Koston is a surname. Notable people with the surname include: Dina Koston (1929?–2009), American pianist, music educator, and composer Eric Koston (born 1975), American professional skateboarder and
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 0x6b5b2b81ef0ac19fff96d9d39c4e8a89d0ccad49243df171bd1d8fcac69e783b. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00dc1afc-93a0-4e38-ab91-39e565127f09.json and https://artists.proofprofile.net/proofs/artist/00dc1afc-93a0-4e38-ab91-39e565127f09.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.