Kumar Bishwajit (born 1 June 1962) is a Bangladeshi singer and composer. He received Bangladesh National Film Award for Best Male Playback Singer two times for the films Swami Streer Wada (2009) and P
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 0xc93f0ecf07b64bc4a3706ef402db4d8d27970c3d7410724dba9a685e6f89b80b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e56fb4a2-9503-4c85-be63-30e18eadb8fc.json and https://artists.proofprofile.net/proofs/artist/e56fb4a2-9503-4c85-be63-30e18eadb8fc.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 0x1b2ed7bb710b062a166240c5d5ac5867544d9dc6dd314840d7e4d64240495ccb. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:59Z), 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/QMLNB2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d749f956805b01bab3ed98a499e249a6441dc991c38390479d677237d19526. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMLNB2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebcd29c0c61331959110133042c8610c9b7e531dd031a8b85ef6a07cf933407. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMLNB2500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f16697e531af7f97859b2b5ff85b21eac06a71ca3b4cca9683836fea74398f0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:03Z), 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/QMLNB2500152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccdaae6dfb8007344b3c56ee34219cc22d707f6569045cb78810a1144e48c1a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QMLNB2500154.
Shami Strir Wada (Original Motion Picture Soundtrack)
Mon Churi Chara Kaj Nei (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644fb46bb812a5223297441d39226c38820ba245078942ee0a8e123ce1abf14e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R1689867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4edf167ec93fd56d92871df7653939755b5458e6cd15bd944bed40df65753f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR59R1689875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65ebb85593887f5f9d127234f531fb84d4b8664bb8547c50ec9e8140c16d196. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R1689877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b47e3c17fbd928bd2b5c25c07ddde385b49dc432da2232ca04f2b6aa27b2f6f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:54Z), 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/FR2X41976732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce9b970ebf83b26519f6f11c35cbfaf89f3944463c56623daa5171c3fdbfca. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:29Z), 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/FR2X41976742.
Shutopa'r Thikana (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626933ab059d1cc61278295be1cb9e5f054bf5d8445a391213029dc855a182ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX201711431.
Evergreen Collection Of Kumar Bishwajit, Pt. 2
Evergreen Collection Of Kumar Bishwajit, Pt. 3
Evergreen Collection Of Kumar Bishwajit, Pt. 4
Evergreen Collection Of Kumar Bishwajit, Pt. 6
Evergreen Collection Of Kumar Bishwajit, Pt. 1
Evergreen Collection Of Kumar Bishwajit, Pt. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf914117b29c1bc01904090c9d681393687dd8467a9b87d93ee5d1098ee16224e. 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/FRX201729641.
Evergreen Collection Of Kumar Bishwajit, Pt. 5
Evergreen Collection of Kumar Bishwajit, Vol. 8
Evergreen Collection of Kumar Bishwajit, Vol. 9
Evergreen Collection Of Kumar Bishwajit, Vol. 10
Evergreen Collection of Kumar Bishwajit, Vol. 11
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d925e0044bc0742d653643312f20ddab9ecc03a9bcf0057547b615dd3cd0d4. 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/FRX282003368.
Tumi Jodi Dao Mon (From "Meye Opohoron")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85659aedee64ef18e8d8f4d0784bec4b6faacda2c897fd24241b265338a22ed. 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/FRX872333944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d52c9ee17e0f67bb909a4e9599782e7463c124c4db9693b14a741dd2712e54. 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/FRX872333948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339a4c232a3a5b5689e132f0e0c19bc78430fc1df6a3e1492f5da3cc82c5f38d. 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/INP832103706.