Bonnie Chakraborty is an Indian playback singer. He was the lead vocalist of Kolkata based band Krosswindz until 1998. He has sung many songs in several languages including Hindi, Tamil and Beng
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 0xcb4c611b94de21dfc55cbc892688e8cad4c7c19b4eb7a2ffe7f996f5ff50b5f0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fd05761-7a68-44ca-bf95-f2e38dbf757b.json and https://artists.proofprofile.net/proofs/artist/4fd05761-7a68-44ca-bf95-f2e38dbf757b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Krishno Aila Radhar Kunje (From "Ghore Pherar Gaan") - Single
Chiroshakha Hey Title Track (From "Chiroshakha Hey") - Single
Raktabeej 2 Theme 3: Click Clack Boom (From "Raktabeej 2")
Raktabeej 2 Theme 1 (From "Raktabeej 2")
Raktabeej 2 Theme 2 (From "Raktabeej 2")
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 0xfb8cded0eb6cfcc7ae3006b62fdbda31100f9c8e69271eec0cc18cb4a8b7c9a2. 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/INS181306331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b86fdd51ef747a2daa4544a2f59d34991a3badf058101f7821083b926235275. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/INS931001907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda3265c9166505e4d3fb86af4512460754bc5b29b642e013c4a84f0c6199aec. 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/INS181007057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31a369295b45c65504c51f3bb11b680f1fbb8235b31df5537e743955084161b. 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/INS180810480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ed986c8c0a16f74123ad0bceb224d6022b676023d1924284b579b289f2ab73. 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/INY091400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3323d0986edf2a17c3bdad8f0e0cda5d6005711df5acab3791773cac7055866. 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/INS180900094.
Bapi Bari Jaa (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153ad15cfb7bfa1d011a7501353a77cdcb232a8c555a0fecdf668b793b224a31. 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/INS2X1200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e4eb6c51e038acbbdb15fb9a4a97461ad8ab47edc32b9c32a6e1ea7a8b636b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/INS931001904.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch