Demet Sağıroğlu (born 5 December 1966) is a Turkish pop music singer. In 1989, she was part of the backing vocals group with Kayahan who bid to represent Turkey in 1989 Eurovision Song Contest with
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 0xf7544f909056bb0efa25ad3e6235c3bc4b7c997720008275918702f7631d0b33. 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/27c26b0a-5a3a-48ea-8154-16b6d00d297f.json and https://artists.proofprofile.net/proofs/artist/27c26b0a-5a3a-48ea-8154-16b6d00d297f.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 0x3cb29a29125c7742ccc21030c7b51b54b0c86eca72616e4d261f747a586c1320. 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/TRA160000498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96188f026c6aa167b0be8dc926061141d3ff96b0c04b855a0481f47b3c0074d2. 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/TRA160000499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f0a92277761a10b750f13c799f54ff444cbc3db6a8f64324ceecf21b854431. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TRA160000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6a73e84848f6acab160fff5369547fd2d3ff3b5c9b4e00ad7b25a8869629b7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TRA160000602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcec683fdb662354bf05747f6a61d160171c46526701345a490fcce6d6fa585f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TRA160000607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7842615b89a7901ecbf8bb08596e9f1f3525f85ca27315c4747abcca1b355a17. 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/TR2611201091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568c1882a178356c087de298ddcf73dd021361b05ddf4ffe71d01dcc8c73542f. 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/TR0020504301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5740c69e36e29141863b98b47fa6f0eb34ad8d7a16041595bdaa46b58a6f626e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TR0020504306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8754bb11c62cd8b89cf8e76bba0696dfc115dbc28409ed17df2ecb1cc42126. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TR2611801966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac27dfe266d2420c4caf4782fdc14abfadf0629acffd14f9618b193479f9df6a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM4TW2426532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa55885a7db98dc9c744e7d583cf7b8ae9bcd119fc288b7f5e8765daa8b361a. 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/QMBZ92452298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bd4fb64138a54e6924434a8fb98d1394b60030c82eae7439ed50af3b42c96b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TRA160000500.
Metin Altıok Şiirlerinden Şarkılar (Ankâ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cab0b078811fdd050821fbd1da8853f3a69be08023c70b5af6371fb53473f7. 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/TR1591402416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fdd07088c041836d2e1dfea01de193e19953eeb367fa3eff048cf1308e60a5. 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/TRA162400688.