Kuntur is an extinct monotypic genus of cathartid bird that lived in South America during the Tortonian stage of the Miocene epoch. Kuntur, the generic name, derives from the Quechua word for condor.
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 0x7ec20e6020a46c75e550f4b41734532cbcaade1d86b9ef1427713ef272684916. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0edaac49-02dd-4b81-b653-73cc8398520a.json and https://artists.proofprofile.net/proofs/artist/0edaac49-02dd-4b81-b653-73cc8398520a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).