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 0x066c35d76d97c8983fb6ccfdb5fb3877351dbd2db9b6057aab4ab49a9ba21e30. 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/aad40e69-4d8c-4eac-a88b-49d6ff2284e2.json and https://artists.proofprofile.net/proofs/artist/aad40e69-4d8c-4eac-a88b-49d6ff2284e2.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 0x279759827cdb2b3b80bec3ff0aaa24046050f65552cadac0ce5c1aac2bb07d06. 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/USA2P1502936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce9bf66ea752ef2dac88e013ebfd592b8ab141bceff3f88988e2b164a6a7b71. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA2P1502937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b9a91eef7e24b9339669ac7df203ca957e317d9270078f22043b7998f526e4. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USA2P1502938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aa3e22ac1d32ffebf1875f74d080ea5a3f992da67e062321b6dca9b9c83834. 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/USA2P1504318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3403c2ebe8061a7f2946a37739e3457303a40b5e627de505ef1c57f3c2cbbc52. 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/USRY21500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbffcd40fe3b94691be31eefd51b0558677c7d23a9ebb50e055aae33abec1d8. 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/USRY21500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752f9335d73b313f449eb0fc1bde5bc97b5cfeb43ded6022a5534f2872c81e16. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/USRY21500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fa9265e593cb3300b1a0b57c568024c9c6bb356804d6f1665343d37af430a4. 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/USRY21500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e28d056183eae4a068aa1fb96b2116e6e7c88d1dd7b4eaee755d46942b7e32. 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/USRY21500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66cde920f5bfa8fc65b87a98ae202bf54129a712d86a792ef314aa843bf766. 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/USRY21500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86028207a359841a1569edc200d1fea38ac315222dc1ca4b656d4363e938b4a. 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/USRY21500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7b9322ec0ac9ca2d854edd32d427d750321fc7131e7cbaf8f2b946eec092d8. 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/USA2P2511577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7b28ce13ac58ffefa7bff75eac63db6f95a859a0cde5a8500abaf4e535299e. 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/USA2P2511579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2ff0e0d54933370b6c42e4ab33fb40baea4eb9f2ba7a5d48a616a5f5e9db4b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USA2P2511581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b5bda6ea566471501d26745f0200c3d67b5b60217111be1ac4c28dd3acf648. 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/USA2P2511584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37d98bd169dccada9e949ee9a9262470fc968c16fd8d72b1f41f4482f4e491. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USRY21500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f462f95c10af9c126c8252a4b6fd22e013d32f8881787ab54ae04b46823f166. 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/USA2P1510379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2799758f8ce1dbf7c582e82f719762437a38f0d8940d0703223f1fd790372ed5. 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/USA2P1510380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fdaaaa1a40f13fb0f7f8bbd6b8dac881cfafd848c41df53d0af0f0890ac297. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/USA2P1510382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173b6b6e366783f6ac25220cd1ff8fbaab499effc2055d24486eb1425bc9418. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P1506662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a29dfc43879bafbeac75329283880f722461b29288c9e02a51d342357e3f66d. 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/USA2P1504300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6915156e2b0bb730450ffcc77776ef60c007339c159274cc1c46abca48e905. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USA2P1507259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6648820c3edf1d33485eadcd37cac96eb9bfee461e9431e9cca16818f06d909d. 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/USA2P1510121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8351f03691da138656ea6c2e4aa21d4374f41efba7c9bbf5742e72ddad7de6b9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA2P1510125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494e1f81a826d3e0816ca603c707cf1917611b93104d210fdbea49f713ff140c. 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/USA2P1510126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1155eb02564d50488d23b6cc7f1b29f85da0fa059031950604a4e8088a3e4c. 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/QZPYN2562249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7db6ea77c9191e7eb55d64206829ffbb591b9c0dd074180d29b47de0414850. 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/QZPYN2562253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075e658b82dcbca0e8b193fbbd630e2c69ef2f55ecd95066451a199cff6bfc27. 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/QZPYN2562255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa8dec1a0619c25770cc22c0a672b7aaa91a9aa116fbe81b8a5b8392580970. 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/QZPYN2565533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b33b9044e1da2e5796457472ca97d3c19a3556596115eb1b0a102c468ad0de. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZPYN2565537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fd893c57aeddb287628b9717608c080706750829421a6dd102979a635d2447. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZPYN2565539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebe485012f8a156f64caff9031e2d7aa803606e74b24e48f8f98a298a667bfd. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USRS72378001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20c58aede1edbaeab4c06e42fb80f74eab49e1fac78aa6774ab5749120c4471. 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/USA2P1502940.