Darko is a common Slavic given name, and an Akan family name. People: Darko (given name) Darko (surname) Places: Velké Dářko, a pond in the Czech Republic Movies: Donnie Darko, a 2001 film by R
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 0xed186cbe4bedb6c5c9276aa918637b4c05c8aeef88024b1efc83c7c566e499c7. 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/9932f912-ef4d-46b3-98d3-eb0c4e13d2af.json and https://artists.proofprofile.net/proofs/artist/9932f912-ef4d-46b3-98d3-eb0c4e13d2af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).