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 0x3f4941a3c92d7401b407e46c1c6626169753cd0dd3bfb6dd5554f79c68f05c92. 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/83fb29d7-dbc9-466e-a0d3-da195a04a9ff.json and https://artists.proofprofile.net/proofs/artist/83fb29d7-dbc9-466e-a0d3-da195a04a9ff.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 0xde385067f4dc4788ef79930f05951d96a10eb3de8903c2da178fdd3701b03907. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:33:35Z), 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/USTC90986473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915fbde288d6b61832fa52f2aa2b71dd2cfbc85f6260591bba2f19085f94a3a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USTC90986492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa00ba951eb3d0af686438baea52ec67fae18532c96e0a4ada155a85082985a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USTC90986493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3246cab395ffc69301848f7499b1768e71a2ec25e6952822f34a92a8f70bce. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USTC90986495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8ef7f9d918e0825fa4140db14391d66d00465a4ae891ad9eb86a28826f1e58. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USTC90986496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1404b21e60d4c6fc6ce6a089c590e1c78d60764e60a9fd04b90e76f602b7167. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USTC90986497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909b116ba4ed934a26e277acc27ed117296cbbd9fa00919b6c62e7752d9ca192. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USTC90986498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394b3b85e11fc22690417d6ad970f7b63fc3d5399c0dc6c1b4cdb60cefd6d60d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USTC90986499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a873fc04fa383b7ba4007bff64c0b21552a29858b4cf3fc24e99b9d9ebcc45. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USTC90986500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de2fed355e1c2dacc99d86cf3632cd302cb1422e21dc3c722f8890b2ddebd80. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USTC90986502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b78b4b91dd0a0f5775cc3eedd4ce2816ac4ed333b88394a27aa77fdaa82e6e0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USTC90986503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00821e34b496c6b5f5f3ac17d4fab89b9096f037932ca11e74579b15db79cc6d. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:59:21Z), 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/USTC90986504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a2f9ff2d9774af9b20719741b671ff0bfd1d967136789d5f903a628e02a1b4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USTC90991559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd85426a92a47b348b42ecd3c76378fb508c7a5d5072f09ff7a1505a9e815d71. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USTC90991562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc0d2e39d1a8811271b56a83973728d886925913288dccc7f5077ec64d1129f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USTC90991573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0a676f8edb080f1e7c67864f104b0bb72617c149a44a75c34d7224785bd1af. 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/USTC90991576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2b1a26009387b29a011a957ab56cb2114a702724b73652ddd936f7c81741e0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USTC90991580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0794c5b4a73bcd7761e4f8c05d65ce7dbb285e0d9a7d5626ccb5e99e0ad2796b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USTC90991689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44dcb0d40bffbf289fdf1d02c817368ed48a6283b7df97dbaea6243e50a871c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USTC90991690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a9f76266dd05f2a5feace2ca73e651778d333159ea5853c63d36f4b4570db. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USTC90991691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc93e0043444fd37bd6f5afdd0683367b080754e348f28820571b750642d4336. 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/USTC90991693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1f6ef974453759756b0e1ec2f23f19e8d19ef5eb3d8069eca8c419875e997d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USTC90991695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85848285ff1b46601aa05b6af31719403f8e47ae41a13ac2b75c2f3b5accfe25. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USTC90991696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a862466d0e237d77cbf6887b209be957058c3946174c8f98ef8385c1380806. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USTC90991698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584c78eeb4fcfed94a394b7de8472b1925ce7ad42f1de2caea0ee055a47265a4. 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/USTC90991699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bc390b032c6a5ec755b52d0475a6d708824b3ffa94fe8f69589ee7c3be7f2f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:55Z), 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/USTC90991700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa845df929df8d49437ea4b4d0184bc1bd5427c76a86bc289e90da2aba905d277. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USTC90991702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbf408ec428155780b6f246edd371a5b3252117dc9361dece0eaebfce0e4d9a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USTC90991703.