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 0xcfd219bb04612705698f24ea3c4a26159be5daf84a52c270bd089526670c33dc. 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/e175f395-6879-40f5-913c-eb6a34f62de1.json and https://artists.proofprofile.net/proofs/artist/e175f395-6879-40f5-913c-eb6a34f62de1.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 0xb75bbf219ff55013e70737a482a4f3ebdc64b0278a431e8253342c3465ade2bd. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/HUMAG2001384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864968b8f1627b3cb71b96ac33db23ef1ead4e9b6d8d20dee6af6ddd2cf6f688. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/HUMAG2001385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a29d4179eac0d586e105a8b063699042688fe6d89502010440487070e47800. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUMAG2001386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa931db694e816c1023a37395fb02083ce9f99718f67f3b0b10f3a10b34f0d02. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUMAG2001387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b7ae7b4962e08e0b4499a3f68d8d8a7ee571fb3a3ae116c49772aac0c262f. 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/HUMAG2001388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb69d24e6a17dc2229da3ce174a8d57ae81442fcb95217128395a06b7fb4016b. 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/HUMAG2001389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd709ad731aba38ba218c8d71c900f66edccb5bcf7726500f54384c777ae8e4ed. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/HUMAG2001390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10ebc3979eef2b49e27406da59462bf69190b7c5c17bfd0585d5a494e65b8d2. 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/HUMAG2001391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a53a15ef434c4e22bb20bff5820d6cd64fa963607d80bbed726567baee97cf. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/HUMAG2001392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5d61ac52bbdec2ae36d2478d7d54db637ac43674f882a62328970bda03a67f. 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/HUMAG2001393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77865bac6dbc0eb27710b5bb1a1b08181e59a905e6934ef81d2c278dabb141c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/HUMAG2001394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0561a83de238eb5e30926c50a251e71a1f821d9748a3046084b2d01263db3c8d. 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/HUMAG2001395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf1d2e3e9be4c8c7038fb5fe7349d997fab525ae3b3315ad57b1a4f2a4d1f28. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/HUMAG2001396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3ca78a44e68c4344a50fea7be5e5f4c7ccaf27ec803b77ff3617604cefad90. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HUMAG2001398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052472a278c956890fb9e0de273d760939ba24388171be0d50e4d040acb346dd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/HUMAG9700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5012b8838cf82bb91b6c4cc0ccb4f7e756dab9f0696e7fd4aed55ea99047d4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HUMAG2001422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a683899554eef75656f402bd5ca88c4c096071f67868eeed45e0c187779de5. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/HUMAG9400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a042c664e54776c02cd945f406b29d65f2ac7be63bc2100706009a7a11787d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/HUMAG9400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7126973fc4701acf199c7a03bf9df1c601ac8355b6d6750fe9cf1e21e425ffd5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/HUA251779907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed4fcc5a1327f4e66ed2bd82d4898b034ab3b0fe5f82382a5971735e2ec2487. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HUA251786102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2409b60b00cde03abdc5a0e4f1e427a0b275d828779146a94347973f5f1c692a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/HUA251786104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d76e6fd1fc0230362c60bb4f82d0908f3e3102491baba3efd1eb9f9a87f647. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/HUA251786105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9bc953c67db89c837cd199034e06fbba97b0797ecc9139ed580b186033d7f1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HUA251786106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559f62f295c1c7331ae25b2af5f7754b5a73a45383779b31005d93da74640c31. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/HUA251786108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7adde756d14c123e168b539d349429ae985c740544ca626f5fe26dfb71aa189. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/HUA251786111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b3acb0e3476f5ae2bed1d07c6cb912c88f0dab2706eafe01429ba797b407b7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/HUA251786112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecad772fa6e9679738ab37f41050c7eef55acc2af614bb9dbdf747045a511ef. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/HUA253701102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8024172f97a8aa5099f1d13d6cd309d0b535de12cbbd950ef26a820f46302bf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/HUA253701112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead53a99f1530832141d948a77b4575f269ad6cc1fd5cb2bc8da2d01f3d810b8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HUA253701115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea247261276a7fd5da259989b7004e6e6231c9a667901aaa3228fd23e1653c57. 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/HUA253725801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705506268e2b263c73033f0af04d119c45bba0785e6bb9f98331d27634b4dacb. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/HUAJK1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16512b430c9474edd9b0e5f7abc9703749a6423bfbb0df40882997ca26d3fbe5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HUC141300112.