Hideo (ひでお) is a masculine Japanese given name. Notable people with the name include: Hideo Date (1907–2005), Japanese-born American painter Hideo Den (田 英夫, 1923–2009), Japanese politician and new
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d57325ff1271499789620256de81da655633367fdc1f28ac49d7e80cfb612c. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1dace92-c710-4f1f-b0a7-71816fbdefc1.json and https://artists.proofprofile.net/proofs/artist/c1dace92-c710-4f1f-b0a7-71816fbdefc1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Tale of a Certain Concrete Jungle (インスツルメンタル)