Prasenjit Ghosal (born 2 December 1979), known professionally as Dabbu, () is a music composer based in Mumbai. He workes as a music composer in Mumbai and Kolkata. He has closely worked with film pro
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 0x4eedb92d96f270c4196b5b461b85936538bce2d0c6116d81a405c45698b78599. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcbc57bb-0383-44e3-a0d2-71c835559025.json and https://artists.proofprofile.net/proofs/artist/bcbc57bb-0383-44e3-a0d2-71c835559025.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Network (Original Motion Picture Soundtrack)
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 0x32ffb8bbcc2101c138f378680ad186f8f7496d10b31069b171c0cd75ad68e48c. 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/INS182302168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ad1790fd5c18a845c873848ebcd5a29556bdac39fe3bfe644fc182b40c222d. 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/INS182300527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae906de8b20b53d3c190036cae76279ec99bebac09afc17f714b4229c1580f98. 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/INS182203816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1d713b3f1a8a346fc14dd1321e7788d05df2eee71745bba1b71c830148f357. 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/INS2X2200131.
Happy Hoe Ja Re (From "Bhoy Peona") - Single
Shilalipi Bhalobasha (From "Bhoy Peona") - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead66e8b19a21efc803a7c4b3477f3e130f15b3e6256ec701973db7bd3b4aa0. 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/INS2X2200026.
Harano Prapti (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74744691b26232740e7a847070a1ec15e4f1275155c09f2a061a90866ff64c3b. 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/INA792000134.
Mehboober Biriyani (From "Harano Prapti")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36064ad245f8d976776195b617c65ab3bdd85cf7661fd7d78ce51fd84b10b961. 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/INS2X1900302.
Crime - The Dark Side (Original Motion Picture Sou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f761ae42875a88e16ee01032205b72d0e4475faf7d0d9b248e6d170133386af. 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/INS2X1900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4756a43ccded290dc4810b44172aefa2d1e1b371e7172862f6161661790b2bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS2X1900301.
Amar Aponjon (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf92c6ccc9a7758585d1f2d8d224fea5e72fcebe46a4c71c0767b9d7cfa55cb. 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/INS231712253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd63b81fefd6d147d404371ae121663bbbe1b9610471d166ddf5974ae54638d. 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/INS2X1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36777c314950bf8e59c4487f9e38f179daf960a9ecfc6584ed423d66c006d6e. 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/INS231712255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57486ef5e2ab51458cff5cac90134618626adcc444737314532875499b89ad0c. 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/INS2X1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87535f3319bda4f7f7e339ae74b2915b99af80334732fcc28aafe2e4aaddf660. 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/INS181502055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4647c02a79c4d9ab8b601b63756a8d4b6cfca2a13808e6c7d225ded55231df75. 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/INS181502056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2a2be275ae003581e9c52f148b70e2baa7f220d02d24121dc00445a46f1df5. 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/INS181502057.
Jamai 420 (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbeb7bd6cf4db804aa27d2f8a9eacad8ab0fb9913717bc1b65d08b96f52432d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INS2X1500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e36b288017c6a899d3906009cf742bb7874b6dc632394fe8c9e2a0a36b580ce. 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/INS2X1500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261e5d789ed796997e041fea4bbc6acd912190b6f3b0d3b69b2c16a90110ba66. 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/INS2X1500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85961a004e44baa954016eb639ea4cb77103cabd4fb9871e7d60181d44968a60. 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/INA792200486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b556fdb76098be609fea02f04cd38a18b54c3c3756359c58f1073288bba9434. 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/INA792200485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97394e267be5626d416dc0aed28f49e35acd70becd191bd69cefaa1d8edc435d. 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/INS182302785.