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 0xf838cf182183412f821f70364a29b31e0a75d4b03cc68e2a224ff8dd90ba981d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4920cea9-52da-44d7-a682-de15a82275ad.json and https://artists.proofprofile.net/proofs/artist/4920cea9-52da-44d7-a682-de15a82275ad.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 0xf245c29c5754b4829b85593d215f8314b5567d654109500dc3f0f233adfbd17e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGH1554412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42fd7d9ee933c1248af58ec6aa37dbfc31bd82792a42095b9ce2e5fa5ec7f8f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QM4TX2342585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc744f72445cb999c2274c992ab231353f7d6ec3ddb589b39cc617a63ff58592a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM4TX2342586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc9d8fc3fd5405678e3e1dfdbca1a70bfe2cd1d39cf30aad7ac3124c65fdb48. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMDA62189793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06bcd971df28176f106f2d9ee649fef0ae67b4e5f6740a3e981cd22c1736f14. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:41:41Z), 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/QMDA62189795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c8ed9639d1810aca32c03b3634494b6d54e5c47e897b16a157f16f08c040aa. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QMDA62189796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf2f22d98bf2bf4f643280bd8298ed3e039bf1768968b27549dcf6dd54ba7b3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMDA62189798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c743be5719f66b90d6a174c6fefd28fbc2d646df61f70f0f57db7da05b1ec48. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QM4TX2342753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0b554a996e6a34e703ab4bf862425a0241339dbff608839af74de2a351070f. 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/QZW9M2201837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988ed8764653bb693eded341fe9eaedacefbd272239828266c5ff8ceb3ed4347. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:19:31Z), 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/QM4TX2344995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe040fb797e6257e2be3b295757976b143623e4b8d06c7d98a98300692ec38df7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM4TX2391178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63c4d3b8cb68bcca145bf77d447f58cb8ef3d89cd94071e2a43e833459acf3c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QM4TX2391183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf287b396a476e83ca5bc658dbee230be119744832dda523dbd6e80d297afabb6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TX2391184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22735f6c32f4aa43dfb5d3662cf08d21ca56be703171b1728ec776c11e42a71f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMBZ92395843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e56705765a4649290d39248f896f5493ed43e58d42b79667b89ea17c168eaa1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM6N22468551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8336224a3b4eb18f954e3a8bd21d1c9f3db3752d8a8823269c61e9d0ac694f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6N22468552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd479a21e9059bfc3c71137cd52299478541ccf252a1d855d69637e32eac659. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6N22468560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e5f93c4b0bc28d74a40f0a222c689c206f6e8feef3de131c9de170e9a9073f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6N22493920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ea832fdf4ff58cd7ac6a1dea678667d9a402617423a30bac29ca85ebb36df1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QM7282544646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75e67b661747eb5814084637afba47f1a57c054bbf7cbd036601a2bb86f421c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QMBZ92596817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb7007d7f640c37ea984dd26d2df9086648fc535e6b5e94957f16829f5345cd. 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/QMDA72555931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b3efd4e55aea31f23a2b4767c6b29d3dbfaa4ead7d5940d02cda05c1bface. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:20:30Z), 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/QMDA72555933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1cceacf9ed060e8e8ac71afe4c690d28277f9d05ac9deb9f6898809316449f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA72555934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543cd94e4b55fadfbeeabbe8ffe63c5009807ad18709a34f421e28a36a892fa0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA72555935.