Purbayan Chatterjee (born 12 September 1976) is an Indian sitar maestro who lives in Mumbai, India. He is noted for amalgamating traditional Indian classical music with contemporary world music genres
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 0x474422ef6766b37f539da261c10111da155637fae614180fc86f16c200b2a216. 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/3512c81a-dccc-4d2e-b98d-5524672021c3.json and https://artists.proofprofile.net/proofs/artist/3512c81a-dccc-4d2e-b98d-5524672021c3.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 0xc00edb8cf8681b414a675e8001686ca31f3a71897f77ccb0dacb90ecfaaa26b2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INS9B1400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64a75cb0af60e4b8a322135d9d2f2c0296fd59d6a92915bd396a97b063b35f9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/INS9B1700093.
Ka Karun Sajni - The Classic Thumri of Longing - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323c426e522fe8b8dd071944acfabf2df6ba93cb526b6bdcde5a403c85aceaa4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INS9B1600004.
Raga Patdeep - Raga Patdeep - Rupak Taal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c9db6cb1a67ec22a85997a8de9859562c5e321415a3b3629a2a6df219ad81e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX872000334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c9db6cb1a67ec22a85997a8de9859562c5e321415a3b3629a2a6df219ad81e. 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/FRX872000334.
Raga Charukeshi: Thumri in Mishra Bhairavi (Live)
Shanmukhapriya (The Mystic) [feat. Shankar Mahadevan, Antonio Sanchez, U. Rajesh, V. Selvaganesh & Michael League]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667c871396277fcc250c6d3d2415bd0a0a8bbad33d385a3dc29d41e820884cb7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ING642101764.
Sukoon (Catharsis) [feat. Thana Alexa, Zakir Hussain, Gayatri Asokan, Michael League & Antonio Sanchez]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667c871396277fcc250c6d3d2415bd0a0a8bbad33d385a3dc29d41e820884cb7. 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/ING642101764.
Khula Asmaan (Firmament) [feat. Jordan Rudess, Javed Ali, Darshan Doshi, Taufiq Qureshi & Paras Nath]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3177326f068bbe36a8dafd9ea674f51b6e0b81f0ba21475f8a7a0f21833c3a0. 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/ING642101806.
Intezaar (The Wait) [feat. Rashid Khan, Anat Cohen, Gary Husband, Michael League & Pratibha Singh Baghel]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d4ec83f540a4dadb711f52b7fcdf1726a6ba214f5ba397bc9fa09593df56df. 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/ING642101807.
Lalitha (The Joyful Mother) [feat. Béla Fleck, Zakir Hussain, Shankar Mahadevan, Mame Khan & Michael League]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2625a9b94106eb93ebe06f05ae93f288e37bcf7a774ffb18e778cf277524e9ca. 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/ING642101808.
Unbounded (Abaad) [feat. Gary Husband, Deepak Pandit & Gayatri Asokan]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72784e82ef175d376e24df4835ee598aabae1896cf93c7bda5035fe1b182f439. 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/ING642101809.
Nayi Shuruaat (New Beginnings) [feat. Wali Fateh Ali Khan, Gayatri Asokan, Gary Husband, Deepak Pandit & Michael League]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587e6ed0ce8030cce6491a7a4ed7704006db20cdad28de971008436847cce7ec. 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/ING642101810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0fd4c37e711bbd2a5a39e0a375522979a4d170c55ef5faa474d63b066ba34b. 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/FRX762176738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e72e8970ec1fb20a48586bd36082701ece1930f109a1b0a126de7fd78908a5. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:26Z), 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/FRX282249393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122937f961a8f3c835cb44c6ea7a5a5197d375c834b612517d99fd6eb8d93634. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FRX282262028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000e6dd8ecd0d91f87458fdd3fa805b07606fe7d0e6ead5b3cf547a544fd38ed. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX282248912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63302e66d9f8a076e86af418a3148f317b94713215bca66f26eb5aa800e1ac0f. 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/DGA052380594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d888e2e778e8304046884b91aab49d29d089865d20486a32a1b4d4746f5c39. 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/DGA082494998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b494f13272a6859669f7d8f00269fcf851cfab1091016e613901f880b7f8d3. 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/DGA092444488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d888e2e778e8304046884b91aab49d29d089865d20486a32a1b4d4746f5c39. 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/DGA082494998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29f172596c930a930ab96ea552907049bc331a12522522e9fb69d68f0544ad5. 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/DGA092444490.
Kalyani (From "Classicool Live at Kolkata")
Children In The Rain (From Classicool Live At Kolkata)
Children in the rain (From "Classicool Live at Kolkata")
Raag Mishr Kafi, Rupak Taal (Live at Sawai Gandharva Bhimsen Mahotsav 2024)
Raag Mishr Kafi, Rupak Taal (Live At Sawai Gandharva Bhimsen Mahotsav 2024)
Raag Shyam Kalyan Alap, Jod, Vilambit, Drut Teentaal (Live At Sawai Gandharva Bhimsen Mahotsav 2024)
Raag Mishr Pahadi Dhun (Live at Sawai Gandharva Bhimsen Mahotsav 2024)
Raag Mishr Pahadi Dhun (Live At Sawai Gandharva Bhimsen Mahotsav 2024)
Raag Shyam Kalyan Alap, Jod, Vilambit, Drut Teentaal (Live at Sawai Gandharva Bhimsen Mahotsav 2024)
Water Bird (Classicool Live At Utsaah India 2025)
Water Bird (Classicool Live at Utsaah, India, 2025)
Lullaby (Classicool Live at Utsaah India 2025)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7c730a437292aeaf3fa8d2ba4763ac4f23cff12ab69abf90de713c76a8a69f. 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/FRX872403009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0373c7fca719f5065b3b43d781587d3242c63d7dff198d902ce30557cb6f0b44. 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/INE182220070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37768b5e947803802708f3a19af0de0401e96bb1766e5cae8ce94b0101c42cf7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX872015081.