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 0x0af7e1b59e5b260ca3d69e27708e1a0548c858748b6e6d2294f4fb872010ec72. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/503e696a-22c7-4f5e-99bc-1fc5661c1db0.json and https://artists.proofprofile.net/proofs/artist/503e696a-22c7-4f5e-99bc-1fc5661c1db0.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 0x4375385d7600dcc01472d826b3de8c5fbd44869e0c615b04fe1b0fbfc2f32f3b. 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/BRUA41800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f04016ca9152df24ad2ec573e762f9bfc67c287892df5f02222eab2e092362. 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/BX39F2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde9baf973af8ef8ede039223c808f31cedd0e8e65939df5c5553ef77bceb87. 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/BX39F2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee65ad21d814367b11a36e6f5721f24d7f7faf0c55b2d69762bf8266dc20528. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRRNI1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cad518697ac3714a9467df54bd8788b52c52d4521ae9485cdc6ff6875429b5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRRNI1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa129510ac31d411b4d171072d273d8311ca10ab94a6dddad347aaf6894037ee2. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRRNI1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10082a96ed3d762a6fc27431b752d69bea6cfc0e4ccb254f49fa01f136b022a1. 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/BR12P1200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fea161fd566f7a650720b89b9a6e2bbef11fe0871f08c82568a1c88b31af208. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BR12P1200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee1e119e56b995aec1ee218315acaaaaf314d54dfa16dc314f84aa2c66fca39. 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/BR12P1200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6041e213d488a0de45156033b0563146dd9abf26292ff171dab22a1439a797e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR12P1200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b419feeee3353e6665af99967ffe1c98a33684a28410be03cc9bb3ec2b2883e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BR12P1200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c99c9bb16c2cc6657345e77ffc365b40baa84685a9b9b81f2b010ad8e06bc03. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BR12P1200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38464d20463b62d67f60431008e2184a9ba0432782e2b2c6ac2ddccdfe2285d7. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BR12P1200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa592a8a45b5e3b7221209871424a90eeb4e2c7b83c394d03ba9a3be9dd5164c3. 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/BR12P1200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbc31115f68dccb5a14d30587caeddcad766882f95478e21a7993306b6cb5c7. 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/BXP4R1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946e99ce48b3b553f7b9aab336c42fcaf91fb32a95b9db728ab29fbd0bedaab5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXP4R1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268958d89a625405370d3b6b44d32fe29b62bad30d9c76d9f210b8b24187e5e3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BXP4R1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1365403d6d24f1d4b598559920b93a8a025e280590c52dad0a899b79c9875e60. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXP4R1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e9aaad85d2c3c0c1b45dd5678624e425e61981c9d381d2ab28fa0fc42db1b2. 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/BXP4R1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9331e618b89150edf63c48862e2e2802818648fd3415ff399c3fa20b1e456c7b. 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/BXP4R1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96714606f8d6f26df1754c1189380d415b9cbd44aa54cc60e6a0e4f5edff6fc. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BXP4R1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e3322d3c1fb3736e7c17c644e6e0754e23e8de7e1e868b2d4dc641fc0b1703. 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/BXP4R1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bee0d0aea0aba56985aebcbb9b3055617fdb196acc420e04758937d9413683. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR6LA1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeac6c3d7f630d817af8e12ed0676885bef110649a5fe3e2b5cc01ab5b52512. 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/BR6LA1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14c21e55ddc5e824fc112c66bc2d7dabdd2085b1d372b791e252de8b717de89. 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/BRYAN1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437b89999fe3ade43f36d1338beef515e63f7681f8a5a1bfb1323bd7b833d5a4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRT2F1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1874e437b59365adb7e80c9f94422d79f687e4e267cefe1816e5367840473bf3. 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/BXJ4C1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a247f9e58fbcbf450e6dd10656dd7e55a4dcf5e3e5de97274c7c9d1d5f418b. 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/BRYAX2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c070d499b756a82493c65c4f9552bf9796127fcac18782bdc6b7765da67ffd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BX3LP1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d68b39ac159166f5a1fe6f6d2fb1a7bd26adc047ea9a22729c348311551448. 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/BX3LP1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7628e769227824e95b9a92c4312b2b2e0642fb7a81f77bff4d2c1ed81ef5aa88. 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/BR5W51800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7be219b24029065da581475d2e1a4e0d56b17222b208463e6df8c858f1bee5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BR5W51800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e14109304c18fcf5cf4110a875596018671b373c5ed4a40e9d8630b21baa26d. 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/BR5W51800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a458f40fd1f4ffb7ded04f6f213eebb91a087dd4c7ee42bfbdeedde95c0067. 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/BXGGI1900008.