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 0x3b6dd25a56b26a498b35ce72a2998e37a9e01aed330365ae24c87c7eb3f31ea2. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d20e4a0-2799-4f71-a55c-937af9f134cd.json and https://artists.proofprofile.net/proofs/artist/9d20e4a0-2799-4f71-a55c-937af9f134cd.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 0x13ae15bbe76a5a0e93e35a88de26856a1e4d41dcb3da002fcc491d36b035ca22. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QT3F32468478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2f422604baba66faf6567bde87af2cf44a41bc508d1f2ed728d10df411d328. 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/QT3F32468489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ee679aa03b14c04eb213d95249a2b090201fdd67039545788b40e89dbde445. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3F32468471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4729294541e186dee730f3d32a6f09ce93dc1d48ab3adf7523c97970af88cd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3F42435700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5bf3e8363b1bd287bc131a3d084156f24ce612b3e6623f8e8c8b4aa24d560e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:40Z), 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/QT3F42433710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db16124f5919afbadcce4df5a4b0f03ad6db1466cf0bcfe5492e354b42d9031. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYZ2587837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f3f9a67e9bcb36b3ec67f075b1e2daeaffdabf71cd3b27ac2cf991270cf43. 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/QZFYZ2585656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3ae70db9eeb7da96d682368e85eb6652777c9df899d259068dfa52896c8fca. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFZ62547111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230b5b16e87e8b59db99593e474545a893969031c38032f4c86d72960bd27825. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZFZ42593248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb3352e4e90e19a110819cff162471892a05cb089b4cbb6bb5e1043a1bea60d. 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/QZDA52502748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46ddff65a95b63dbc8f01a9b625603e87799593eaed7025d45f3061644d6a85. 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/QZDA62510691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53713b2d429dba70e4a8d4e07d0a959371733b7531e3a809e543cfca66b70161. 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/QZFZ32566179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e02931eae6866a5c43e1fe41ae3894959b43a0366ef5c68558f4a10adc936ef. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZDA62503762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae72682b77b9899061c3fe7cba62e700927d44447c0045c3f867fcd7ee99dbf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:36Z), 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/QZHN32530586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76901c02166b8977088e53f5ebb055836e4b3af7a6d9fab1706f0d288d1f8110. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:15Z), 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/QZHN62560684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef98d675373f1344029b1ade782d3350e3633fc08b5927f451045948e129787e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA72589416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ca7c3e10c50b74c1b072a48c79c02f3ef2f748c811b6ddea7892b91ec6b51d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:36:25Z), 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/QZMEQ2537449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02be81f1fec7a724ca67ae9dd53dcde09845e3df8fb88972f036ded8b7cbbf29. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWT2524354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa52b493c52fc2dee26468048b118fc2ba11153c0911efba70c909ff1a5c678e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWT2524355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98311f0c4c64b046629043c96ddb6617da4a238871589c8a60824d2105bdd20. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:36:15Z), 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/QZNWT2524356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907ed1f7c407d26451d8fab618e3e76044020f7ec6021f07dad02ba8be4cf590. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEN2512274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104263f061c082a803e777a3bd7d1b55f2d8a222e53aa057fc81e674c3188f62. 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/QZNWT2524357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a40e5716e3573e30dcd7b290395511664ca54cd89c0881b01453fb2092f17e. 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/QZNWT2524358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcac2ecf817697ec2f4c30240fd486c2f96db47dc4b56c8141620c12436a10c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:35:27Z), 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/QZNWT2524359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb779474137911a6a9827d42c1aa3f8e80baede4a412f5f05c739167bbfa03aef. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWT2524360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44be4e9eac82ee71acc187aaaec57b4035446537f743edf899bfb30345df01f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWT2524361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05f6e4899064af4c516d1dd901835f1444e539cec888d2b06c4ccf2700967ca. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNWZ2565144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd88b09f574ecc7e5e1e7ceeea373e104f7f94ebfa1dce3ba9cb1973edcb1aa. 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/QZRP52538071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb672d699b2f6d6fa7a55d7b7c356a64ba6463dd931c71aa93da3b0e55b1523b0. 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/QZTAX2586723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c3844b5653f0fd8695d35ae79a78b78340fcaf18e17445aa7beeb6d0f1b407. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFJ2537419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed9ac9901786901e41f68e64ab550ef142f2e30d25e5346212570f48a9f4cc6. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ7K2537584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fc133f4133aa49e5aae90842c8ff48d1751b75aa418fab1504b4b85a09a5e7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F92537772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355a82d95bc52874517c87907566046640ad2e60522f3a334a685a36ec6ff4d2. 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/QT6E62582330.