The Tempters were part of Japan's Group Sounds pop music era in the 1960s. Featuring lead vocalist Kenichi Hagiwara, who was also known by the nickname of Shoken, they rivaled The Tigers for the top
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 0xb75845f472477239899d0d53b1665d0c17edf7f606b956ea68e6122e38530c11. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/586173fc-a344-4940-8e3d-b22357f9e45d.json and https://artists.proofprofile.net/proofs/artist/586173fc-a344-4940-8e3d-b22357f9e45d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).