Eftekhar Dadehbala (; November 16, 1946 – June 25, 2007), known by her stage name Mahasti (), was an Iranian singer of Persian classical, folk, and pop music with a mezzo-soprano vocal range. She was
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 0xd49af267ea08bf6b39d93ac47234b6b66283e9490221f9f1c7c4020e2d3747a1. 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/040f61d7-4037-40d4-bc20-14d35c46fb52.json and https://artists.proofprofile.net/proofs/artist/040f61d7-4037-40d4-bc20-14d35c46fb52.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 0x524622db78279995897d11edc3d5470de6e410eb7e24bcc98975405b61c3f4fa. 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/USPUP0810929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77466476b870cc4892e5d66b7aec37abb8513687270130bf3abc805f1bb8d1f6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USPUP0810930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25848dce4a4ac93fbcc0bd2acfc794bc00534d92e969526d7f02991e3e571e1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USJ3V0892697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccddee0483269cfe7bd674f8e8618f8b7845a2cc973c5188ca691d70c14a0477. 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/CBAXN2202907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adae1e5ee8ebfe13384b0154ece44ec9f44657e896bc919397c31d6138dc84e. 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/USPUP0813483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c5dfb707b884dba0157dc7d4125731066a8fb18e64fbc27e418a647c7f7786. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USPUP0813514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c400ca237a87a0a20dd774aacfa04954ab4a4dc333a1db4e8f0e19e545b7a19. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USPUP0813488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6be86e4046dd7cc40f5acfa3c908bf5ce995846a957d8a70200a1a02880393c. 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/USPUP0813490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482605de0c039a9d596725c121703129b248e53560cf745f891298c752398e7f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USPUP0813491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7372dd13a7b6f902c2aaccaef96ea60e40124f25f11397c64a774e5d4df7a84e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USPUP0810918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff2b523c2c886175b7cb4b8fbb9f2dc4044afaca4c23dcadc7f92edfc99012. 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/USPUP0810921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6a9a9ef1c1f9aace66621bb4bfd923be501c9594487d7a9366845e9cc84571. 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/USPUP0810924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652495b510b63058a3d2971a3fdb4562d8cddfbca05440b80efa1ab7fbbf99df. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/USPUP0810916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee9ae2d92d707727b4cf16e5d3e936f430c071f120612ce8584d99c880eb5ef. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/USPUP0810902.
Saraye Mohebat, Mahasti 10 - Persian Music
Baroone Ehsas, Mahasti 6 - Persian Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625cb0bebd9d09f26c74a07f08eca818f927de63a2d8300e245ec01f8f70995f. 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/USBMF0928416.
Del Migeh Delbar Miad, Mahasti 5 - Persian Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380b5d1056f660c1e61abfae822c5a0468d666e28e7ca2ad53be540fa72eebfe. 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/USBMF0928394.
40 Mahasti Golden Songs, Vol. 2 - Persian Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c501e7227840d2f8e2105ba4da9a73ec973e5b9818d04986d3f847e470508d7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USBMF0946101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b48f051542b2a57fecb58acc77642723910d84193a0d9913d3154bcaf79e0f. 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/USBMF0946103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004534d7797deb52d31d74c7ebb9afd07f2d41724c535afc1516d4ed845246cd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USBMF0946106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63298188ec82c4ec665e182b19e1dce515d6b88fcde9ae0992a47556f399b9c2. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USBMF0946130.
Shakheh Nabat, Mahasti 1 - Persian Music
40 Mahasti Golden Songs, Vol. 1 - Persian Music
Khooneh Takooni, Mahasti 2 - Persian Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f91c1d4e21d834789254657d64df74945403b901654968452160e8a097fe899. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/HKC371023225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc06dc70b0ec842a0cf7c08768f378b742132d2a359b547db711b3b701746e5a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/HKC371023223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d357baaea204591d6802cd9173f29f42ad9b5d169842a1afef79ed0a0aa822. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USBMF0946116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40612ad6300833edd2b8c4120d46e362b825e90a850f1dc39999d743cb0411f6. 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/USBMF0946112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028c299f8a5753bb748de04bfcc42d192808b35e47d8d6ff62aa2591514bb4c4. 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/USBMF0325111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db090a090bc1650787a47d788d5d47b7b526ec03bb17e544e2a76230e093478. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USBMF0928405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258731d87f249988eb14c216977d1103c644443a15ff61743519ac7167d1a9df. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USBMF0946105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6763a9d18fe2352b1fdc18c9f4afc5550fd60d194d9ef1002b0538f10366cfb8. 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/USBMF0946140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e125a30bec6c3d2fbebabc8ba9488a8370a6dc45150be7195c0d872aafd94b. 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/USBMF0928351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48ae9fe9cb0bc7e20d239278d1743fbf1392e1c4be0db102af2f2118011b300. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHNA2525608.