aec9d507d23ae7794e559a0360d5f21d2673405e"},"schema_version":"1.0"},"canonical_sha256":"48620c7bfce8317e82c0a4a5da13e592dff9d48f776281b6310413a96883727a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:54:14.353774Z","signature_b64":"QDsUWCep/qPDpA/r0N6EJ3aj6OL4wHCj9JfvjCSRlGhaOWcxUliVWSpRIiIFQTl+T//dLSZ58MjRliQFFNZHBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48620c7bfce8317e82c0a4a5da13e592dff9d48f776281b6310413a96883727a","last_reissued_at":"2026-05-18T00:54:14.353409Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:54:14.353409Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.07264","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":"2026-05-18T00:54:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KJCnu5AhJ7sjZBZENxuJsUC3UDH9wf4pbErD87OdFxxkhsf7oWouXSYZ3FSRZJOdQc7X2q7s5YQ4KbG+GKs+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T20:26:48.884378Z"},"content_sha256":"18cc0a64a57e09db00e807a040617d9958db04a7a86ad6467f8133835f8b6b4d","schema_version":"1.0","event_id":"sha256:18cc0a64a57e09db00e807a040617d9958db04a7a86ad6467f8133835f8b6b4d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:JBRAY6745AYX5AWAUSS5UE7FSL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revisiting Primordial Black Holes Constraints from Ionization History","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Benjamin Horowitz","submitted_at":"2016-12-21T18:30:49Z","abstract_excerpt":"Much attention has been drawn to the recent discoveries by the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) of merging intermediate mass black holes. Of particular interest is the possibility that the merger events detected could be evidence of dark matter in the form of primordial black holes (PBHs). It has been argued that the presence of many black holes would effect the thermal and ionization history of the universe via their accretion of matter which would have strong signatures in the Cosmic Microwave Background's (CMB) power spectra evident in the damping of aniso"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.07264","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":""},"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":"2026-05-18T00:54:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ND7MPZJnziY1OqS1w8RteRadGYOGBD0dW+oWa2MJbVh4vw7PBK8y6f399ipxiNYlyRa19aIpzRzGmi4LPzB4Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T20:26:48.884719Z"},"content_sha256":"dd075c62eca624095ba1079a1d78bfc42651a443158fbcfb7b441322d2356f68","schema_version":"1.0","event_id":"sha256:dd075c62eca624095ba1079a1d78bfc42651a443158fbcfb7b441322d2356f68"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JBRAY6745AYX5AWAUSS5UE7FSL/bundle.json","state_url":"https://pith.science/pith/JBRAY6745AYX5AWAUSS5UE7FSL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JBRAY6745AYX5AWAUSS5UE7FSL/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":"2026-06-27T20:26:48Z","links":{"resolver":"https://pith.science/pith/JBRAY6745AYX5AWAUSS5UE7FSL","bundle":"https://pith.science/pith/JBRAY6745AYX5AWAUSS5UE7FSL/bundle.json","state":"https://pith.science/pith/JBRAY6745AYX5AWAUSS5UE7FSL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JBRAY6745AYX5AWAUSS5UE7FSL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:JBRAY6745AYX5AWAUSS5UE7FSL","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":"75bbb7c2d37d1c80675076c8aec9d507d23ae7794e559a0360d5f21d2673405e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-21T18:30:49Z","title_canon_sha256":"16074a729984b7413846bacff5ce3f19a7b7f292444470f240a57ea7f0290a76"},"schema_version":"1.0","source":{"id":"1612.07264","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.07264","created_at":"2026-05-18T00:54:14Z"},{"alias_kind":"arxiv_version","alias_value":"1612.07264v1","created_at":"2026-05-18T00:54:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.07264","created_at":"2026-05-18T00:54:14Z"},{"alias_kind":"pith_short_12","alias_value":"JBRAY6745AYX","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JBRAY6745AYX5AWA","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JBRAY674","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:dd075c62eca624095ba1079a1d78bfc42651a443158fbcfb7b441322d2356f68","target":"graph","created_at":"2026-05-18T00:54:14Z","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"},"paper":{"abstract_excerpt":"Much attention has been drawn to the recent discoveries by the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) of merging intermediate mass black holes. Of particular interest is the possibility that the merger events detected could be evidence of dark matter in the form of primordial black holes (PBHs). It has been argued that the presence of many black holes would effect the thermal and ionization history of the universe via their accretion of matter which would have strong signatures in the Cosmic Microwave Background's (CMB) power spectra evident in the damping of aniso","authors_text":"Benjamin Horowitz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-21T18:30:49Z","title":"Revisiting Primordial Black Holes Constraints from Ionization History"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.07264","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":"sha256:18cc0a64a57e09db00e807a040617d9958db04a7a86ad6467f8133835f8b6b4d","target":"record","created_at":"2026-05-18T00:54:14Z","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":"75bbb7c2d37d1c80675076c8aec9d507d23ae7794e559a0360d5f21d2673405e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-21T18:30:49Z","title_canon_sha256":"16074a729984b7413846bacff5ce3f19a7b7f292444470f240a57ea7f0290a76"},"schema_version":"1.0","source":{"id":"1612.07264","kind":"arxiv","version":1}},"canonical_sha256":"48620c7bfce8317e82c0a4a5da13e592dff9d48f776281b6310413a96883727a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48620c7bfce8317e82c0a4a5da13e592dff9d48f776281b6310413a96883727a","first_computed_at":"2026-05-18T00:54:14.353409Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:54:14.353409Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QDsUWCep/qPDpA/r0N6EJ3aj6OL4wHCj9JfvjCSRlGhaOWcxUliVWSpRIiIFQTl+T//dLSZ58MjRliQFFNZHBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:54:14.353774Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.07264","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:18cc0a64a57e09db00e807a040617d9958db04a7a86ad6467f8133835f8b6b4d","sha256:dd075c62eca624095ba1079a1d78bfc42651a443158fbcfb7b441322d2356f68"],"state_sha256":"ee899f66d2827fefff6b375a870fd9c8fd876d4211f9474574a6eba963e9bde8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RWKRqdqMy1dt4rQNKIvBNdEedsPym1nbTWoPL35IexglmLffv9mXzyq9bRb5qvmFsM/4hbeUDcBcfYW7UpQ8Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T20:26:48.886588Z","bundle_sha256":"983f1587496cece034c13866e0b0b6e5d3dc1820b1a1e2041753a7403bda1b3a"}}