Tasha & Tracie is a Brazilian hip hop duo formed by twin sisters Tasha Okereke and Tracie Okereke, who work in art, fashion, activism and music. Tasha & Tracie unite rap with funk carioca in their so
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 0xebebff7278a485d4bc3db21fea33059b327b5eb94efd8e28aa8a9cca9742f535. 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/fe55523b-4fd5-4ef0-bbd6-58872fa87a72.json and https://artists.proofprofile.net/proofs/artist/fe55523b-4fd5-4ef0-bbd6-58872fa87a72.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 0xf66d9d06be4740da05534b7bcad6935020ca358304ecba9292699f0af4a4c36e. 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/BXB6B2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e259395eb92c20476214c3b248320e104fced28a351a07b71c49b1511526c. 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/BXKOA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2070a27a69bb7aa10013a198b029807561031fec30f1349ed8cbe6537ac194. 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/BX46W2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a4e04d01260ff68fdbf55ed808dbb123b0c9269a9f861602d885274210cbb9. 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/BX46W2100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e1a7dd072ec07c52c9dac25ffc59a9a6ac55303f11e9f0c73a1c071848c0bc. 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/BX46W2100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7dad041b36c8e910b2393d2269ff6a74a0c54152c44678402517a42c682951. 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/BX46W2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004cb93ab65fdcac862c84f4e8b1d526e07be151dc5d4212f7db276a44627ec2. 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/BX46W2100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc298fdfdedd583f13b19b65f2798cdb547e4b52bcb87a045d65a79c93039f4. 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/BX46W2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8cc7c229981ab79115258683cff6a0fbd84900959452e2f4014376716aabae. 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/BX46W2100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ef505980eaf09bdbffac9738641f384cf325108fdbc7f1f733b965d7b00b93. 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/BXT7K2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1666af6dcfbfbd6ae573c74ca8ece03064b8e46a5ed8d9379f9365cb2a16cdae. 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/BXT7K2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d491dd319926f559841c6d4c239b4c722caf2b5208e6dc9f3e3796acfe7a4a4. 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/BXT7K2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dd117c63b9742db769de0f54bc742758dcebc3e04280267c3b8f68252c5f92. 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/BXT7K2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e8372294128583b0568c499f6031a6f5ee258bf622f9d4edc8c6726d2e9f3. 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/BXT7K2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e3af65c9f0739bd53a07ce384a7311a70934fa6964c153c37a55e81ddfc6ac. 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/BXT7K2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e3fa197a44e753d10ee1a37a362e0558579351e1df97973e1cd8c418673d31. 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/BXT7K2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9de64206e5a79e5a6a8021005f5ca7d878949f1d4d7e1394918a4ce89467373. 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/BXZSC2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b76da5f67d857c4283948dcafbbaf401f7b7fd4189e13e6e20a386057e0dc8f. 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/BRWMB2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1dce92dce6fd66da1c109f50ad734dd774aa92bc1ee41a9a00a68ef6ee4434. 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/BX46W2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414d8e731d9321be3992ad0d119d710d8a6a8fa69f35a1690afd4479dce19d3f. 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/BCD592200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc298fdfdedd583f13b19b65f2798cdb547e4b52bcb87a045d65a79c93039f4. 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/BX46W2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573219ccf01c9e3b1a0a9ba2ef5f44b3f88f85eb29ec5e1b31c240b036f5c890. 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/BX46W2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819175d5fa632c5e9b96e01435368a285fd2a5a6d22298e88383a8b14ab53fcc. 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/BX46W2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1a0db621c4b637deb2f936abd4093879b6029f08b0169e9a3a69a48eef3428. 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/BXFLW2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f21d8e3574cd5188158a62a7df740bbf6864e9e6c20f515805c0c112699b9d2. 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/BX46W2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538bef4cc1a71557ea892f035941330d54443a3aea03c249837bebd5e4e52c17. 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/BX46W2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd336aba9350076efba83c76cf7292f31ae867fddbfab4323eedad4a5c06464c7. 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/BXN9V1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb269d94038173c6ab5ee3320a6d666fa3d352b4c67c9ab0b1ae1b283f223c4e9. 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/BXN9V1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9e98599cbcf6539a01204c72b304fe927879ffc7363cc2156af673f6fd3a49. 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/BXN9V1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc07d7f0204437fa8665682ef841622d71ce49bf1b69e4011a603b705595a4b. 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/BXN9V1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e2e03706891d9e28e24ff80c763a0a0c6c8cbb27426eb910f0bbf201c5bfbe. 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/BXN9V1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc081e5ff0c3357b57b7f39c15b058cc29c922cd29ba861f1b85dd19cc6ab85a4. 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/BX81V2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c72d25010ac1fd5b5d84d9f60ea09f42b5419333a72c893f9829bf3f52b5158. 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/QM6N22454640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef82999fb44bc41ccbd7f781e5b41d0e3cbc5879dd21c23426c7fc60dd15cd0c. 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/BXT7K2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f07309256d3f348044d092ba86c71787e716ec933cf4df7ccf82f80de19572. 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/BCM9A2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ca9f99539ff8cd537f3febfd5fec127513f4d639aee42708695cce2854758. 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/QZHZ52141500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b9e426025bb5098ea8c48b32aa016a5bd45d7b2c42c27f0e71a8850311e4b. 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/BX46W2100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66d9d06be4740da05534b7bcad6935020ca358304ecba9292699f0af4a4c36e. 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/BXB6B2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de8331246e3e7424adf0c2d8f2bd4eaa228382e25a67ebde97b2f027833f44d. 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/BX7AM2000038.