, or JOLF, is a Japanese radio station based in Yurakucho, Chiyoda ward, Tokyo, headquartered near the Tokyo Imperial Palace. It is also the main company of the Nippon Broadcasting Group. Nippon Broa
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 0x5f00d5f124efcfd5e05765fda075a95cc920fb0b259471a436b122eff50a1b1f. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b89f6c56-fe7c-408a-9b1a-0cb125704457.json and https://artists.proofprofile.net/proofs/artist/b89f6c56-fe7c-408a-9b1a-0cb125704457.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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