Madrick is a surname. Notable people with the surname include: Carl Madrick (born 1968), English footballer Jeff Madrick (born 1947), American journalist, economist, and writer
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf5331b4d118d21eb25ad5bd5c46abaae00ba30c1b88e2625d6c6b9282fc17. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f52b1e0a-83d3-4ee0-b076-73bd91b9d7de.json and https://artists.proofprofile.net/proofs/artist/f52b1e0a-83d3-4ee0-b076-73bd91b9d7de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).