Radha Viswanathan (11 December 1934 – 2 January 2018) was an Indian carnatic vocalist and classical dancer. She was the daughter of freedom fighter and journalist Kalki Sadasivam and stepdaughter of h
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 0xfe6b126ab91530ddbbc5256b27d778b408c7b8489ffb0339620a7e547eae20b4. 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/e7bbd98e-cc1b-43bd-9e16-de509f84b5cd.json and https://artists.proofprofile.net/proofs/artist/e7bbd98e-cc1b-43bd-9e16-de509f84b5cd.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 0x618c67c8f5c522f52e9669d36f42290b0f3fa74adf7beb596b5fb1f3614fc271. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INH100014560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8387b5860bcda084ac845157bdec5142e379487419fc398862b2fddb5d6a515f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INH100014570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a2554e4fa28121a5fa5372349216f6d8ebd5ea0510c397ef79f084a9488163. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INH100015920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8ab06dd428b47ee4cfc82abf55376048af13dbe8f2259f719a0f819eff4beb. 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/INH100477540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459bde08a1ce63913e9f7edcf8894f29a78bc6049c2878c54170984e8230a979. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INH100477550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb82232cf8b881ef83be4f9372c15bfc834cab3bf33e7f9081d038e0e0db8519. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INH100477560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47dd54428070582eb6ab8d969dfbc4bd309516005744b4b017f387e72ef5026. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INH100902432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5b547e1426dd7cada9524e40a60564717178751282caf694d561b281e8ceba. 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/INH100016370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed290bc9df2fb21f60fe074003886f450461bc41153e2dd55fd0f8b5ef15b10e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INH100506313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2b5f2dd0b33ec7af780e773e38661285468dc85defc582ab0e27c910c79719. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INH100506315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43575cedbed9849dbd39bfc641f42a874bc4a6a9be9be471d15ef41a445968cf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INH100506317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703a236d7bcca701741d4a846030e97f24ff07a96c3fb1aa391b3702a92a36cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INH100506318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b644cb8661e3f690ce26c995688fbac0e31646838deeaf9f87a00735e04f03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INH100506322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb0ccfa7c02852a4d9211686d717b74c56b1cf83efbf5de79be8d8586ef69a0. 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/INH100906361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b30b9b80aa84b60bf435317a5611061c06793c8d108f9644179b71a01c6455. 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/INH100626566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e8b5ba1288f0fca7c76302748d772b709d9f3b2b918b68c5e75e7b539c7baf. 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/INH100626570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07018300e4a4fd4c027354abc67114b1ed04001b160d792b3d45fdabbe1dde5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INH100626571.
M S Subbulakshmi Harey Rama Harey Krishna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e89bb1d4f41f3898e60031d075647562a80a8f5c9e3f6c4c422583be5b1559. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INH100700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cd588bd4ce9ae3ea1fabb8c80c7e68ae6a986c0f045bc66247a1bcf911cd42. 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/INH100700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102b611a4ee9456bbe33c90321fcb4e9508906e35f44f3a6ef343721e0a806b8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/INH100015730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251e423416c3520f2cf543f140183e7756d527ae64c2e0ccb38ece0ee7bbcc68. 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/INH100502176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386266ddbc1f1d3d351186302ea5dcc82ba52333e7f1f1a47730a02f0bdd8e36. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/INH100624166.
Ksheerabdhikanyakaku (Raga Kuranji) - M S Subbulakshmi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92683808142dad39939f6899f44a872955e6b7462c3a3b01cad3d357cdd00ee9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/INH100016010.
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
Nanati Baduku (Raga Revati) - Mssubbulakshmi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b770d73926bca279224988aab5d7af03790c40fdd595e470b3e79b20893d9. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/INH100015940.
Dolayam (Raga Khamas) - M S Subbulakshmi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3990b08446263edf90aead0a360db7577dcc1e7b5bffc9317dfbabef25a4689. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/INH100016220.
Deva Devam Bhaje (Raga Hindolam) - Ms Subbulakshmi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e46f10b8eb3af6270f1d43fde69dce17fee3e3ef756abe713d99bcfc916b12. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/INH100016240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070257c3b2a6068b639612b70e9bebae32e86f155a9719b2e621502951106852. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/INH100902373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3f0dfa4357bf8231099c971720b66af133b73dfc6ab95c54d98cb7912cb0d1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INH100117000.