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 0x6719b1d5f25c6b49176128d1ce24f15b212bf829e77650dcaee1c0f7cee6e94f. 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/50a9a854-438e-4a0a-a142-6dbd9e2663a9.json and https://artists.proofprofile.net/proofs/artist/50a9a854-438e-4a0a-a142-6dbd9e2663a9.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 0x324c53f183885b1fb9ffac89816f5946e63aa6388df24dd0c4546ef4d3217425. 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/QZRP42495242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b4d27c030b09521598f615d572d63a3a44096a45fd35475cd9f6cc04667b29. 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/QZRP42495243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc413fd21139425b0957136fadaa90e51cc068a52269f6371c0f93c491f8a7945. 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/QZRP42495244.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593bb3ae44ed46741a863bdb4b0e8e5b8889a09cacae27925fa3a11fae01bb26. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP42495245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53f9d1c14c95413b411bfe742ebaffe0c6e1e7dfdaf4f7c7110bb998b06e7ab. 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/QZRP42495246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab59c56bf059de5a0bde36d2db50d00f8fedba306ac2f092c6c6939c502f5b03. 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/QZRP42495247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe401a7605adfd0355d6403bc0045bf85807260951a3450fe36f287f87dc3366b. 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/QZRP42495248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3025105c37f9df11e411e4ccf4da51eca7669f9612716aceed9bc90ea9b9d97. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWS2374137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9795a4e95d5f64b0866fdd96202f5658ae89b5fa6689bab567e4c33950de5e. 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/QZNWS2374138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad14e69fd6cbac4affc80d60bc5fb19aa84c826c10d4e2bb06dc9313e8cf86b. 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/QZNWS2374139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a3acbcfe734a876624ed98f90edd795c8a73675ee4541f0ad8b988a1f63e2. 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/QZNWS2374140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c21013db0b39b5249a8af54753f45aa8f5dd6e5461566f60471458c15e923c. 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/QZNWS2374141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ab28e3f916026d873d7d8ae94b6ddbdc57822feb5d76553fddb2b35f7c8aac. 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/QZNWS2374142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf00782ed1bbe3c28fab14f6fe9ec2eec099f89a44d1666fc143e0821c6d499f. 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/QZNWS2374143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea0b4b3705b1cec8a69d4afaa2bcf075fc54aff9276589a248febf181579525. 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/QZNWS2374144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc241ef3d9ca2e412110f470d2cb33606d316a3e6dc8880aa18f55960ef03e95c. 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/QZNWS2374145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d826cbc7daf310cd7ca4a089593342659eca1fc22188d7807ee3e0c7ff3d016. 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/QZNWS2374146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb159d145968cb7bbf849f5cc5ff9df64d82ff5ee9c3d5a5228f26a228175c12. 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/QZES52093658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484709d1310314d72c5c66be04e37be3f9e1e7de4b85282477f7d9b8effee182. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES52093659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378ab8c1f6ba90c591ae8b096a602a4278ad7a3186163a63d80e77527172cf67. 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/QZES52093660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69863d42aa02a6b2cb1cfe01c13cc69802c0ee85498eea33d7b027b242dfda69. 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/QZES52093661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231870bc931a97510f3a73a899937bf4412ad5c3a7b2a0c3ccba15d02f91ee00. 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/QZES52093662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1130f64d4f04be9e3227fa11aa3ece441f67efdd3ecff3a3f0fcaceeceff4d94. 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/QZES52093663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf63dfddc5e891a1b064c88d5890df5f9998103b22e6fcc8415fd9a909bffe2a. 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/QZES52093664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bdbcffd4df9394963aca14b5fb4c46cb20c45ff7ebe6c1efd9cab06e9e2daa. 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/QZES52093665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3c067eb1db3e9174785aaccd393e408fd8d49111ee1ac049c07cb26936f3aa. 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/US7VG2582081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6730596c960ff5719d04fc87e691f50ba44c32937f0950923aa0d102a8093317. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA52442387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f8218de69df27259b44ff5b41cca3d5ea55c212d6f6ac2654a6622f1cd807e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTAS2493518.