The Nair (, ) also known as Nayar, are a group of Indian Hindu castes, described by anthropologist Kathleen Gough as "not a unitary group but a named category of castes". The Nair include several cast
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 0x60a0fc0f4149a473b46a339070cadbbcff5e72a555f242e2432bd0dae311a242. 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/03435028-4cd1-4b31-a8cc-e18fb195a88b.json and https://artists.proofprofile.net/proofs/artist/03435028-4cd1-4b31-a8cc-e18fb195a88b.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 0x9976d8ed6daf01a6baf596ffc2e19ef9e572dac88f2b6eb733e5b44cdae55052. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CH7812214365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e13ba339809bf6a6eb2a8b5806fcad12cdd36e50e435dd5045260abb243b3f1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CH7812404108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a14b21916e7c8397d2d5633b365ca401cbb3ba3a203a322863f89d9384da48. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:57Z), 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/GBRKQ2454334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d530cd0c1341fef5a2f424df4f0e084c4077f78310fdb6cc2c25b1bc815e76. 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/GBWUL2486860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76663d0c4a13b5532bf8da094640c79d907d46056d9c2e652b6337ea49d4be0b. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZTV32482348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a7be385a58ce1929b2853e32c32babd9cc44da8d3561c9dd40ae1a9fa7057a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDE2424467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16730f19e624a746f9c150d6c20d3479e265e0d06d519a2c88628bd937ad62cd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZWV32455257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566308b94ef4056ccbda4d49cf9372870cab03d067d7c97f510e4dd95b2c1d4e. 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/GBRKQ2560581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f1b0bc6966d8779ea15191622f46d23ded3e34921474afa2f7df8cbe13656c. 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/QZTV32571031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe3c0a105f282a8dd352f69b47d17e11f4a068099f115f8a30a6f90e917b901. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ8A2512548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd74a8471a16f2ad97a84c8c2dd2329c47bc1f9f4ffb088cec6dea66818962. 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/QZZEB2361516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62df58659a7fe83ceb75c81297fde568f7769d3b1fabd202fe55cd0b32ce914f. 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/QZZEB2361064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42f5a3644b38de32b95ff6dfd15d689bd890012bcd650f5c09e1300fc32ee0f. 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/QZZEB2378107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25c06e6eede06b835ef2e4174e7daeef7e830c29ba6fa0be2ecc419ba368025. 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/QZWDD2447064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33174cab9d132dc959d827538d1b6b03a8f614f694289ab80e72c09cce22c9b. 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/QZZ8A2423805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c186a71bc4f8fad65e1f20f71291b622fadc33423c1854792e9c7fcc16de25. 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/QZWDE2428869.