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 0x2bb0b9878c20cad927bb10302d748a0789b34a04e7825613b5dc0c372e73fffa. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a359c52-c789-4a0a-9bc8-43a5a611667c.json and https://artists.proofprofile.net/proofs/artist/1a359c52-c789-4a0a-9bc8-43a5a611667c.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 0x781193d1f4420e50d550256fc9a8b60082fe4bb3e327c626310900c1df4590ba. 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/ITH452400514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d533801614b7f7ccc01a55cd5bcfdf436385b4f94c5018e89b15532c28d17b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITH452400517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775315a5a7116a4b8077e692b090013ceade48cc1ab42190e2b93a68b3bcd40b. 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/ITH452400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c6bf9e381b6a4386f974f36e8eee1ccb787f3722243e3fb84e938b2122ea7d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITH452400521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747e918d02051393775e62d85b46bc6b296e149e0ccccc93dc26174645d9962a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITH452400510.
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 0x67f6b2ad86b035ad568ad2c181090bfbde10d6b763abca7e720c3afa541b7286. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITH452400511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73e5cf3d75e8111326af9050dffbc936b56aa81188f0c141efa8361ec5062c3. 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/ITH452400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5c561f751e901ce0875e2ed51b8f9fc1e2cf737dca3f8e7f843fe576d97c3e. 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/ITH452400513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8c676966025906f964233d64ac6ce99506e073a2577dd96d065b5f68d5900c. 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/ITH452400515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb10545c4b8dbf0c2ab3b5dc7d81a9c3d51f81fd718d9f4971ca255dd05e82. 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/ITH452400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e20a447cf2d24a385da96ba1d998e4aacf328ba6197e0ea68d56cad19c31017. 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/ITH452400518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a403ff3c6ec93473cca196e1e9134befaa256e8eba6d51501474a62d2399e1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITH452400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c680e002fea20fbebcae508afde22ffc1d5520b2133422f58cd867b86f78c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITH452300793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074d40ebb8f3af31f390db7272807c909e7028dab413e45a267d1cc525372634. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITH452300794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4abd788e4fd50866020af6febe069fd333c6a3f55fa13b0b752d556f2ad73. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITH452300681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cabfbee0e14f6a42700a03a6f561bc304ef7664011348363cc27976fb13288. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITH452300682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5747e07c089ad24e5c79aee45a8be0f0bc099ab84dd786c1b21fb18c7861b282. 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/ITH452300684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0287644c8c9e78f7044996cf3b17ca05b9d3c2e9b53babf891639d4440635b. 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/ITH452300686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51146ffcd8a265c15c330e130ba06133db28e282062f1b90929a3a0131720c52. 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/ITH452300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58756b34b6fd8014681dece3d3ca3243a672304241f9211d332322d198d6cf15. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/ITH452300689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7914e6b152e3937b377094bcd98acebf7646c0b92de6d2c3c0f9a63396660cca. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ITH452300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafccc21ddb381d98a48dc3e8ec84ecf43e0482051bd037c96db37177cecff83c. 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/ITH452300691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfb4ed237c71979b2ebf04342e786d4e319ec76b718fc50dc8f4a670603a5fd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITH452300680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88faa8ce0bd66f4b0309d1fd5a30c86f0a2824d44afe350fbbef148fc40e5cc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ITH452300683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d66c24f42e732a9acd7b8a310f97c46594c90943017f9420db885f999f3083. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ITH452300685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de9deca1474a81aa41748ebc013393eeca300a728552afc73e1491a2facd3ec. 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/IT10P2100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8503fdf70939b2468a3abc203bdb4bdbc39cae6f97aaf8421c8169982f498d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/IT10P2100106.