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 0xcbb3fa4fff157228eaef528c53d1d749f6ddab778c3e07fdcae924b122a47300. 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/3b8e2a7f-0fc8-4a2c-9982-8f27c1ec012d.json and https://artists.proofprofile.net/proofs/artist/3b8e2a7f-0fc8-4a2c-9982-8f27c1ec012d.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 0xf9850b6f1334d0eddbb4fdce13e2bde65c488a2c3b95b0f18e48987a75e34b1b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USCGH1357541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e460751d45931ffd61ba56783c7f87f49a5730be4f8d23d2ad3c064ac7a089. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USCGH1357543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f8266f8daf84b0e2a0e60fb6264db00721425ea552d25071e82465d6d1c149. 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/USCGH1357545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa9fe2cf27590e751e0dbaf98d208bbacb9ba83f356d5a6ccd58061fc490cb5. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/USCGH1357546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ee0f5a80a9b90ec7002b4670d7c71de2381496cb20974af1c70df2f3689f9a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USCGH1357547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9be177fee42b48270bd0edd03addc136e090cd2819dafd6728a2891db30c70. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/USCGH1357548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad8e99b80c6acbab5b0d96eb0eb8f414cfa4b48d509058063c1fc7f87c011f8. 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/USCGH1357549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb77d0c8e49292a31fe8ae25c0c2c27863abe621193d4ef9c13278602e63bebf. 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/USCGJ1403975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ee3ea9712f6d94d9fa5866bd8c618db4d403a68c47b2e65144d930b5939804. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USCGJ1403976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506e97f4339bf7da33c9dcbafa02ab2bb7b4253eb901873490360ba65baff285. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USCGJ1296909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2cf84421c82c2f9ad3a6a660beb7d2e1a280452ca9922c5af227656181de71. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USCGJ1296911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4822de1ecfcd1fd8c6e4e9337fa93dd7e352c2c2f46c3fde8ba579e83f8d0f90. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USCGJ1296912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f51933de4846debe4312fcb7509c4df25b0fdae6b0b914cdb99e62807d164b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USCGJ1296913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34df9552dc3b8efed84406018dc84613cf4ad95faf90932a0b4d7be4f6593a1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USTC40812161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d65eb30ec0a15769844e009b92bef6775c105cbb7eb0a7c6b2fb15f302898d2. 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/USTC40812197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39cccd370f0e90336fbda5cb766a1693dd54f7fca28f69d1e9ed0a4682f536f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USTC40812761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc466f97b19336ac83b302a7785f61e4cebab0a56c9bd1133b92c5defed08919a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USTC40812763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf94676ea33d6dd1f8d0cf7cdc48271ed8a1a1a9f2ae54ef94dd15fbb91aa90. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USTC40812765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d089b86e948ee1ec6a3b0eb22f8d0612dcf4fbac18f75f14dac8eec8a4949b4. 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/USTC40812768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc08665dbdb95c87e2af9b06fe365074cd84e4a3f61664260c2332989b6d84ed. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCABB1140526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2228391809f7bf54f61414c4cbfcdb74d3187434bac97d49f2cbf1119d5fa208. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCABB1140528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348eb5693eff705ad4688743e2a8c58cde5c57281cd6d0eb4bc777a8c192707c. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCABB1140530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c47c33e41587b6a7e497fd8c7d7eb857cabe911ab9514fcbad393bb899e91c5. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCABB1140533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd009a61a77b5dd7d2522421e1cc66db3393d8e8a60da6f6a8a13a996398e87c9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USCGJ1507061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35362d5639504c6a89265cb7d80d064c76e4a1e7ab4853d9705c40726f9cb0d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USHM81536693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0942481f6cec8a8a1c8e7f858337fb207e0f042836066a048fd9604b2ec3e62. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USHM81536695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14da7378dcd34d22d917aec7d152aaba2026a8d5489973c49b9b2a49d66f500. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAER2026319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06bf70415afd28fa4a30758a66360899d212bc8c24f3b0642541411c10785c9. 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/TCAER2026320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc7b9da97b65c42705814ad1e578ba22b4988ae0265c2aaa64827d83a732d78. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/TCAER2026329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82de6a6a11f3f496051081f4b0dbf06cce867a41955a9721c842f3a330448fd0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAER2026341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db2a432f5d4f5de5574c796226abd88658f1ff308e67c83d8b26319e9633232. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAFT2182790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc7b9da97b65c42705814ad1e578ba22b4988ae0265c2aaa64827d83a732d78. 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/TCAER2026329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db2a432f5d4f5de5574c796226abd88658f1ff308e67c83d8b26319e9633232. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAFT2182790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca18be78ec8f3d33c12196da468c10bb5f368c901e9874c9e89f426113a7f52. 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/TCAER2026325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4850fd37d46b17c43d69381b37c08e181cbb38c141d41aa7f5baa079f89745c6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAHL2311814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14da7378dcd34d22d917aec7d152aaba2026a8d5489973c49b9b2a49d66f500. 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/TCAER2026319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ac0f7aee0e3a1d24c1cdba15ef2db90f07135faf3848bea393960d60f215d2. 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/TCAHW2439480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06bf70415afd28fa4a30758a66360899d212bc8c24f3b0642541411c10785c9. 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/TCAER2026320.