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 0x386aabdf615eae17d31a10a1013a8e5b435c181f10fe65d10276ef6d617d41f3. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ef43d1a-6c83-41cf-9509-2dd3317c9ead.json and https://artists.proofprofile.net/proofs/artist/3ef43d1a-6c83-41cf-9509-2dd3317c9ead.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 0xb36eb00447c516922646b608fc0561fdf8839bbcef27032cff47cb166b2d8b3d. 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/QZDA82439534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38a10ad4dae92ba8d77d84ad1c845fe74da4e8fb552b4bda245d55057e8c13c. 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/QZDA82439535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ad4ff2c25df8ece2e1c1589f10e81437643a0332eeb5cf2df97d8c04ee3644. 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/QZDA82439537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9c6a8010691ea337218ad250999fa6150e02762ec4ad03d08d5a267b008616. 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/QZDA82439540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220e928635b35b7c67bda4ddf89fd0152c28a21b105ec483ceed1cac42560170. 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/QZWFE2366229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220e928635b35b7c67bda4ddf89fd0152c28a21b105ec483ceed1cac42560170. 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/QZWFE2366229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da9268acbaa99b2c5851ea9941be4b92eae8ee59b6d129745f3151e265215e4. 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/QZK6G2260644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca764e4aee3d74fb8ad7c661ff9f754b099d3e20d14ad296afe1aed473b30fff. 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/QZK6G2260645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ef9aa1b30c020281334d3232de7215f21ac737324eeb15cebaaf3af65a62cc. 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/QZK6G2260646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7390e3c3f09bffb39b129bdb59572c34b157bd42c1853c46e78b652fd9d334. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6G2260647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f666c69447191d36ce01dddf6fa6888af08ba8e4b33df2d0239878304c71d0. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZK6G2260650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071776a1a75db608352d3b4a11e744f93f92b8d65bff1cd009101ba27af1b83b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZK6G2260652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b818709397ddc949012fee6407e0fa22fa01f5aa5f3d2b7c83f6f71482bf4f1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZK6G2260648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1fc2d071b9e2f5ee6b0ef2fbc08c4a3a75d8207e106e0a71efcd6010299dd2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6G2260649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bd00ec8348dcad223271f1bf9ed02226e369ce6732edeb300d7e53b61c2a5f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6G2260651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1739b70d1d7c1d489d3535707b0d6303cf56d48a5c858b3f46ab35998790610e. 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/TCAHX2435247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2003ce17892eb8a46fccc3fedbdad29e50505cb37b1750895047f2cf30cea. 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/TCAHA2345748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14de042e81385ce57cc7b69eea331580f6383b76f93a79d021ff67c3469e5992. 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/QZDA42326933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f65a58e95ffe885754556680accb983a4110a01311ca399683be72f9ec250d1. 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/TCAHE2387725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0d251764c5a89206936414b4bd42e35567f5831371648bd4785dbb37b104eb. 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/TCAHE2387836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e38eb8ba30d1e033a7e5142b99afe7233bbf258ae197ec11fea242fd24e4b02. 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/TCAHE2387934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aff00c55fd1bf2c397d9091debc8cefc1244205b737a185e2b33d85a2d07c3. 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/TCAHE2388196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950b1dfbe1c8f50ed113f67ebce3ec652d0397ee5b216257d567697062638ed4. 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/TCAHE2388476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998cc1ffddc9fc6653439e07e94b207660f94d446da7fcc840d5e300a2c45bc3. 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/TCAHE2388554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ea63318f6e294397d7bd306c1da757386bcc0db956d38aeb1371ccd63215f7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USNPW2400981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bb5f603c6afab38c6cbe1d83c526866c77edbde14f09320b1e44735692d7c7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWDW2428747.