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 0x954fafd582a0e34e84c79062ef427e39c3d42c9369d20883d19b8462e9929bcc. Chain 2 (Bitcoin): anchored in block 954008 (2026-06-16T21:31:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3315961f-ea73-4c7a-8ed1-1a89cf2c4f45.json and https://artists.proofprofile.net/proofs/artist/3315961f-ea73-4c7a-8ed1-1a89cf2c4f45.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).