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 0x56c20da77264a3a82196607eec8485b10656222e4d3edcb1f3e7e3825f12feb4. 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/e86a368c-1099-4d33-8239-8c3e99c53ac8.json and https://artists.proofprofile.net/proofs/artist/e86a368c-1099-4d33-8239-8c3e99c53ac8.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 0x03133a7dc5a006ca392d6ba0c86ed27e2b350056d8d0ecdfea94abc48ff0df56. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USDHM1506843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa941a63271d90a63e4060ef6de896bf831590a5dc6c1fc2b25ed0207286f9a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USDHM1506848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee5948950f70b20b07be8e1090b35cb9a77a3f7d2c30bf26e191917939df39. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDHM1506854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113b176436a80ad3e582f58acbdf4b45c77df2b8d4fb5eb3e14151922ab25ab2. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USDHM1506858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4611732c9be717bfc96e2af0b2b17187b50c233ecb168b70a7da0ba0107e1d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USDHM1506846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa941a63271d90a63e4060ef6de896bf831590a5dc6c1fc2b25ed0207286f9a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDHM1506848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee5948950f70b20b07be8e1090b35cb9a77a3f7d2c30bf26e191917939df39. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDHM1506854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442d06884c36c99974088677f222d54c7e6c4b518f3c216d91bcc0fafd4b857d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USDHM1506855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7653180378b7ca8167b75a10d28707b44fa5a350c9178a5c3a35e822cccf12b0. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM7281676058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c94718a062d839e99d49185851519348a1fc5ea7a6e13e8520e054090b06f08. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM7281676059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde591ee82f0e64fdad6548e6b88b1299dfe753356f2baabce14cdef360b91c2f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM7281676060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c0fb2615d7d215c2b023a936bcc20e2838942b63508e9454ea9b39157871bd. 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/QM7281676061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959bbeb2af8811b1fb02f623e5ca13a51a5b20cbf7c9ee795abef4c5931a2521. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7281676063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7653180378b7ca8167b75a10d28707b44fa5a350c9178a5c3a35e822cccf12b0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM7281676058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c94718a062d839e99d49185851519348a1fc5ea7a6e13e8520e054090b06f08. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QM7281676059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959bbeb2af8811b1fb02f623e5ca13a51a5b20cbf7c9ee795abef4c5931a2521. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM7281676063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afb87bb1df053e0d71991e6a368378f289a7552156d93a8a535e7e1dec05549. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZES82137140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93456b43f3c59bf20d2bb9ec48a9ab5bb3d70a2d32266cf6a666e28465045326. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USHM81882750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc928f601780529ec681ce3ffbdaaa1c686d1b58fb11167569e613747a3bbaa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81882751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f4d12420bf56b1fa3776f154e4501d652beac0785e8ebaac5f5b810a21e9ae. 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/USHM81882757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1acdb5a6c4b964ef39413b5bd78085ae1eed1bb35272789ef398cfe9105753. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42037411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1acdb5a6c4b964ef39413b5bd78085ae1eed1bb35272789ef398cfe9105753. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ42037411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06a8f6735c6e066f37cb8511b84f70276404c01dce8c7a94163efe6ac02324a. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZES92012597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0916862938c49115289fb41a5f0cecca1d0baa78ed8bee09c9ab6eb75e1b8997. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES92012598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e1ae01ab0754ea7e68fb2b74853e1e8c3032eb8416b42b58581a8a01bbfbd0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES92012600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d0599e95c34e9e9db86ec33d0150da4f6bfc57267536c78e903b0481233687. 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/QZES92012601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1ed903f4b065d19120bd660948afcba1f52a0dcffe49101a8eaa42425700c. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/ES71G2229772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae7638cf9aebdb13b6735e5e7887f95c6b080fceb04505d70da67a0b7c721c7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEXW92300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eff7471eec4c4d79fabcc959e74d6818f94073dfc22d2a8462086d9d75b3aa3. 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/QZTAU2110395.