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 0x6ed37530e991ac4d8e802671ff56239010b629b9defcc602e35f3c9101a26ccc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f41e879b-020c-4e55-bc74-fb49c80cf550.json and https://artists.proofprofile.net/proofs/artist/f41e879b-020c-4e55-bc74-fb49c80cf550.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 0xe10476a736b4d60e08aa803254cfe173d6366d45e019e9db52cd8f96bdb842c0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB82349504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78814262de95bcc7cf7d0ee14dd31ce521dc0da5421d6bea7565690d6cf1d55. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:24:41Z), 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/QZTB82349507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d26d4bc0fe0633ec5f04a9834a152bc0d556759255520ec70c5bfe49138f9d. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:07:21Z), 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/QZTB82349508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efbd89fab9f3984832317dde518d9fd8a83d2ede706c97d6a1c727c70bdf84f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:41:45Z), 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/QZTB82349509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6428faddfa69f45cd15b696ee587469aecce3205f64ac32871660c1e9503b610. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB82349510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d151b40589099342cd5c668dc7abdcedd27055067e16a6aee2762bd128dced. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:22:25Z), 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/QZTB82349512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d6327ed593906d8e1aa583c50b372a46d030fb14e148d016800662e66c46ae. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB82346652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dce8fc32d9e79755a014933ba6836d9c7221a48db48235a1b5c8dfc447d864. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB82346653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672e14771d3e2a9368aa56028757e560e1f43b107cfafd165dfb5883ecbe3350. 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/QZTB82346654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4db2c043526dbf32c7a9fbe9bacaaff552f2d5df94eb2488be8b8dfca702810. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:15:24Z), 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/QZTB82346655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05eb82453a3549fde559f5a4cee17674b933d4e66052891092950d1a153b444. 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/QZTB82346656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46ce3e67e66da0f4a0919d0ef9d3f47d4017d79dba87dfe390c4d2bf70ac818. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB82346657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc497ddf4275b721293c3124c2a1f4f95e34cc4d8044ffa5d30b8f712d496938d. 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/QZTB82346658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e416a16ff0443f1196788a285594cce58a9bb67d64c30aa8516269b4fb382. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTB82346659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd48c5b3a94e0179a016314dfdab2f1ff5df1d4b96ab5a9cc777d01c3079d7f2. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZTB82346660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b2fb65bf470def12cb3cb2d9237786b31c9c22da859005d6d86e2a1813d401. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:07:27Z), 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/QZTB82346661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f72adea5e55f9c52c8ab44258a60e2f07b4e9631a6cd8f6257a4f3dcb5aceee. 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/QZTB82346662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee48a869f122cf43e152204373ed996b85a71191c986186afd790893ac16e43. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB82346663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441149a98ba708b91ace71845901988d06d75c63cd0ab79431771d554ad109c9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:56Z), 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/QZTBC2391592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb371699647d0f707c4a2e45e87d2f9694be1c988dbf6088bbd5b01bf2194b422. 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/QZHNC2506645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4461b2e61f5c4c3e85e44b4d9bfe2ef5f2f879f085a41b1afe2b695a20e9f1. 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/QZHNC2506650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8e94cd6c9c9d1aa6c11edac60735afc7bec57704de399134f49696685e15f8. 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/QZHNC2506653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fde543c8d16d72840d2f6de543239f79cb24aa2ca1688775d99ecf35875585. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:58:10Z), 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/QZHNC2506654.