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 0x94470dcf88cc6e12dd8e89b6e0a8f0b11d3f3d57b7db2a1927fa1a33037a9500. 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/88915052-7a29-4c6d-8a19-c2a632a873ee.json and https://artists.proofprofile.net/proofs/artist/88915052-7a29-4c6d-8a19-c2a632a873ee.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 0x2746d81bf646aef495d7a9aad1846627f638d04959b71b3b402260068d2db997. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USA2P0717812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29febb0ef2c99f95d746842ffa6bcc4fd403fd6771580769cb89787c3b8f8881. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P0717813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69effbda180161443641d0322dd2eb92344a8c3d0fb6d2fc547c44e184db1d00. 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/USA2P0717814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac9203cb07ca8d4c26ef911d8f7a3b483515a8c8ef259caab57b363a87aedb7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2P0717815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46871108ddfadc538f6476a4a16c341d9678196dacea05554a68b44d68306ea8. 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/USA2P0717816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbe6adffd2fbdfdd945b627cfa612a7953bea19fd57940a23a5a72ab19139e3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P0717817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767573cad6413ad7cb4e67a710ef8047aa8bcb7d609b87be210a015f66700872. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USA2P0717818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733bbdd098dcde90f77d9e483146464adf6f37db7e13d213eb1a669185be9e60. 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/USA2P0717819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed198afaf8e442bb74efc6861ea3dd570235bfc594ebcd978f4e159a344a7b4f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P0717820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffab0fd65f3408c11e93d689cbfd74f9a1939cd38a8f405abf11ac5377b4080. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA2P0717821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7984ca86a384e4f81df4210a52bd002a054329f7d2f451b839a43c6f7e093ab1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USA2P0717822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5853bbb763614358c96859e03d38ebd0d74ae003a9f79de5410b9c7cec45f358. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA2P0717823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7856726a498995f8608d5987a42754c17e66b90a9a49e6b59dfe90eb2175fbb9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USA2P0717824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecc6d993659a1c09a8c93defa5a208a1168e672979a5a165ebb4c34cad9468f. 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/USA2P0717825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012bdcfccb145b3a0c394553096818f5c3df495dad33fc64caca25271ea878d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P0717826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ce857b91a4b7e53eb50e359ab7d491ba042e50a63fa646852f023e5869303d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA2P0717827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9df1607d4ac1238f63e874367e9745c14386b4fb344b5b0379903eaca5035f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P0717828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdcfe62340fc1a0e96b6b61eadd52d28a5d0d17e4717afe286997107e08a1b4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P0717829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5b0b2ea193f1cc5bdfcac3ac11bd37f6e553f725a3597e237b32cb132369f4. 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/USUYG1173777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5151eeb84346aa07d1ab8ee5f2791e59af0fb0f9a0c2d21fd1493908c67b304e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USUYG1173769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e383e98fa694bf97fa88a6064155d8014413feb09b4e898389bd169552ff1a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDYP1100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf91ce720c46c62fd73c866600a3b876d8b3b4ac6b706b6b432ad7b327d4c74. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USA2P0716286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44159b026d1b83dfb29c4d414d13fa5db0ead3ffdfe182cc83dfe3bf675f472f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P0716288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada800a554d9025aa87822175ced92937e1d0fd6559ab9e378ff4a7005b05485. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USA2P0716289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d620982f815f3b161ebdfd6efc61c852f587f4be28e9de06115a33464effe10. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USA2P0716292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35e7d0fb45324c858979374c35fd78d9498146bd18cc1ddf9a412d04f6278ba. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USA2P0716295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c9e445ccdd1b478d87411a09cc4f1f0f79d28c40bd91c32e55e7d0a799f3e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P0716301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dea1d13660c8d38f3e9a297b778a559e52857fb3803227a4c25b0c8d165372. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USDYP0610209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33db86c2188aadd1d29b2b486e4646915b5ccb1cdb04f01d71aed013636298e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USDYP0810817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e52e0f9d5284cc1d08926edee3225e45a9e98cb4564c842e71c8ca2403ee83d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USDYP0810823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9703eac243bcd1acb8a74e6f7c7e49703f66af434b1e33099e9429f498aee9c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDYP0810835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b7e8f8794e9395d396d10825460dee5f0e3298102e0d1ea4a75d27c847ad24. 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/USDYP0810838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8926f38a6f3054fd6593ff1d3805971bf9246b61f394b84f86bea0cc48681773. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USDYP0810845.