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 0xa5062a5ede952b92694c19f947e6d6fd193541325c0ce01f157e5a6c7ad1d0ba. 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/3daab30c-135f-47b6-89c0-d9a5cacc3990.json and https://artists.proofprofile.net/proofs/artist/3daab30c-135f-47b6-89c0-d9a5cacc3990.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 0xd1cf4f974127300d2db31aaa3deb98f26e54d97335cdddf71a4e74f97aa25571. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFZ52073822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e730ee9e401b714a2c6090ae2dbf7fd3f2a9665559b8cb2a94b177bfff112f4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ52073823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f7d54808ae8b999b9846439fdbaccb73d053ddca60573fac17c581807c710d. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZFZ52073824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7192c6a9c5686840ef595f298cb15cc275a23373219ff67a274edf321ecc15c9. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZFZ52073825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256fc1536476b6c1b8e3ac14eb0c7f3d13ce2ffa88ea678f0851711a8026e9a7. 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/QZFZ52073826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dade46c9f324d37a10c5dd0ef8f364352a6d869864585c1a17c7c12c20ce805. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZFZ52073827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa194185e7289dc060f50dcd6d78cbbbcced7c7ef618a32cadbf6d8b5c109e4. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZHN42014591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5accfc3e8c2ad46e03aaab4257fc2f77034e90f7cff277ddf31b007ce5e53eac. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN42014593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35938fa2284c87e22bd85bc6f02c5eee30c7704d7d44fa8076a90673689ba69b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM6P42219551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73d7b17a7fac3d91f56be221783731bf4c4ab1f8b9e61bc38eda32de1e0707e. 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/QM6P42219547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e0ca5522aa64d2641365bbdbb27065b504026ac7b5bff9b72d62a5e547b147. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QM6N22263858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51878c3c9c64d887431da652f9c99d67c49073ac5cee48d3987e6c9b5643ccc. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QM6P42219552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8792359d4fa52de6b0a09987978c47615eeb4f44d7786f3aa9c4bb2c6ce8b0. 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/QM6P42219554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2079f0367eaf1b98d828676620f2c98e8befb07bfb7d1f36b1ea2681565274f. 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/QM6P42219555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3317323e928f8db2b43008a434a828e08ac1dda54dc965734ca4b858bbf58497. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QM6P42219556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5504285ea844064989ed7e23145aba057c5bf1b8a126d534dbab4cd7a3b5b76c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM6P42219557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9761c3cd8586bc15fb11e8279d5315fecd50190826bd22c4c1e94f5950cc6f16. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QZDA42365784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1bfdf3cf402919b1684ace2a74b0bda73cf45d79d386a8a4c38c4d12cde04f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZWFE2314333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f768f81e0f1ec76c0b5528a6081400433b5820c8fcb1c9fa419d91af9ab6de. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZWFG2347080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b108fa71da34e3ff2b955bab236ee28bed19a8b536fc9df5a3457cba8fd10de. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFG2347082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f9853714dfab47c9f674f6ac5cc1885dfe4c9e014a8f8b2f0a2969e892db93. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZDA62489814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c1b8d3e23a4f24bcc3ac61f395a3f052b7c40700e8394f8c2f268509de2211. 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/QZHN52490515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60198f770e7365f56192e58465241368b6ebf4d89c5d363fb713562e6ed9df1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZHN92470723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3e0c3950122c6bfa2ec327bbb1065357e1e7afb298be790b094a884b246d6d. 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/USDY42388369.