Tanu may refer to: People Malietoa Tanumafili I (1879–1939), Samoan prince Tanu Nona (1902–1980), Australian pearler and politician Tanu Roy (born 1980), Indian actress and model Places Tanganyi
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 0xa8b5b943a3ac905e6d02a856485d2d132caad50021935aa850f673c2fa35b6a9. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42eea605-ce83-45ce-bbb5-51074647d9b5.json and https://artists.proofprofile.net/proofs/artist/42eea605-ce83-45ce-bbb5-51074647d9b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chale Chhi Jmin Per Asman Dalke Chho (Maithili Song)