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 0xe6f7d7bae06b408f13d6854b981f51d5e1db8fda72b56c5a7771b2f7de826e35. 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/9fa112c1-3599-4c64-8424-0656b7cc53ff.json and https://artists.proofprofile.net/proofs/artist/9fa112c1-3599-4c64-8424-0656b7cc53ff.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 0xa289cd616c522d850b2698ff8ed0541142c7ba3f8835c9b124b52f79010a0faa. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:56Z), 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/TCAAX1168896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf230e8de195186b5061afc693c31c104e4d3ee178704f1548cd1792d0e2a9d2d. 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/TCAAX1168877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1da348ffdb900a9bf9ab51c57b44bb4d062d9cd09e7440edff975a5301b56d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCABR1303486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4521c4d893a2fee36b7cd17755cfee355018a011163b32e23aa87380750c1c26. 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/TCABR1303490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3d2eb95bbdba2f616cd6aa551f6ba6d76038c4ff7edd5e74082751f3874071. 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/TCABR1303494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54590e04584b9cc76f579460b28e4c358a1abf2c4992d25e52c416f3d6dde29e. 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/TCABR1303496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcc9aa7f9a1fad5da9ee0269ade8296929b7cc76dd1481ab2c5f98f33ba19f3. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:17Z), 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/TCABR1303498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb60a59250d3bd7b996cd6fbc0bf9794407bd0e792304aede8697fa5d5785ea. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCABW1419958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fab81f9a07bd05e7b3a686e277387ee49948d2a68ee8bbca9801bdfbfd7f865. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCABW1419959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112c4afdad8d11d605e774927500416b95f82f04b30b3d7cbd4ca93a94c69d41. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCABW1419981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c152bc354911415085b19f631994bbb3f09726dede7ce179636645a4e192cb. 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/TCACT1658891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9899e83d16b3983a67caeb556c9ade2232fd5f89344465310059cadaf8c095. 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/TCACX1779065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988ea5beed48347ef78b3503ca6bb73fb3379e7adda64578d0163549a9cd5482. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:40Z), 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/TCACG1509115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5839ec9a257ef3698f8e3f9031342c167add7f7806776a3172d582898f8c64a. 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/TCACZ1742908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1122c545d2598534b21091a001fe2def6a3512a830051aeb9b948fbb09039. 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/TCACK1513279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c2a4a8989b46fbac1d2bb63bcbd61ed8f26bf2e6d61e01afd1958e8c58363a. 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/TCADT1857009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9582a8d380da78ccf601a1124f04a3645021e920b41af730d474218b0b8a9365. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:18Z), 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/TCAEF1920053.
Evolve (2020 Honor of Kings World Champion Cup)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea91deca25274d53fcc21ce390b0c141dd7568a7c1d1dd3bb3ca196bca365073. 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/TCAET2089122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123470c71b8ed6385b40407f8a116abec6dabe97534664de1316c8500a2c6799. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFG2005429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0827c941e8f7460bedd3694e0c88ba44d59aabad555d9e9df15d197b54c51e. 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/TCAER2092344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac0b29e4a7bba53d6d5c072c3e7df932b2a31db4b86f4908f73316b48438c1d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:05Z), 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/TCADY1860975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162de4a80263de853d9c36ded29f401a1f7c15a1dbd7b457d74e02c7164ee33. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAEQ2091553.
Long Live Chainsaw (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4650dc414cd5cbb2952d116f623f0dd96a15e22ed92dda5e1343e66c75755941. 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/TCABR1374512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c098a2ff8acce27120fc328df6594f7fb2629e8513ecc55aea4949bac7ae54. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWD11156375.