Tetsu (written: 哲, 徹, 鉄 or テツ in katakana) is a masculine Japanese given name. Notable people with the name include: , Japanese photographer , Japanese voice actor , Japanese musician , Japanese poli
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 0x0cfd7f1388d68508d36299cc0f674c38bbfdcba7556e67b64dc6c92eec5f6be4. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c48b3819-8f91-45af-a102-c4cb3bb36b36.json and https://artists.proofprofile.net/proofs/artist/c48b3819-8f91-45af-a102-c4cb3bb36b36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).