Sourav Sarkar, popularly known as Joy Sarkar, is a Kolkata based Indian Bengali film music composer. Sarkar mainly works in Bengali cinema and albums. He composed soundtracks for Jodi Ekdin (2010), Ac
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 0x087830acad09f5f6bd6c48bbfd795052b671882ab91e4b35ce2acb2ee0a60587. 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/240ce301-d0b3-4d78-beaf-450aa03b6d97.json and https://artists.proofprofile.net/proofs/artist/240ce301-d0b3-4d78-beaf-450aa03b6d97.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Uraan (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 0x7988dcb764ebc902cddb88946161d89fca17633471baea072de0281447c2d9b1. 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/INA791501184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d63eea63d890d4bf197e45f81836a5d16d88bab55fff5d441bbc65b06033fcc. 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/INA791501186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423e13cb1880260e16825d2c8262224706f01cecfeef87f369cfe0261db0085f. 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/INA791501188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1838836da85dbd5b0d11ae097a88e81c8dcdb84698860c84eae19fc750d2fd43. 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/INA791501190.
Sesher Golpo (Original Motion Picture Soundtrack)
Abby Sen (Original Motion Picture Soundtrack)
Bicycle Kick (Original Motion Picture Soundtrack)
Accident (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9b7088b8a4f8879531185f9d132da17f0e8dd74f1464e4d0f16f0362512d0b. 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/INA691411006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fb33ba1f3c6c10b17f9e39d7af82eb7cefe3086b753789d35d9cdac6b0d89b. 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/INS930405257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63833870a1485d5942f542b4c71109454fb2205b313c41135a16a43eb190810. 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/INS930405262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd80dc2b45520e3f151c6790e774f18f86360a3663750d29238a319c1c1bce55. 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/INS930405264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965a2385125c6b3f6eb5b6d6e21415f974539680646ce900ad68a05d35e68095. 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/INS930405258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6954eb8c8c1fcf0a76e042782bc8eaf59662db999fa23e64a7c65ffd6815c30e. 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/INS930405259.
Era Porke Ke Apon Kore (From "Niharika") - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957260b127f191584584243318aaa3147bf81a199e3585f9ee7e231787318845. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/INS172306715.
Toka Dile Bhenge Jabe (Male Version) [From "Manobjomin"]
Mon Re Krishikaj Janona (Female Version) [From "Manobjomin"]
Mon Re Krishikaj Janona (From "Manobjomin") - Female Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f038b9e391d0a2b471fc129f79440feff1dcd442d1c6b08edd9e97d274737a3. 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/INS172223820.
Mon Re Krishikaj Janona (From "Manobjomin")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd2110966bfe86f4bef50a595ee8ba1b0a8a3b4db69c97d7955fc02949217d2. 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/INS172223804.
Shiraye Chhote Traffic (From "Manobjomin")
Toka Dile Bhenge Jabe (From "Manobjomin")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ca9293415a06c19bea19852dd8f6ca6153272e12e48c81db50d4c369e7b757. 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/INS172223765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eee84ffac7803c7c305af08049e194701630255bbb0cba38da6d878a1aecea. 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/INB562201015.
Boudi Canteen (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f87ddb11290900eb5e124c995b48f9e29100a54b5a5294afbf4aa22b7a4dc. 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/INB562200939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf21a1a1fe1f10053a19e4cd9e0d83102094efa6447695d73a39cb325133d9. 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/INB562200870.