Kesmeşeker (meaning sugarcube) is a Turkish rock band, founded around 1990 by Cenk Taner (vocals, guitar), Belen Ünal (guitar), Tayfun Çağlar (vocals, bass), and Melih Rona (drums). History After bas
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 0x45a05982862d8ac7a6c5b1e08be6a32af343701370a6aed016ea14575325b5f0. 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/e7108afd-31c2-4685-8da0-adb07ecca369.json and https://artists.proofprofile.net/proofs/artist/e7108afd-31c2-4685-8da0-adb07ecca369.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 0xf57e20b751705552e820b17743f1a85eed0b43a2ebec0f24a8154ad960dec849. 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/TR0380606331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1452e3ceab68bf4de2645657818a08f49e38d43fbc371133cfbf2e2136dbde04. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TR0380606325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa113e671c6ae578bd2538760b674ad6050e90a6ef75305e376efc435de0ffa37. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TR0380606328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd4b5c2c5b80e549777e926bbb36bb9baa64df386a7ba37947d8223632b53a1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TR0280600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd789baf77dda7cce35cd138403bda9b00eb2680d6e3373beb15ce3bc5b453485. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TR0280903911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63233d7a87955cb018d50b72ee8a3372aeede6baaf03263bf3ef4ba5d85f21b8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TR0280903912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8cc2bcc012344d56d05fdcd4dbd75666d8541ffaf3e470b9af28ebb03b9aa9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TR0280903910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57102a6886d50ab4504b31e8b3d5186315c11dfc2cfa5a8efc92af285cec8d43. 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/TR0280600605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79b0644b7a98862fc05c270a18b5f1c196d0f177bb0a4714d27b641a9092df1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TR0280600606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84dec31107093f8544e7f5838c978f4aef3709820e38e8bc6a63bc04a0f7384. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TR0910600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61d52969e57de18e8de12d461f4350b2a3aa2244d35b68ddfd1c6f6ca1349bd. 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/TR0910600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaef863f7772b1215286bab2521f195baabeddfe0f35b65ba4749000b62fad0a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TR0281104536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a63824c98ab614ddf824689dc428cfa951a41eacff14a355b75dd1a0a833558. 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/TR0281705759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57e20b751705552e820b17743f1a85eed0b43a2ebec0f24a8154ad960dec849. 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/TR0380606331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a20c9b895730fa04665b7fa4a0b89147d7a9487bdac80a566b184f985fede47. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TR0380606329.