Vasantrao Deshpande (2 May 1920 – 30 July 1983) was a Hindustani classical vocalist renowned for his contribution to Sangeet Natak. Deshpande notably starred in Purushottam Darvhekar's popular play
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 0x3c1342b9935742d69e651935b9cf5810aadecfb2396deddafc046530615221b2. 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/0d77e3e4-040a-4985-8311-b1145bf137bd.json and https://artists.proofprofile.net/proofs/artist/0d77e3e4-040a-4985-8311-b1145bf137bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Marathi Sangeet Natakachi Vatchal - Part 1
Marathi Sangeet Natakachi Vatchal - Part 2
Marathi Sangeet Natakachi Vatchal - Part 3
Vasantrao Deshpande - Natyasangeet - Shat Janma Shodhatana
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 0x07d52ff23b5633f31cfc6f6e5d9e00a1a5cedd41192b1b74272af5bea033b578. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1052449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a865336a3b32084efddb27416021faeace010dc26c3349fe22a66110ab57cc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGH1052450.
Baglyanchi Maalphule (Jhankar Beats) - Single
Datun Kanth Yeto (Jhankar Beats) - Single
Tejonidhi Loh Gol (Jhankar Beats) - Single
Surat Piya Ki Na Chhin Bisaraye (Jhankar Beats) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9889a4159a8f962d3af953960ea69d98d4f9769848eb9c6ca0b1ca1645b451af. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/INH100339170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408ea19e57b0e93374f3765f9db656af3ccbe3e967beef35945e2ed1bf24d82c. 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/INH100339130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ba16b7d76ed86d6f1183eaad48182352abdcea55b77bdaca4e2867c17b0ea3. 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/INH101100570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e8ce7ce6cf9b2fbcd8b891afb389f8bbc4c8723951a397587a6b57a05b7be7. 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/INH100335370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e33e1bae52e642928b7ff334b74706a47b7604759515aa5f303a637a912de5. 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/INH100429420.
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