Koushik Ghosh, known professionally simply as Koushik, is a Bengali-Canadian electronic musician from Dundas, Ontario.Brown, Marisa "Koushik Biography", Allmusic, retrieved 2011-06-11 Koushik is signe
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 0xc47233b4101dc2a311bee6abfa7a2b9033802937126d8477e42acff99a439b04. 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/0cb94f95-8978-4116-9342-acdcfed70334.json and https://artists.proofprofile.net/proofs/artist/0cb94f95-8978-4116-9342-acdcfed70334.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 0x4566f4e701ca8f4cf0de050b1c3f9a8c9644250de7fabc3326e1c57f1cda7622. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US2S70598011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481ee2cb0eaff317f1e7ad7fef9f913e7b85e2f2680da5ccf8d960dd6517e73f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/US2S70874014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610b5a3247ff837af2d785819b4ab03ba520deab82a09847488cfdcb712d6d98. 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/US2S70650004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c26c537a92a29bcc4b2d4e87cae3fef90215ad6e433959520ed4248d50124f. 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/US2S70786014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aacb1055090fd62a261af12b5d29d94e954c9e7f1f127fbbaeb52e17cb8e815. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US2S70786017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22df40f2fb5efcfe090e6346611ee8e0e61bd6b13670ad43143d7fff4121317c. 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/US2S70730001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92c79feaf470dcbcfbd02671b4704d464371274825825bb1bdc5c1f4986a75c. 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/US2S70730017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51cae72a9cb051fa0712f18659924514edd9678e48504124b8ee063a0df5315. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US2S70755005.
Christophe Lemaire And Now-Again Present: Where Are You From?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b29940e37514e2163324b0781e54e59920433bb86d3b93f6d14ae714d88e8f2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US2S71173006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9faa60b638e352f095b40c345512dc7c1ac41241c9bdca13483b9dc2c254abe. 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/GB5EM1001035.