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 0xcc31407dfde1fc734425d770b90d58ff4a2c9cb1382dcf97a396a648c7e9bc40. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32d06f06-a21b-47e8-8dea-5266066000b4.json and https://artists.proofprofile.net/proofs/artist/32d06f06-a21b-47e8-8dea-5266066000b4.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 0x141dce811e5f1b16cd6f1bf2516bf453b8c73f2e2a322b5bff8d7dc0f8645431. 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/QMDA61882019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74709bd37bda3003b99e897a87faf19c7199c84177206200c800cb24a22a9d7. 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/QMDA61882020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a0721e1f6a5fd6a8de1cf5d1739363f29c08123e494431c6c54a3472e2616. 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/QMDA61882021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ec9342aecb58e1d5bf4a6561e2c67d94b150194f8a04321bf029f58a23725e. 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/QMDA61882022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2913b6506c509ac67affedc94eca99925441f725b8220e586d425337c8bc61f1. 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/QMDA61882024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a699c9f368cc71b0173ec3d46fa8ee2bee35e60d75592b2952e9ee02d38a7f. 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/QMDA61882025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c91665a8e9097cf01b816806aa0245e6469f435801d4b70658145fab8652a4. 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/QMDA61882026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c8571dd9853b755b9c410a63d96b5f65f1bc98c4dc6eccba8946cd9cf345dd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMDA61882027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3c88ae417add2d71af237e6c42d68ba1ad0e4e0a4285ed3017cb6d498c6fd6. 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/QMDA61882030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b8406b8c366b13b3fe92aa212a412a2b9b096db0788ef7a19ff5b131ec4bd7. 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/QMDA61882031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99fc8ea19043debab1e39c683fe993521a60e47561f2c8a0d54ba7a26a8f978. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMDA61882023.
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 0xa59b4d77502ea887cf4d6faa894d4347d950ecc1dd93762a61cec243edd744d2. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QMDA61882028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8face63e3bd8f501130fdcd8528a26e0287c944616eb8f66ae9b9ae538a319. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QMDA61882029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58aac179412b46cb38ac718dbcf398902db4a35d7ebe2b9bf1afa649e38b332b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMDA61882032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f82b24f3b042b99a6370d492a448bb28ef038bc0fcf2035761788a9e2f5d328. 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/QMDA61882033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd3bdee483b335b4d7d4cece3083e2ea42be33898df7e712bac4abe27035f2a. 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/QMDA61881998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8ea04b87cc90ef9a630ee832af2dc23630c6ff622235293b2f5b9b99be0a94. 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/QMDA61882000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec84b09f06b2e4be100645c3c11246c86458bc8b2dde66b3580036cd367b5da3. 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/QMDA61881999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3315467d5676f84b7ae6fcb22fed42f427a227e0b2d3ebf597554789909b8b8. 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/QMDA61882001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e1bdf1b61da46a1ac9b6bf8ebf478f8e25ac40f931a75989ec06bab000c70c. 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/QMDA61882012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167da746310407112802a93b194b80934ce6c33611d1ebdd9360294275859953. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA61882002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1b7250500a1594df89808cf030c9c7e3137cb7468e600a46382d9a762f9ac5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMDA61882003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64713dc23bfded8930ed92185b7de2f7438eb4d607391d960d86d21076aed7a4. 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/QMDA61882004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba5bc766327890c7f1cc11e76ba5e405c8ffb57addec41a20fb27972a4e7c49. 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/QMDA61882005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3170304cbda127f87024761a95abb01da2f9fa125d539053230dbd6f0588702f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QMDA61881997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa21649d12f9c38cdd3e7e771ec28018e27fb429ca9d869cc7ded4885080948c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMDA61882010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa297b05f8980ea8c03088468fcc0467912b1845c134b25b5c9055ed9c01556a9. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QMDA61882006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9cb03b6dc050f2f468bfbbc73ff2b797ef09fcd71913a5b6116d4c2214e382. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMDA61882007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf28a8e3fbae93d3de01de15f4960e59ccc6c0ec855544cb6764861a7ec030c. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QMDA61882008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bad114b59079095210c0f30d2a0414742bd7c5772e3567c98b5052640252e9. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QMDA61882011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782d66c64182820dbc618ba8effcd57078c3c01426634b78d64557505b624540. 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/QMDA61881996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b24472d143d12590902c687885f1e9021529e6eaaf8a53ab69ee8c97be2958. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMDA61882009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe089eb90455a27b35d19f6fcb9b432d0b251cea1e739637a234324a8b972073. 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/USA2P2105561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915db37ce7828db9e4fd8bdb85181a9e04192cf12d2f0e18534bad3aae81529f. 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/USA2P2021457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5534bd014598e9aa44e03ec5e2da5fdac8e54bc978006ef08f6309b136fd7d. 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/USA2P2022243.