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 0xe5a64d05ed264a6eab49a1864208c0d9527052aa321a77b7c81117cc10ab29f6. 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/3846dd7b-e5c7-409f-9e34-211c0d1fc941.json and https://artists.proofprofile.net/proofs/artist/3846dd7b-e5c7-409f-9e34-211c0d1fc941.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 0xa0a9ce03f4b45da2d9aafdcc87e1e9b48add11d640fd1c1dca5e71b046073b72. 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/DEAX12000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377093994f5557c8f51140a28c177e94e021dbefb30a2d3bd78fa75dd8f1f4b3. 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/QZRP42425729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b499db17d2ff8702e78db08b61bd8efea1d698f8518a4c4d08f07dd702943b. 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/QZK6K2443079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5665cd77839ff6466b45aa3fcea894f0b51f77d4b9b3c7a989d5a0fa4b91aa2a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6N2489767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31adcfb5f26d4234e7ca5b8e74852623b71ab814bfc69fd068aebb91ea5d8a5e. 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/QMBZ92395422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356c9e6a6c95823bebc63f97347d00221f21cba423ee63d69d4981cfde800fb3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM4TX2302316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b36f77d5ce41e7accc0c8c81fac8224fe30cdf50c042df82930cb11fa7a0292. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBKPL2209046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e9aeb85d3d8175a3856c4bdc56e67bd94c53aaeda85b955523ab42df3ce43a. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/GBKPL2204988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3f4c3676c6c8ce27ee8a1bab3e651bbe42c5a5330e71064e03dd5f67194e89. 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/GBKPL2297191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85684806e172a061eaafb58815e047ba32f3199a00c8c0edac5ac8624d2f458. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBKPL2287725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd62e2a693c45e454278d094d781100c6c0e566579bc8835429116123cfc77a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZFZ72259304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9af781979b5366d2a58f56b7fe2725e3b6d38066694768da76afb9193958548. 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/GBKPL2176641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5830d5ddc53c635306bb7234a9b8e65979d680ecaad9e272dac446b33ed9b1de. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBKPL2171016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a332c799fad4febc9714cf7619aa70eb342c42c8f5f1307992f86bf6ceb8b5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKPL2167830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a16a0217ab6ae6285b0a58a0d27e516c489d606c4c4665b1be681fc91391f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2164542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda114c9647dfdc98ec2a9ec42790cfcc2ce0d66a4959be470d13308ca825a219. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZDA82157979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda16364dc8c7f038ad9a05e47f41738fbf31a60b54c9cf6f4d2b815b3d113f94. 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/QZFZ42190441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709ecb6b7f5a7168d17dfcb3e0ac0ae1bafe1e9881643a30791556797dd3fca8. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZK6L2031169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e8c7b907a2b9c408278dbbff286f5084e687c4c183404a186d2dc7728ce05d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES72028253.
Can’t Say (Word Like That) [Tonreich Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f40035d61c4f450abcb45906363d9cc221a7d1231925653c973e0689bcfd0f8. 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/QZFYY2001881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00695b5943c450a586f018fe6018d953c0b42ed02f5b8efc24e3fa4afa5df84c. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/US7VG1833180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd576d9f1a09915870e7199093538ef5d5b10b6fcfa2797094b148d71a46f694c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZ5AB1885592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60989c14a8b768b7247f50381c157162a315cf36c0021feff11370595dc3087d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ792417365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377093994f5557c8f51140a28c177e94e021dbefb30a2d3bd78fa75dd8f1f4b3. 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/QZRP42425729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e56cf965502dacff9d4d5b91c0265cc5bdfdcc1b9a74eb4811bc923d3d6be8. 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/NLYK92400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd8f6581d3100d88f4348ebe0124831ad51d269ef9a49721446dec93f26115. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFE2404944.