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 0x558059651f32a73510673288796b3d2c4a542724843150538fbb0a079bdf7755. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2352eae0-5ad5-4763-b122-3310e7c18c04.json and https://artists.proofprofile.net/proofs/artist/2352eae0-5ad5-4763-b122-3310e7c18c04.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 0xfc027aca8a9ad7b5c4b85f75bfdcade34d63965589cff25013598aa4a13ba050. 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/USJ3V1339074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ae436938185738f9f9a6641a416817a61ca3868181cb8ca3ba82aea8d63af4. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USJ3V1339075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d7acb5af3133f595f6e544ef24758568bdb2e27cd1a1da4ff6ba878a8ad388. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USJ3V1339076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c6d370c7a9c1856c7dd4bebec8db0ce604665dd196eb81e76eef3e2cd6e15. 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/USJ3V1339078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ba93f38c875ac5487231558e8160beb8dcc6014a6469517de99aecd5b80622. 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/USJ3V1339083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc32c3cf23a7ddd11d8502de56b41f2e33f38e362435ba69e5774da2adc24713. 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/USJ3V2016372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd112ec9cac7e0f5b93f8616e025f14be009d6cf7c971a1bc5b90b1533ce0fad5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAENV2083360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc935d0bd90bea941ca72ce9524ad574c96f6e094dc4410bd643bc42c930d45. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CAENV2083355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535787defd23bf2e5c13d6f5f7c5db58fa8a95a105cd3ce9dce7caa4ae6f8f80. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/CAENV2083385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc196181f68c49ed52d8ecceaaf775c5615eb518320d8b01eabd9e86dd09c9105. 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/QZFZ32261256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ebc47ef6e99b04c8e19ba2e14f62f7c8b89117fae0f40987cc052995700fa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:36Z), 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/QZFZ42570037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0e6347d3203c30e6ec8f2801106e4fcd21482e6d324859f155e3f6bc019d69. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAX2313205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45364f5575aae4f1eeac705881d152480646af29cdca071ffe2f6c2ef991c7e. 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/QZTAX2313206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf617dc4e3c54d1a3bb50e57eb0a689df2125639e5d2e297473def1a3488f0913. 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/QZTAX2313207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad320604125785eb93306bfe295a6e585946aa6cfe3e2cad327f45580997244. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:40Z), 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/QZTAX2313208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbfb926e32a5537b9f64810c4ff24508f9f9ab847077c91413061154ab27b36. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTAX2313212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa75411a22dc1b67fecb98b22f1a272e91141cfeb037ac88e0029c89f335294. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTAX2313214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d3e2054c4bfd252e9e55d1b80c51f4b97890920a781d698beff70e7495f51b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:30Z), 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/QZFYX2529565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1583de23043235c3b30a318901d202521a18cf93a2c80f8b5cd9078b7109b96. 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/QZTAU2592066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc572d3a34533afdddf84b16159d45f57c1bcab848de1252fde547566030e81c8. 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/QZES92510872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54ab6835f54aea2b76bbd67b3ae180802d0605afa39f33bd4cedac0fa6d4cf2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWX2508655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb18592aeeed59f48417f1fa6cb79f5896775f2d4fdcac069a11b39583d932a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWX2508657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eae96e11b03e58161b6cec0307c05787863f477ecae41cf6ca63834f35dc3d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWX2508663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df77eb67408689541d8e8328ad22ca0839ec58bab3541ce13b765bc92a73b64. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZHN72301517.
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 0xe65b3d236d2b7f5894b4d6682737f112c9dd036a4bb13a22594ba3eade1bf922. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWX2508654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6a8231adb8902f40a6ca146b15277b694bce9cbfe2aab87dedd0b2591fa4de. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNWX2508656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a4e3dc0b1739b704bc5e8ae904991244c2141b4c9ce82e3396df064b2b68cd. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTAZ2543973.