Nobodyknows (stylized as nobodyknows+) is a Japanese hip-hop band founded in 1999. History Nobodyknows debuted in 2003 on the Sony Music Associated Records label with the mini-album Nobody knows 3.
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 0x96fe2dd0bb207d066d609bc07408f22c6da8f7ab0c910fe79db70640b88e28cf. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83625dea-f2d3-4f57-954d-eeda3e98a326.json and https://artists.proofprofile.net/proofs/artist/83625dea-f2d3-4f57-954d-eeda3e98a326.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).