Yurdal Tokcan is a Turkish oud player. Early life and career He was born in 1966 in Ordu, Turkey and attended the Istanbul Technical University, where he graduated in 1988. In 1990, he was appointe
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 0x9d473794b552de349805b5ead1fb16ab54c76f2f8b37fb3dfcc2e8a771c536d6. 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/18af7352-bb6c-405d-87e0-ffa461197af2.json and https://artists.proofprofile.net/proofs/artist/18af7352-bb6c-405d-87e0-ffa461197af2.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 0x6f00a5057f5619fbf8584fc123b04edc929418f9e7b58110764446af02565818. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TR0951401725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095d602ac481521d9b3f5ff5f6c2d411917a40e333b5807e82b148f35778c8db. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TR0951401727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3696908f442d7fa27d425e1c3959876c4de86b59b4873f384d31ce3e4b8ca275. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TR0951401730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642b1e1f0a659e7458c654591994d0456894bc0791da6bbc4b02d2735b536818. 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/TR0951401732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe617e9105ef8273d5bdef358f9b1daea26ab4502cfd42a124e152aa1012d5fca. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:00:52Z), 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/TR0951401734.
Marche Ottomane (Manuscrit Cantemir 209)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccc90d485a3a161fc6920d26f530411baa748ea724219b823fb27a59e22560c. 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/QMDA71379903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8576f88b252d046ba1dea6759fb71b022b470d43229e31c698332d20f3cfc84. 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/QMDA71379907.
Küçüksu’da Gördüm seni / Tanburi Mustafa Çavuş (Ottoman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97181a195c33e86ce7c23097b491b7854123bfcec15fac568e4e9f882cda68b7. 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/QMDA71379912.
Selfo (Improvisation à la Clarinette) [Albanie et Grèce]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d2a156540bfab35aa555c5a9d808438c4be4fb1509ee86389ef3b556bad2b. 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/QMDA71379919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c096a73097a088ae3acc348e9fd14c8587954a96f98cb1fc585766f3ebee9. 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/QMDA71379949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40046c53a0a840618e892fa6fb8d7b84c316d84750dd51b5d23817254d6bf495. 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/QMDA71379937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dc02b2a24862a52ac5828f6dc57be620ea37c7416edff2c191b42d18c13dbb. 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/QMDA71379904.
Zapjevata sojka ptika (Ramizem) [Bosnie et Turquie]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e54b80653ede26386109fe8748a367ec8d7282d3dbda96680129d06da1d1ee. 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/QMDA71379916.
Dök Zülfünü meyoana gel / Tanburi Mustafa Çavuş (Ottoman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102dee3a0652d435a168a9495843e18d8f396d9ac500a2a0b301cb0217c364f. 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/QMDA71379925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98746b6173ee7948f297be6b150c36fccf5cedc9a445b6f441c5060095a7a74. 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/QMDA71379921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bfe6de4cde04b1f9c17728a70c6fd35232c906e721c5d0bdefcfd266b55428. 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/QMDA71379927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe774b43ff05c46e496f069b4adcf8f95825e0e9859bbc4cedc33cd9a7fb9ab04. 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/QMDA71379931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac45b5f93f1fc954856af637ec880fbdb1c4951b661d0c23c01f1b337476011. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QMDA71379942.
Segélj el uram isten (Chanson de Mariage) [Chant Tsigane Hongrie]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612ed012ae15b25eb19240023b5811cfa3b1748d5e6b24b536ec1125a4d2a8fc. 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/QMDA71379918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d650ba553b06d97f2eb05f4c78edc00dcc8afcaacee369e64b18b16a331449f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMDA71379911.
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
Moma e moma rodila (Montagnes Rhodope Bulgarie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc0dfac7a1325e8fecda2207be54ca7c26e031a6a4923ed3c607c07bb1a35a1. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QMDA71379913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe810eda58fae5fb09a92af3097bc896cd5d304be18ce156f1bc2695b7b76c97b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMDA71379920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb82b0b5286241d3f180fc8e60298cace29660a2d79e255acc6a4ec0d5b8f1b8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMDA71379924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fa685da199b94932cb196c9736ab9fbe7d3a953a52bbcf2a5dfa53045a8d86. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMDA71379948.
Taksim & Gazel / Poème de Fuzuli (Improvisation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4581e40efd41d600f90867fabc9ec4b059cf5b3a38a92058b1bf0daa09d7a2f8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA71379934.