Lagnajita Chakraborty is an Indian playback singer. She contributed her voice mainly singing in Bengali films. She achieved fame with a soulful track in the movie Chotushkone called Basanto Eshe Geche
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 0x101ec750d46606a99df500787f732fdf5615b7e6aa88adcbdc152016280f6f3a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45f80858-2ed0-4c4b-ad3a-81841b41550b.json and https://artists.proofprofile.net/proofs/artist/45f80858-2ed0-4c4b-ad3a-81841b41550b.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 0xef8d9c043b0080109a3709ee63dc0812928fc96cf829eb8f42504545c67735f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INU121702327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9babd1dc3f4a68101de22e097bc03c892b04cd3a41fb8c01e80e8fe68cc97cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INU121702333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d03d0b1d13fa235bdd82dc55a30417a7114b151970a7277dc275f0d5a37272. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/INU121702332.
Dekhechi Tomake Shrabone (From "Dekhechi Tomake Shrabone")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa589378c6d2833263ea35725b994f3b99f7e93279fc0646b2b5f0dffddc09b50. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS3O2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a97775c8fcdaf4ebc32cab7ff5835b9bb027a737f153ef746264c20337e30cd. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BDB081701404.
Ekta Golpo Bolo (From "Onko Ki Kothin") - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eab63dcdda4122da16393e385b95d91bc86ff3d13cf3e35ead5dceca36d4d4e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INT442402240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cc6cee6c3bd7e98d02fd6c550dc30692978b3fc359aa208bc4610755f06495. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS3O1800243.
Bhule Jabo Ki Kore (From "Toke Chhara Banchbo Na")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6eacde50f8ca84059a8562208702996052d1466f3e4ac8c541dcdd667c2804. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS3O1800222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ee7e9b6a09241f0dcd8bf5b61c12f5b1d34ceebb0ba55a95afa481e643e681. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS3O1800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833448427bb55a351867cb5e055d2103949ab238d9d3f9957d727e785c57042. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INB562202845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768a40c44d3c21edc4a778c3255b137d6f5cca4731a61f7ae5aaa9c2a2f03bb3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INS2X2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5040cbc79549ff1558286a3b7bad82f56b14ecfb7a5a0631973eb3bfaaaacb7e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR2X42489582.
Purnima Sondhay (From "Sedin Kuyasha Chilo")
Purnima Sondhay - From "Sedin Kuyasha Chilo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e7c9b19e8cab5bf11a72881b364d1be428ec0449c779e907da22d3b5ea783b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INZ031414384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00a22e5f4b5fd26bbb5ded603b6226041789110585ac2b311933dec61396abc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUBEC2408302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c9212401db33cf112091e843160eafa0591a19a23843ac70da2b984782da11. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/INZ031414296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb4cfc74764c86c5a70f81858b3ae7ae42cd8070f7de43d47b17c4fd8feb1ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INS182301822.
Bhalobashi Bolbo Na (From "Swapna Uddan")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c76624135ca8e52a6def7d6fbe28ad02d0f9e899326c432e1d6cf1ade2c084. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/INS182303461.
Time Machine (From "Shohorer Ushnotomo Dine")
Time Machine - From "Shohorer Ushnotomo Dine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7ac2ca0a89231f1b35be68e80e4900bff5ebf9d3418c636640f61a23c39f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INZ031413184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a5c4cc6b06cee362b3898584b6e96a1a9ab8a5ce5a34122b2397f1a332d1a2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX452385693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52b4f46e72ffcab57b526be46b5d3b4f48103dff71e33031c0cb67b9d929f7a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INI111675616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ba93e9d126cb52283e92a896c9efbe6593e4af010e727f5f3a17679e8bb854. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INI111675613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe427b41544c1b3c987b63fcf7d75b67b5460414cbefcf6d857ac6ea44a12f59b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/INI111675618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b876030209daf4671ac419c5d5169b19c97967d6cdbae172d2a1b557cc4a4ce. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/INH102206374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89da525c7292d334836f812d4e42b9104699b28e2c83d40801f932dc46300de. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX282083461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9905475258283c8bbb9b392710f47a1ca790fe631a26104919aa84e24d71c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INS182202504.