Hilmi Yarayıcı (born 5 February 1969 in Antakya, Turkey) is a Turkish musician best known as the vocalist of Grup Yorum. In 1993, he joined the Istanbul Technical University (ITU) Turkish Music State
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 0xb6d9decd08511b117b9d81e11c8263faaea043a442a2c5d071c3f3efd343da80. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d15530d8-4392-4387-be3f-182aa11067bd.json and https://artists.proofprofile.net/proofs/artist/d15530d8-4392-4387-be3f-182aa11067bd.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 0x9ea827e159264c15a78e21229db0ac42d10557fd0629a08275f8f25694e15917. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0330601931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7975051b3a053bf9dd5428f6448b239b2ab0ab277001ef477c9bd164b120e1ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0330601930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b25518a0296e37a0f096d0395101c5b079f0db7f32fb8dcfd5d52b2b747097. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TR0330601920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e61993d321ffd82ba3e39cf3fbb33718b04d3fd4013a6a19df1ad19849984c. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TR0330601932.
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 0xda8ede876a73ee65a17f9c52411efe3bc49e9752cfb445de886f95205ae58f07. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TR0330601925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87607a76cd6310b68398942748a34b574b37acec44b9575ea2067367aa567c4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TR0330601923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137b15fa4e934f26b14c064d4268045714b0c1ff713cd0c029e19255f446be1b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TR0330601926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a411a948aae73b9c3c0f22c36299cd243ea4588aa072fc019838feb67dd3558. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/TR0330601928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a6f77414a9621d2d5c79f24e6b97f2d3a291a769bda00b07b706ad449d13c8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TR0330601921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e969b9b86cfb13ec5c24d969ab9d4bce69989ea4c19f1e2252ee3d271067543. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TR0332112678.
Metin Altıok Şiirlerinden Şarkılar (Ankâ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f167179c205b5befcc3e4e24543d2c0a6fb55c4e1beffd22fedd92c8dbb7fa. 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/TR1591402422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830238bece69b6991699f88e62e74abce0a36198302ab6636e50d7aefb07e0a3. 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/TR2100600233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e67d7dd4b37663a543725069f522e181473ccd42cfa138b55c10616fdfcad3. 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/TR2100600251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86791dd3f90f3181aa334f825e81f70093dcc3cc2387309407a5d87de3a8a2c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:46:59Z), 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/TR2100600252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e8c391c66a14d1ad73a3b3b498e26641c538e636cb3620310d758d66dd606d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TR0221103290.