Basu (, ), also Bose (anglicized), Boshu, Bosu, or Bosh, is a Bengali surname of primarily Bengali Kayastha community originating from the Bengal region of the Indian subcontinent. The name stems from
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 0xad41c82e8422a31534c704c7c29d5e499d1e927c3900d7066fb022d255016905. 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/538506c9-1eae-48a6-8162-7ba4d3565fe8.json and https://artists.proofprofile.net/proofs/artist/538506c9-1eae-48a6-8162-7ba4d3565fe8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).