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 0x2ec2118c3fdb372ae0ce9d260ac17299384a565be5a31438d269e315c5b2a704. 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/94480f60-383e-4033-ba17-14cd04bd81c4.json and https://artists.proofprofile.net/proofs/artist/94480f60-383e-4033-ba17-14cd04bd81c4.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 0xbe97bb2c2eee3bb5a37839005c7ce5d57653f12e3f6a5945f68ec0d0aea4a2b0. 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/QMFMF1515750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ea72742bd4f66958e7dc8e4a082718cdd1e10444768bcb822ea0d5b6b0a0be. 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/QMFMF1515754.
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 0x96dd10592a3cb3db44d7eb0fd1feeeffa8a001004b47f1454194a48db72457f0. 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/QMFME1523205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233baae14f2257bdf41eda87b5fc2080d0edce500123c5347513af4be180f11d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMFME1523203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7396903c7eb547b3bcfe222f4751e9ec6dcf0aeedf339e7742322c88ccbd72b7. 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/QM4TW1605582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ed54486b2b3a21436aece1f08581225d340b7883317e4160345cbc3dbec9da. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QM4TW1605589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d907010bd1c23b614ce11da4541121c5d632e6cf289b65bae786cfe7787eef2. 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/QM4TW1605591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7bf90708c03de5ba99d30c9203c12129324736a3fe21bf74894672f69d1b76. 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/QM4TW1605592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b439e62d77067777cd4e0f26b13d8dae0f4a95367eabf233afcfe966b5788ba. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM4TW1605578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b9d6e5c7766ed9a4d0ed4448e986cf1cd2aafdf3dfba82be9405c44198c05. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TW1605585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9211119713c818c191a1497035e4357b4acd2e344471ce382c6a10401c07b321. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM4TW1605590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b43df6acde3c398f9a17916adc158f14588d2e905140acfd67f8198010259a1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QM4TW1605593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9347ba605d9578305977d627a775729cba6385998cdd0697e62702ddf169861. 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/QMFMG1504957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaf142d5fa71bf3360ad8bf3fd94102dfa872b8aed737b8d28c13f9c43be516. 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/QMFMG1504958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd503034e0fd3807afebbc10f81dcf48088a7f9a0ade8b7bfe6a1346edcc9a. 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/QMFMG1504960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834fb7cb193158d997dda7bd9cc92a883bad05f4a5a5d21ce009a606f9fa3594. 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/QMFMG1504961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1aa27d65c6990fd20378167b0ee7f91362f4db4492c089000993dc6d13ffc3. 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/QMFMG1504963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6013fff4f93252bf5baf176b93eb77944d7373b36fd7411645ea61f57965a686. 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/QMFMG1504964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1710bf4ae0e91eddd199dfe1e5db174217cda8b8255e1a8e9bfdade0d4ef12f9. 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/QMFMG1504954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926da18d9baafc4bce510fd440b5ddf7136ea59b0016adcad548558a359c1b29. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QMFMG1504955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03f5f488041cc789e9d50116e1f0f7f35834a086dc97d68d31fba2043ebca00. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMFMG1504956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93c108654bc99b7b6ab123d18a24f9039ce02f5a9ea1637045064f82aea38a6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMFMG1504959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c9e5852fd90e8318b2d1f2b06dc9c33ce49b2b60b052006dce1294da63af95. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMFMG1504962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915554b9069f8c22372e1ceab9b3d040c517bce87bbc1d2e8019215a4aa44636. 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/USHM22380002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf708326174cb42768430415ecd469800998c330581aefd6925d0a4b0975ce1df. 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/QMFMF1555824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e84faf3c173003ee543313909db3bc770fc892609ed8c85d8b65f4325505c. 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/QMFMF1555829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd764e92ef014510f3f07dc70ab8cd2ebfb21a9e2ed3428006979e23b21eef00e. 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/QZ7361801997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabe35d8118efe2411febdd00d3e7c8d6c271b287b35ef3ebe87d298f01b7352. 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/QZ7361801998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b2a746bec5e301b477e1d003b3550be7fa804523d4eff03bf57dbb6cf97460. 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/QZ7361802003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa739c19ba04c99f6aff5a300a6303b7698ff5c9255e6db886e7a0002912b1. 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/QZ7361802004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb6343c4d11da83cbdf5d710441003735f224d2a67598396a2f2280182eb2aa. 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/QZ7361802007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840ce3d5412708b116e37df11201dcde89e460361ebe7bfd98b9a7954a6ce277. 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/QZ7361802008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4965fd40f35e376198c2784d6b857b0d2dce6b03e1625f8377671e0b8376f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ7361802009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5451ba652b8619d70b6aa69e39de9bce028ccfcbf02f0c5db81b3b638daa6ed0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMG1518187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95bafc7506eadeab0055e066883be1345775979610076f0730eee904a4a9cef. 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/QMFMG1518195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26978e7d3e0997023c07870d492eb504bdfb491b917a35f246c57189dc3c99d. 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/QZK6L2555028.