Shubhashish Mazumder Bappa (born 5 February 1972), better known as Bappa Mazumder, is a Bangladeshi singer, lyricist and music composer. He is the lead singer of the rock band Dalchhut, which he forme
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c9f6fb12c0a784c6b0910f6b0198cb880972195bec2765206004380b7bc1f1. 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/ee7e918e-48b6-4128-9cb0-32fdb78ed938.json and https://artists.proofprofile.net/proofs/artist/ee7e918e-48b6-4128-9cb0-32fdb78ed938.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2b8ddab8168304dc42ab18e4be7ee688d2d632c9ca23971b91b4b7516018e6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR59R1729270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f2ef828237e5ca915ae90e29089d6b131ef8b9979d09b12877b864a504348. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR59R1729277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0046e7e43b5987d8076e443ea49df485b5dc2218aeb7a6478634907a5e7ad6f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR59R1732946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d8076819c2fc24350e4d307a53ae0835eceb7ba757391ec4bb412424680d9d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR59R1732947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd62e4442a6ad93fb785632b91ff5e5f5308e3cbd00fdf29422746154ea3b3. 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/FR59R1732948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b90994c8084ae8ddca5e10da9eee47d2ae9f1585bd8e2353fec782711a7e5ec. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR59R1732949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c57e25caa6d631593ded5122fbb10e9ec1c55164093374995d4286209d525a8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR59R1732950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75361e8f30c1cc10374c845f2c76ea90df352f12c649f605be6ce3afab5309e7. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR59R1732951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b8fb124ba6d0ae5eb312b8cf53d5ccc6e7f21cd46c9458d92bb7253fe491c9. 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/FR59R1732952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f2a830d3d17fc7f67da0a12a2dcce1ea62c5f6a05ebac369eb75cc6c6f48b9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR59R1732953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7cf61308b3e8da9cb264f0d32b99569de9875bd9aaab96abc1a910d8065bf2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR59R1732954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db1c4d0f5cd22982f2b41b4171ac5802c46ddd59c359f6f98298f55a4eea4ea. 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/FR59R1732955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d76a92a515127b0d45e6a48524abb76f45bac8ae56f8777dfeadae0d3c959. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR59R1732956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec7c9692900514835452cbcbdd83a70c091d08ade642541b12070af94ab168e. 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/FR59R1732957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaca9ac50794d16942934256954287eee8f418cd1631c928770039e49ea55520. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX762336668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745bb955b8719156ace45b590730eb1fa44c04351821338edb254b9f03c6273f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DGA062035870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e452ce5b34ccf121987e82ab9dbeb90f610530f2a0d6cc83e184d397485516. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DGA062035876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d0a829a8ec3f2b7b4b59877aa7dee67e54f2321c0ec6d6f6d6dd1b46d0e34e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRS182152109.
Alive Experience By Bappa Mazumder (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cace9d3d351b790e232167a645544e75ae1b391d057862a0f5df1b85d360db. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0L2404202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2ffdbda5fc7936af9e1c4041676cf557f120e98cb672c7e8ca1b6f9d7555d7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DGA0P2449857.
Waves In My Mind (Extended Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bc5266750e752cf95883f47fc75a54db14187e7a16367add1a53d52a25ad35. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FRX762584501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76191a188f3a36c9a96ad504d9309f9f20ace2aada4f877c5ef81ae4e637a0. 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/INH102203379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904c09ed25f6f3925e0c6b0a70fb1b47bc096c303b537a28126f4deb44ef36a. 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/FR59R1737323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fefa0d3354d72d095e55eb28194fe53efae7aee06d6d7d2e5caaad698cea447. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR59R1737326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a81747181ea029da11940ce2c7494bd5bfcab2885c12c4748f72869f5aa6e8. 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/FR59R1737328.