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 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 0x0d9fd8c10fa0127f2169805c6e7c2c721f08d2363368a2f2a57fae39d8bf78d9. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45fda2b8-cf10-4c33-973b-ec2ae3efc1db.json and https://artists.proofprofile.net/proofs/artist/45fda2b8-cf10-4c33-973b-ec2ae3efc1db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).