Seksendört (also known as Grup 84) is a Turkish pop rock band from Ankara. Seksendört consists of Tuna Velibaşoğlu, Arif Erdem Ocak, Serter Karadeniz, and Okan Özen. The band was formed in 1999 and 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 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 0xc31f666bc2cafc6ffff66a9a40e8a2424a6a2fdfa2c3fd6f1b73526621f5675c. 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/86437559-9de3-4ed7-9551-0e96261a1951.json and https://artists.proofprofile.net/proofs/artist/86437559-9de3-4ed7-9551-0e96261a1951.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 0xd6ee722f79a1a4c425560d25025dc88e9d28e0c67604c7d2b081b8a7324bc077. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TR0440601401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a840bb430ff3974ad0ff4b7b858394537d0be6d0b3821cf52f843677656b069. 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/TR0440601408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9257f318e914f9afc82b77f367777c97976d1465896648c46923072e69559b90. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TR0440601409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818952a44c3bb6552615e680229f84ef3ddffe194448e21ae74421a4d9d5cb6c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TR0440601410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7002b68cbca87f37ed989a966ef45a704507101a87132b03054f89e6eebf7c. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TR0440803203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98d570b4da2cb7d6c05500fd996a6d241e3cafff83a0d84f600067a77461402. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TR0440803207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4802e10de6dd2d0c9cb23ab819566c75617aca8daeb82f54d21db70462634. 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/TR0440803205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a57f475c20b25c287efb78af7c07f955e408b5b0640d976665fccc59379bab. 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/TR0440803208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd6a15124fdfe5f5b91fead672a73c622fcb6a21255f88690cb699f776cd78b. 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/TR0440803206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f367917ac7012ed7f7102766a454321e262fe6517bb7ef3de75a7f31e7c37e. 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/FR6V81749273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7f227638e3b8a994368d50df39ed212d404b7327afd767e793429e347124c0. 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/FR6V81749278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb28be1410c56edd0717e801cbf21738b113c8e77ae608f3ac125dc05b9c631. 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/FR6V81749279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9000710dee0cb8c338b3da086671e77c882c624a3e94e580d264110cb117b99. 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/FR6V81749280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcacb3610a6028218d91935b2f0cfbb85f5632ffa86c6f77c5dba82a2e69fda. 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/FR6V81749281.
Yazıklar Olsun (Eylül ve Leyla'nın Anısına)
Yazıklar Olsun - Eylül ve Leyla'nın Anısına
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706ed75aa2cc1350f140a35d55389b959fa959b96d263b32062616b365fee2b3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR0391800214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f1f7fcb15cca7bd6156786d754e5fdf55f77824a2512a237fcdd3a4551a515. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TRA162300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9390a5ec6da324a1913dc974bd63f883acaae926aa88b028c6e0cd0ca70e1e6. 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/TR0391200239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0b8926ebeca03e2cc83c0029f2b0c156eb83ec36fbd86ae3a3fb41eb92c9d1. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/TR0391400036.
Onurlu Yıllar (25. Yıl Onur Akın Şarkıları)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65be42109f27e4ea6b3f7711abdb95e4cece43e64ac6b09f072f30e7c9488537. 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/TR0221303489.
Ahmet Selçuk İlkan Unutulmayan Şarkılar, Vol. 2 (40 Yıl, 40 Ses, 40 Nefes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923db5ed7dc556fddcbad4b1db56e9cc09dddc375540b4e173f33723e482ec7a. 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/TR0391600265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f5b56363fff3f78ad6aad75d8bf021ddc7a6378a17d45eecd52dec73cf0baf. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TR0391500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9390a5ec6da324a1913dc974bd63f883acaae926aa88b028c6e0cd0ca70e1e6. 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/TR0391200239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923db5ed7dc556fddcbad4b1db56e9cc09dddc375540b4e173f33723e482ec7a. 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/TR0391600265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bb3756d4eee0bd2b4df53f6e301e3237d2a1c3d32980a4ca55a3d660c896f6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TR0391800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8341120153463dc3073aca5171099adffecd4d7b2fe12fa91a593bc419a5182d. 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/QM6P41713112.