Duarah is a surname belonging to Tai Ahom ethnicity but this surname is also found in Kayastha (Kalita) community. It's also written as Duara, Dowerah, Duwarah, etc but Duarah is most commonly used. N
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 0xc621216d169137671c213531f719e20f2f0eaf556306c4ce85e548a740bdbba4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86ad7be2-d523-44b9-8226-6b04a026ee11.json and https://artists.proofprofile.net/proofs/artist/86ad7be2-d523-44b9-8226-6b04a026ee11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be441dd891717df7f7526bba19cb57ded390dbdfbcdb2036b7c268b9d43795b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1890224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8f42db463b7650107e4130c26d0aec282a19a6f822c91fb825e17057b1eeb1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:26:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1972427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3159978f89c021fa6ea0c463965169c898291eccd0bac5a6191fe4614b55dee. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1997164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142ad63e80c1db68eca4cb265e133442f07ce9ed99b69d23c23553541a757cfd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X42028683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d7fad0537d50349cb1c8f6cf1a54beabf514fd54e6016e5fd1405bbf71d62d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202180927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0219da01b12ec761a4ba4239db7513b3a6b6a36de1c1c4dd94963d0521e5b537. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762109034.