The Matis people (also called Matsë in their own native language) are an indigenous people of Brazil. Outsiders sometimes call them the Jaguar People, but they do not like the name. They currently liv
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 0x931837f3ef44fbe6650cff1c9708aa84f1d1e8a903895011b9a9b0e27c7af5d2. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fc9b5cc-b42b-4ba7-bf14-5870bb7e2cfa.json and https://artists.proofprofile.net/proofs/artist/8fc9b5cc-b42b-4ba7-bf14-5870bb7e2cfa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).