Prithibi (Bengali: পৃথিবী) is a Bengali rock band officially formed in Kolkata, India in the year 2005. But its original formation goes back to 2001 at Ashutosh College. Presently the band consists of
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 0x309b265c3291a4b18134ff1b6622c3d1b0d1c159891251d91bad7b02c02a1224. 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/5d834b28-973a-43a4-9dc1-80e739152023.json and https://artists.proofprofile.net/proofs/artist/5d834b28-973a-43a4-9dc1-80e739152023.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 0xcb3f96d7071f94acac7da7544bccd94b01fc39714458851deb69b175e4777521. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/INA190700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b116f5b256eb8641857e6a50025021eba0d6ab11a9ceb2ff62a36320098ed3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/INA190700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e89255a346c548843eb50551904cd48ee0c8404d0e58920d6e5f9573e46b6ce. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/INA190700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28fde30a7f3303466307948d7d4fbf1bc9cffb6952b287f8ebc346ab6f5f1cc. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/INA190700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd4e8bfd310a49ed4a4aa9a309f18702514f6e300edfa1bd1db6dc357f13ab8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/INA191000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483efb0e8e9c9c848cf9ee854c741d5e8fac1f7bd16f0388acfbbaa92e7c9f3a. 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/INA191000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490e0e7d26b2b55297f47545988b3709bcb349f4eee485033251457d1c04b186. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/INA191000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4ec9b51d49fb75d23709b2d84ec23f0e70dfeb65e359ab50be4c52e3be7edb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/INA191600279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8960d0af0a40b8ff2057ed19af09b4d0ceb3e709af5e815982bb84ab5192db. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/INA191600280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a79354148e20e78fc1beca00ef285c55bc61c05c6a44761842f333cf51c6421. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INA191600281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e018c735bdf8f0163df5e6264c2f9e6c873eee3689bef582575a1bbecb558f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/INA191600283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f698268c467ce95ce552fe2f4ea2d2387963671fdf5bb9e9ad9170b438bae. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/INA191600285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738c029b5e842a6abc4ed724371a518cf42e54033da79919585c2aed4071a5b0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INA191600286.
Nishiddho Porowana (Reincarnation Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126000c5899f1c59ee247a75d74e25d325e748212373766174eef5a38dae427a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/INP2X2400649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf168443ee790143b7f2a73a68377bd2d0e3f5b3315076667fef101d0b066e911. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/INP2X2400651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ad374a38d6dee91f277073abd0190765bf568dacf948426b28a225acf60947. 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/INP2X2400652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeb925488204d4c300219f0a00aaa5fe37aba7764e1f1526d648df020dfc5de. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/INP2X2400654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88debe6db6d3f52a914ccb1538a16b475182a01d30fa2663a9a008f6d0b6d317. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/INKH42500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d56deab19359af84b080737f0ab902c71bd4e69abb071642a7238f0193eb85. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/INKH42500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bed5e7fd418a0fb6ef53e23306f8766981f8828b5ee77d1c3ecec5fe750571. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/INKH42500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8255c44863127f1e2f1c7002f566f3164afc16c0d72bf59af0e7d5696c7bdbeb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/INKH42500006.