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While the maximum gravitational recoil from \\emph{grazing} high-energy collisions ($\\approx28\\,562$~km/s, i.e., $\\sim0.1c$) and the maximum radiated energy $E_{\\rm rad}$ and remnant spin $\\alpha_f^{\\max}$ from such encounters ($E_{\\rm rad}/M_{\\rm ADM}\\approx32\\%$ where $M_{\\rm ADM}$ is the ADM mass, and $\\alpha_f^{\\max}\\approx0.987$) have been established previously~\\cite{Healy:2022jbh,Healy:2024lhl}, here we focus on the \\emph{head-on} high-energy collision of equal-mass spinning black hol"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2607.13018","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2026-07-14T17:57:21Z","cross_cats_sorted":["astro-ph.HE","hep-ph","hep-th"],"title_canon_sha256":"c17eead58e3f3386d835da3430fbb939da5ebcb6346a592e0be02d3025bc71ed","abstract_canon_sha256":"a38a9cedef2a5484a0f4fa80e611beae0c77168a202e28cf651a8c5fafb3768d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-15T01:22:31.614734Z","signature_b64":"zMGv50yTSYDE4ZOi/vlMYbG6VYduc0zaCTo8nDTf7i2hDcaAt3s0EOWZ8+n/t5vhhMVutaU1Rou2HdxIRDGODw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b55ea4f4420415664deb6f0cc5f8da3f59b21b9e4d86dc143e1cf1ed2c74e66","last_reissued_at":"2026-07-15T01:22:31.613925Z","signature_status":"signed_v1","first_computed_at":"2026-07-15T01:22:31.613925Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Antikick Relation in High-Energy Head-On Collisions of Spinning Black Holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-ph","hep-th"],"primary_cat":"gr-qc","authors_text":"Alessandro Ciarfella (RIT), Carlos O. 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