Nükhet Ruacan (14 December 1951 – 6 May 2007) was a Turkish singer and educator in musicology. Life Nükhet Ruacan was born in Istanbul, Turkey on 14 December 1951. She studied graphic design in the S
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 0x65a4cdd6ff11329920026a92eb35126e19322a719c974af24f18d4a30b600c9f. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc167100-2a1a-4254-934e-641f07171eb2.json and https://artists.proofprofile.net/proofs/artist/cc167100-2a1a-4254-934e-641f07171eb2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bülent Ortaçgil İçin Söylenmiş Bülent Ortaçgil Şarkıları, Vol. 1
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 0x2197f80eb631e4ae4a400c1200e220d9fb5f313cebf819af621c6ebadad13ff8. 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/TR0280602119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135fad65ec49a6da72acb6dd7a0d286279499311fbdebd2e97f88fd12205b256. 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/TR0280602120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5491297ad125e4b01f70d8abc79dae475872ada1b4652808e2a8715189c74033. 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/TR0280602121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19da254dae9a6512b311912545fe90cd6cf941f7322eadebbd98671f7cb33e10. 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/TR0280602122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf3feb75a2f9be0e0031ed228f824aa4c9eb05c6ba0571a4826024d3d3469e9. 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/TR0280602123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47154c594042bfea2814c29ffe5147bb344ef140f776000ee25515559d198ffa. 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/TR0280602124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb17e8644024a41b7ce6b6598c29b8ae4a217a4d8b4c22264d988cdbb7beecc. 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/TR0280602125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c92c228245bdf6f61950cdf1aeac03aec3ef86790f7dd2c9a16f527246fa930. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TR0280602126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a75427765500578aa7bb56423222d7120110692d876a8dc7c20aeb1c5d312d7. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TR0280602127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31b91afa59eb9595ee6336b13453ccf15a5d62a80dfd33dc0c640c2c240c495. 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/TR0280602128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbb324dc6749c389b1f7edbe3d97fd95dac77212c47ca27faafca85dc6f8ba8. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/TR2160600296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82b51e04a67748ea4c8312acaa5f7a4de702d86685d053687a15dbf53596cc7. 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/TR2160600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe769ce24f6ae4c97d46b599ba6be8554e29df099be9e1a592874efe26dc8e087. 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/TR2160600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d705fa37a4ae5959bec4619784eb7ddad75b0072def9765b760c71041043d. 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/TR2160600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b4240b00a4862328510c930fdc7eb487d5ac658d0cfbbafabf4e6fbf8bc9ce. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TR2160600292.
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 0x54711c10131125d953aaf2edc6ce364fa9f510652923e58760e02a6221021fbe. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TR2160600293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45897b1eb5c58822b1cfce90f969823b6ff2892b74718afe60257d9d118f6e3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TR2160600294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13ca5aca026f17ee20ab959b7aef00a86ade6f97a288f8bc39edb0b9812de50. 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/TR2160600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62be47c1fd60e0d5d6b6b768b145dd1a97d7bcac6547808bbc03f9c7bbdc775f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TR2160600297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256d3eed9d2754972a86783fd0da9f25dfb619c8bd08655c0d9b5bba56e5c72f. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TR2160600299.