Choko may refer to: Language Chokó languages, an alternative name for the Choco languages Chöko, a Tibeto-Burman language People Hristo Nikolov-Choko, (born 1939) Bulgarian football player Isabelle
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 0x78fbbdfc2d2b802aad9a18c33a861b34499345a139d1072bcabf924852555da9. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f743e2dd-7a78-4f6b-b420-23f0f8fc11b6.json and https://artists.proofprofile.net/proofs/artist/f743e2dd-7a78-4f6b-b420-23f0f8fc11b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).