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 0xbe5479ade28c6d231db9f5efac2c1d17b91e7d4d3e0a1d7675de663fd5671656. 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/6864b99a-b695-46cd-bbcb-930efba7212a.json and https://artists.proofprofile.net/proofs/artist/6864b99a-b695-46cd-bbcb-930efba7212a.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 0x05b74a9bf63a1c121ab40bdc8324343f80557f0e52abc2f629a99ad326f5b726. 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/USHM81771739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bf00e917f9b878221364c3c6e97077d572eaeb92803f093483d565fa30c6cc. 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/USHM81771742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2944e0702b14e79515a4f259eba4d37d0e5b3e0d9f2203081696c3a4503afa. 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/USHM81771744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6ce1f42405caf6d544b80dff8c021cbe34769e15afd69dbd228ddddc91b78f. 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/USHM81771745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055f1ceb5bee25afff04e9e531ab59933a2305131de6af8d95656ef4f5a5dba7. 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/USHM81771746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2394db47619a55e5e8f2f446a35a28404d485846a6d00f77ebb44a070eb9b03b. 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/USHM81771747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68adade3fa230786878ef742627e02b6062a75b4de0ddebb58de6aa807dccf48. 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/USHM81771748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f4224228db0c1a84f815b88585aba5045fe6fa059c592ba54c13577f7e6cc3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:03Z), 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/US6680913514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840d960e824dda79198dee4e50012c29d25a536ce9e457bbe9de0852716b90f6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US6680913531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f1884cf0ccfabd35e0ce34c7c43a282dba0d9a75bbda4236ae42f73b5d3759. 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/UST8K1783106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1db65aa073f1d72d5be6f03943274a21e2d70742d9c0650a24d9b9727784b98. 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/UST8K1783108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873c089594161e2cfc6cf161a874ffe4fff4b4458fa56cb865fc5910abffacde. 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/UST8K1783113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f60b555a8df3107b89e7b8ec8e849761565ecee61955147f4aad3cfbd765375. 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/UST8K1783114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4535302f8c32f49db26ee5b68b54d7fc201822a2af2dd2718855972d4ad0816f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/UST8K1783105.
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 0x7b340e08ce7a1f9ab5f4c2ca39b8935b26f89bc789322a4ce0b6f46a7460897a. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/UST8K1783107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6319889811db48565c3f1385323d3f7c8409421d463ad069cdfb9bfeff155ebb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UST8K1783109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7affed2e6bba6af90994837af75da2cf191da090122be8d7b5bf8f9e602838fd. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UST8K1783110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2830d6fa1ea105379dad2f5053305d8e28f5fec38de2ce0d2045c0a9e504b96a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UST8K1783111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb06dca45e689ab0093f54dcbe3383606ed4c401ea0c2e3ecfa094bbdab45407. 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/UST8K1783112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf4fdee0749b35378f69addb59d05170555cba4b27352ac628be88c510259bb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMHG41694002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7a5564e6cd374942e92dc4f89bf2582a89dabe25164e496443c17ae53d9ff5. 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/QMHG41694003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b88ed61accb4fc37e2b56bdf8d764de678666b6bd9111e75ec9909ef9978d79. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMHG41694005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda156009a0a256090e7d426e3909fb71220813b98ebc6e3cb9ccbf7da874c719. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US6680915243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1c99994a2a4c8a58f65e49676f9ab795954bc71a2bee1f2c3ef98af3a19608. 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/QZDA51834389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c57df72faea465907f74df53b51f8293f08be10275f77ac911c158e889a1f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA51834394.