Thumri () is a vocal genre or style of Indian music. The term derives from the Bhojpuri verb thumak, which describes a rhythmic, dancing walk that makes ankle-bells jingle. The form is thus connected
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 0x5cc7f30ac2da9d20e6e518b1818924a8022f0dcf8b68d707da8f754195e5372b. 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/80c7905f-1d43-4a46-b4fa-ef193823b5b8.json and https://artists.proofprofile.net/proofs/artist/80c7905f-1d43-4a46-b4fa-ef193823b5b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).