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 0xda51eabd61bcc583016c1baaea047886426e2e2241f615aad383fbdb6e1dd053. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42f2b512-7d22-45a0-8577-6cadf9151725.json and https://artists.proofprofile.net/proofs/artist/42f2b512-7d22-45a0-8577-6cadf9151725.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 0xaa7a922ebd8a35c67487a0ec13d2951f13d6bebb856079d666db8564b4474ea1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TZA1X2200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad5ea31a36b98c889a30b15c7f26a97ba94f5e725be7bea1ad6ff3489344597. 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/TZA1X2200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d747ddba6fdcd9be0cdbde382bc99760587942d0744388905db31aa8eff8c4. 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/TZA1X2200616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd120db3caca7c416ad55da2a3375af70927700d49841f6c4d9e8d70b17928bc. 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/TZA1X2200617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf109831dd9d451096bf3ccae1fe5551251b4b5cc2a7818ebf684b21b3cc87bb2. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TZA1X2200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d20f02950b1f2ae4c78c06eaad69af82ee3a2725b56c17864d66f5ee0d2bd. 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/TZA1X2200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66954e6118f26ad84afd878f8d3bf3eb781de04dc5fa3406da3926f686c4885. 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/TZA1X2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c3b0a593841131fa837985624580fd4781a87c3005a7e78e95b7cbf6e7f5b6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TZA1X2200623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4625d363afa6c5112a6ac29e924017fe98445d4d2dc7f6be64b444e66adc0a47. 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/TZA1X2200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aa54331a73e268bbed335c57fa9c555f7172e527b5e771aef0d91682935c1c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TZA1X2200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa763c16facf96c7333701e9077fc8d7af00b7f2c64ab8de43982a1cba2321b02. 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/TZA1X2200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b18cc7472ad94ed35e8f5c85a9b9868efef81871b0ade73347b75bde4aed5c. 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/TZA1X2200628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d607a9a17d95f08601b6a02d82ac010314bb1b21b8b4441b983f8581f8bb69f. 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/TZA1X2200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd73917ee2eda210d79f91a55e56d6cb45e321c22d17fa6917605fe7bad0901b. 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/TZA1X2200631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e6e58b0cab894e32349fea4c047e26b651bec3585a8a1e0e9dc7338c365418. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TZA1X2200633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54444133a6d63987d177704df91dc630ed2bb15fa9ee687f959966a7064b3d47. 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/TZA1X2200725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bcb20e323afaf5a62fa65ddcb63139d53270ff4602e9faf28123e32eb7e213. 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/TZA1X2200727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388e8bac08f9b8f0ef4829c7e16977d137058afdb0d8543c9285179a337c6443. 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/TZA1X2200728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115234d3fca0f3b7e1386408703d1aa7e7c7f7b2c48144bf0ea348e760e96e21. 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/TZA1X2200740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e64d36b428ded9da632c1a5ea659cfb0c06b0da1e9e9b63e56790c333e8ce9. 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/TZA1X2200741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa607eae18547486180667ed99e9c9f943b71eb2495db24aba6ac800bde005a6e. 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/TZA1X2200723.
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 0x5baf4c29fc3d4a9c337f71f2fb5b438ec6f6f6ba0dd4d84a5744be6a17ebc499. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TZA1X2200724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740f40d470a8d176ceec6397da6011a3500f73ed9f9f153c784629d4f61cc90d. 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/TZA1X2200726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d5875c767ae1d65ec1526508c1a865dabe8f8d5ea7dfc268f3b704a01c145a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TZA1X2200738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e5261f8519e991481b92899dca77104c20b21c250d3ae69be7fdd893591afe. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA0M2375488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60061565a6a0138846570f713f425571b0d00d841fc2243e6b021c5e7ac3b3. 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/TZA1X2200646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1255dcbd1106205c0e6fecac6a1acaca1a412ab421fa1cf39ac7331e895a9fba. 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/TZA1X2200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6fe3e12ebd88e0ea95a4a2a94133efd1b3124d16fa8bc12ca6a7a4de72315d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TZA1X2200653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ac370a5c8b1f6831ee42771eee2a2326d0480ae298fc5e096a694eaa8d24a4. 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/TZA1X2200654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1e2e0e794bd85bef70284aef4fff79026eb8e8d010c5381b682710c57640c5. 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/TZA1X2200655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc72eb90e2cf38595731b1f9f1662350dfb05adccb677746d1da55d23b1c10a4. 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/TZA1X2200657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1615be524f304542d939ed30f3d8d446a796210ba4f0c0fd44674bb012f3614. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TZA1X2200658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dfa0bddf744c54cd145719ae4fea8f49224e3538e76df2860a35035574bfe4. 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/TZA1X2200661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa815223bee82a19c62cfbfd46cdec055ff97382e9f42670e98774795b8e6a1d8. 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/TZA1X2200659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb231ef8b8abbc223b53a97a52ca95769d085afe4d80a56921515b8e1ff7fe25c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TZA1X2200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f5c43c34c5bec40ff296e75f80f6558559af75dfa8eb203cc6302fe55e6405. 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/TZA1X2200665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6511808e35ff5e7f1afe8a325fa5205af2b6d1155597b181fc665cb3d8f93ba7. 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/TZA1X2200777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2475fa3f86fa0e1958257dd4ca93531be7cf498c9fee63dccd248e5644f3c454. 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/TZA1X2300609.