Oğuzhan Eroğlu (born 13 March 1991), better known by his stage name Keişan, is a Turkish rapper, singer and songwriter. He began his career when he was 16 as solo. Discography Albums Aranan Adam 2 (2
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 0xbc330798573afc9a7dfdf56b146ace2a0195e23c2d2507f2d124f1c7917663b3. 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/b9b05957-6c12-4b58-a74a-bc4b051b8b77.json and https://artists.proofprofile.net/proofs/artist/b9b05957-6c12-4b58-a74a-bc4b051b8b77.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 0x3e3ab2e41e4564d99f34aaaff15929d0d918a8162648eb8340b0215b59a00ea9. 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/QZCE61882780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1bc0b04152fedf12e11b3533d61c5bea9bd033ac01af5babf6d2eb6ab3f33c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TR0061800352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eab5bdbba3b04eba60027b2919cfeef98ffc0b094248509e9e34e89c7d39316. 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/TR0061900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2710861ff32d1b04759e08861aba8dbc2ae8e12c754750d4cc54c34aae13b9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TR0061900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1bc0b04152fedf12e11b3533d61c5bea9bd033ac01af5babf6d2eb6ab3f33c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TR0061800352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19ed089a4ac5a3002f496b29d5a3c9e3d04b506a5e296ec9467665e69628e08. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TR0061900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc739b3c49e90e6bfbf92a7507f0461a3a094339fb312493919540367a142e0f1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TRA162000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc739b3c49e90e6bfbf92a7507f0461a3a094339fb312493919540367a142e0f1. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TRA162000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4f2549bd04e153e1c00798250edf48c62d6004e8c30a5996ae5745aedde4e9. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TRA162000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4938e3b7b2faac22543635263df53fef5ede195587450a4eee4ee57fbaaf0c0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TRA162100657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291669d61e84f2072f980368bb9510957580b8add8c76870a7fa4fb8f8f7223c. 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/TRA162200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd31565801a130a2bb2d0fd7279d098067c90fc4e3f77496427b2e739034995f. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TRA162200435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382149aa89d2d5af92032691e2f6f1474c7434a9a96563ba0774eb33dfa0b4cd. 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/TRA162200436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad212259e64fd53efeda4a6dd583b97796f0d2d577455d4531337dfa64dc8e. 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/TRA162200437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7789872a4812d99ec52fe572d16e83c528da0ef0da114a97450184d1424a795. 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/TRA162200438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14409315df989f3f9cb9f7b6bd70d02a4c64df7c1d39de341d4a768fe6347df. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TRA162200439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb20a5ef5244cdfac528a1fca61417fac85291d6984485ecb894ea41ba3532aa. 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/TRA162200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd30cad288a8602d7d5bb3ffe65392c137ad65a5c6292d2e5cef7fc3beae708. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TRA162200441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050d01fea6330c2172b3ea6ffbe45ebee89194dbd7b638ee198b23e9ba37edb7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TRA162200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ef3a15fd0245d7dfd21cb220f68fe612ee727b09702bf808e1cff79f3cc510. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TRA162200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291669d61e84f2072f980368bb9510957580b8add8c76870a7fa4fb8f8f7223c. 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/TRA162200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5e2a80f1236ed3f411e87399bb146f88d2feb1e47bcbf5c5ec17c3fe26f887. 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/TRA162200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05db55ce2ebdb77aeff73e272ffadf04c594d6cb0f9fd4938aa944dc516c460d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TRA162300822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcec1f4981bc81e3270f3d2e2fda482a3158dc0d69d705a0d6343ae898eade38. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TRA162400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78244b49193c6538c8370207797a3973fe1c026ee82b490349afd248c92a1801. 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/TR0012400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad415d8f07f4659012ee8dd4c2da13449941c8fba7aae26eef853355552dceac. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA092441769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c0c46cde9d044e48465e8dd4551bd047817886fc344aea787b89a6ca388f39. 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/QZTVM2488349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6336dc2126fcfd4ff5c107df916c4ad28cd5ea560678acee680c51f5004531. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZTVM2488353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6566314a4995dee16ab7715bce9699e96b3fac65f6d27b30002582e5b760a7. 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/QZW9K2460073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e71b059dbd041fb2e1f4f3b28e14e9bc7435c9e35f45b787d4b5ac7b9db67cb. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZW9K2460079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a9383c9e518497ec25a66975bfdd878b104bc15d690e765c8b04fd49fad9bc. 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/QZW9K2460082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd9500f244e0c564db63b87b5bfa514af9646d6e75562ffcc39d1a9d8f1dcd7. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/FRX281978248.
Olmazsa Olmaz (feat. Emrah Karakuyu & Keişan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede3a71ec5475976a94f28fe1fd79f97ae637fcb2a39e7a89779fe0ff170e8c6. 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/TCACK1594914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62794d7efae85ae0553e1e6ee6e75a26983ec2f136504981d7bfa5ff9d9eef3. 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/TRUM72100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c4ec9c887dde0bcc50a24381cf8fc46dd9636673fce79bd197a57d5b412451. 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/TR0441311701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3f2848f3d7ae1ac7cf74ffe7e679ce616a656af6ece32571def25267a1c80c. 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/TR0441311702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a7ba2009e70eab305467a688ca139aaebd6dc2e4382f9e49da0c8913d7d81a. 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/TR0441311709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a6de27a4103b28b9652ca5cb12995fbf0d313179c02ff82f54aec6bdcf8e31. 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/DGA072434139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82e23fdeb3686c73bbd60917e14817f003b2848c1b0ffeb72771bfad628411. 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/FR2X42228404.