Kemba may refer to: Kemba (woreda), region in Ethiopia Kemba, Estonia, village in Kuusalu Parish, Harju County, Estonia Kemba (rapper) (born 1990), American musical artist KEMBA Live! Kemba Smith Fou
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 0xe02aea42b4bbe1ddd7f31cf5f0029b236b856d19180010ba320dba6fb476d40a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff367830-53b8-4131-a091-9be43c30e87e.json and https://artists.proofprofile.net/proofs/artist/ff367830-53b8-4131-a091-9be43c30e87e.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 0xf42e8b59a595d92a5cfed43b101f6bcfc14f342ae6b5e2c7279a4114bdd91361. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCACO1682906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4a6b319b96c2da3a8328a5c646e81c3582509d598915b45530f439f9711bd0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCACP1618788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aa80d8bac98667e4e6f4811946d975de20eb72f1fbd9517516ceea09549051. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCACP1618789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796078ba4fd7c0746051252ef4eef431439a7a4af4b8aa6bd60e972ff1ecef57. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCACP1618790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd207759a497c0d1509f9119bae55b80f3cfd5c89afb9eaf02fabd626c7e88f8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:08:07Z), 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/TCACP1618801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb084e7df70f22ce86f481a8d2f830e24736acf400a6489dc1d81b8e811e81cb. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USUM71819938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e9bce79a2f4e478ec94c59cb0ee1696d9827388d1631519f498222b389f42e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USUM71912087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5779df526a3e07c88b9a08e7ca0052dd20473aa7452b451eda98694b3b177a2d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:48Z), 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/USUM71915350.
Work In Progress (feat. Jagged Edge, RL of Next, Chris Scholar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170f4051f10bf70b82a874a8c69414c16eae44fbfa52077a26980e4081731af3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USUM71918334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd000e423e7a10e5626fea23c0cb402d123bdf9aabc202e233f3c03e7098e70. 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/USUM71918336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e9bce79a2f4e478ec94c59cb0ee1696d9827388d1631519f498222b389f42e. 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/USUM71912087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f2fe75453320b494cd2ecdae3d23a835c1667cc097a84c5ffdbe801ce3462e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USUM71918348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293304d2b6cdaf38f8fac861dc217778b9d763ed4c8f10cca662ef217626d500. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:01:58Z), 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/USLD91727342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75fe61584eb17f5d75b22281a3b7a297cf9d7a2195f011eca551f3ce568097b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAGI2238911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48df33d51326c552dab6cb9c4522d4b1a2c55c7613ab25742493079e22c38bc. 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/USUYG1284376.
Rat City (feat. Big Baby Gandhi, Nasty Nigel & Yc the Cynic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a0635fa4b48b676e9cf219c3b58fc5675858b33d66ccd725cd49f97c580450. 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/TCABU1407205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cde91f7a44fe6c9579ea67fb25d65123b03070fd010aad8a9d4a1f1ee29a079. 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/QZTV32246392.
Peter Rosenberg x Ecko Present: The New York Renaissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3130ba944876879880caeb7a6b64415e07337784195810b2005266c3a3ac5f3. 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/USLD90805035.