Playzone is a Japanese musical production. It used to be presented annually from 1986 to 2015 under the auspices of Johnny & Associates. The lead role was played by Shonentai until the 2008 performanc
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 0xb931284a8e687d156ad550924c4be3bf491f906365e7812c02e8e960054ef0f6. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27cb6ff5-da37-4461-9b3b-b84e4db44463.json and https://artists.proofprofile.net/proofs/artist/27cb6ff5-da37-4461-9b3b-b84e4db44463.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).