Crowfoot (or Isapo-Muxika ; syllabics: c. 1830 – 25 April 1890) was a chief of the Siksika. His father, (Packs a Knife), and mother, (Attacked Towards Home), were Kainai. He was five years old whe
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193f21b872d02834f67a5fd9882f2eb40f977adb6bc4f1ca6ae89e279dcdc728. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/969f49af-a1ac-4c88-8a38-c03850595a43.json and https://artists.proofprofile.net/proofs/artist/969f49af-a1ac-4c88-8a38-c03850595a43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).