Kayhan Kalhor (, born on 24 November 1964) is an Iranian Kurdish kamancheh and setar player, and composer. He has received three Grammy Award for Best Traditional World Music Album nominations. Kalhor
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 0xf0e550f4bf0f1ffb5e3f5f239f4e0fe7dd1faa6af41eabc631d01a1a144db070. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de634218-c481-4047-9ec1-4547a4a192af.json and https://artists.proofprofile.net/proofs/artist/de634218-c481-4047-9ec1-4547a4a192af.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 0x81be444bef901ccf931ea910ab1cd7c0cea861363f161c888d1c879f5912d916. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMFME2118650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c4ac98c421e0da504677af97b5a0756be28f3c17127dcb3201ef909cb099a0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QMFME2118651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e7fc26c54cbf05f212fd3eb865f1f4d5eac9b7121bb38540c1631086a94ea0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QMFME2118653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4e7e2143c405d840a175e72fb41dc953cffa61bc10c216f5dfa873719c5905. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFME2118655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a251882fc2975df62bd7406be0c1cf1eaec4048f25471f83f1dcb90d9cd034. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:55Z), 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/QMFME2118656.
2006 Millenium Park Performance with Silk Road
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cbf7a99427022f0403c1b312cce75000d06a24840cb59ec64ff5cf372887b9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:59Z), 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/USWR40707801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c7d34888b8794dbabade29a30364a6f6c77a8e80bd5f26b343351bb0c0dc37. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USWR40707802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa566157d8e293ae22cfbbed967ae077095d1979d10d4fa10e86f2c9c17700fe2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USWR40707803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4921e43571216cb880d891ca41a357294a263ee3219d588c51193121ff81bdc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USWR40707804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b26e7140e579a95e13dac2b2ec75b09c6781418036fd699845ce0dbb0c3a6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USWR41110001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca1de5a20eec2deacb7f9db282fc98ba371287966c15d6923767159cc6d8323. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USWR41110003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f03920b887afb1a1bebef4c5a0b7d8c1d51911521676d2507769cc9924ba34. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USWR41110004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba8a113b6911523ba9006dfc658fd728a3009e11989b0ce5554813ecbe069b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USWR41110005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedee2f092d672db442c676046dc77089146f1b3f94847912eb0812d35b8d9ec1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USWR41110008.
Kula Kulluk Yakişir Mi (Live In Bursa / 2011)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb8cb03347f860ee321c30080409e5924fe999961d07b765224e6ff145f050a. 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/DEB331118101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2db71b84e6f5fbbfde4a559cb0e749c100dc363408e362001361790dd10799. 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/DEB331118102.
Kula Kulluk Yakışır Mı - Live In Bursa / 2011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149c4b879bec3b46ef3f575fef77676902232ae012843f71e7873790b5e020a4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEB331118107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c61269f4182d72db1620be3038077f4025f559c4311b30efc0a8e410ae784c8. 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/DEB331118108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa899c2f7430a335fa696b8d2c71d274d36b83b776d264ab72597abf7c9e05d59. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:15:19Z), 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/DEB331118109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa498fabfaedb2d5cea737867cef7ed1af2e8e6df9b3834e77380d252e42bc54f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEB331118810.
Intertwining Melodies - Live In Bursa / 2011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c5c9eb12c673c83296874a7a11bd042976bbef3b034406c214031b49c7af82. 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/DEB331118111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31880caaacdabd792e55f1d1feb777e41533efeea0e78d89fe1eb665ed9936f2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLB151900232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9713c5f23a2a53ad46b6514ad81bf6a90b409e8b968f1667927d07920483e8c5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NLB151900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2408f8500ed289620e1e7f7a7ba94217e9af3d3cc6e639d22ce6a8fc5a979b. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/NLB151900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf814628a037ad8b6f8727e0ea14a655b66ab0bd5f66dbc3165b9abdb8a5baff8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLB151900238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383dbf3701e01da3c51f9e764cc4fa515b14db6f127f36944395d5d0f3c27dd4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6TI2130105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca61bb80a1622d1c74c311cfa7747e5dd36e20795673c874b04e7d98ec8072c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCPA2201714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8a2b777562e5f94e839e8a6d669f6d264817a05d3895f08f90ef59ed50c297. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GBCPA2201715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad46b97d7e5f89d3e5dc8dffb18ece19a667d4a9e1644a4196a0e74260767360. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:18Z), 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/GBCPA2201716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32db45b1c392ec78778bbc3c7b2bd820d35b27e95332a805f507e369a55357ad. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBCPA2201717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c65abcc686740512de6c89515d1f9e017168b4910eb6eba5a4de52b7c8f2456. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBCPA2201718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f1a642e7a520c70a16437826061b0e749f9900a29cb4dc2353bd24f4d5c5e3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBCPA2201719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328d54368b89cd1c6d9e91cb469bc1057000db4dc25f2d9af63718667b4cb8e6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBCPA2201720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9ea031b397b70017b2127602f892523b93c88354b8e7e130944e1d3f69a02f. 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/GBCPA2201721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab7373968de5087bd831cc9d9545d0419ad47f4f65e4cb9d75c8d353e34016. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USNO10049010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab7373968de5087bd831cc9d9545d0419ad47f4f65e4cb9d75c8d353e34016. 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/USNO10049010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ae08b482a9e977484431b6c2465620d8c71fb6292403dfe27511460787f6f2. 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/USSM10702149.
Silk Road Journeys - When Strangers Meet (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7037aaa86c255051291074b54fa9e1cac70c7f00f47903e8cb8b6dbf6ea0db9. 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/USSM10111279.
Blue As The Turquoise Night of Neyshabur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd296b4e99dbae1c54ae99b57f5343413021cf347e746a50ce957c1bd69507ff0. 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/USSM10111282.
Blue As The Turquoise Night of Neyshabur - Edited Version
The War: A Ken Burns Film - The Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d98126e800045340fbf7dab041f5f43f854f0750872b6e2adb6f7014cba91d. 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/USSM10703269.