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 0x5a36403ad89567c7f8bcad9eef20a784d60ef90a86862a4fa3752e5492f78791. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8db93f24-e9de-484e-b10d-6223e46aa795.json and https://artists.proofprofile.net/proofs/artist/8db93f24-e9de-484e-b10d-6223e46aa795.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 0x4a83ee6e563c39c9106697aebdc096de12832897cae1a4ad28d613b3e7e9fe68. 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/NZEM09600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc790eecab2fbb6f1108c45cf4bb36e09d2780bf64804b018124a546b6dc129ab. 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/NZEM09400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d6244e840776c2e73470498600c1db06d0c15698c113b7030d936ed38a6b24. 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/NZEM09500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6530890482512d119f93d50b5fa3c64cad0ca05252d65109487b98d9922a9e92. 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/USL4Q2061887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cab3ecd83025b396f23bedee3222a0ee99a2ba6300ebcd4786ea4d4b14da5d. 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/USL4Q2061888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf934c6fbfafbc536ae7b1d47cfc36655f9834d9a66df1d34fda17cfe88e585a3. 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/USL4Q2061890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e22a23d3373ab69a05586ec3b0fe1d79632f0640f7bc0798cb04bfeae301dce. 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/USL4Q2061892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43e4587114036be6416608cf6e1a9096a376a08afdbadfe4c93895c95a4cade. 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/USL4Q2061899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426f743f7f2af89b16c84a4230cc54c7ffb6a44843e5a887ac1514ec5b640ff4. 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/USL4Q2061901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28422c6e3d0e632acd645bb99089895bfb4437cc7595ea0643d018895f793060. 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/QZES92045775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fd7fe2839deee9d50e459b647cc1fc665b76fc918869c8a7211b254c6a1e50. 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/NZAZ11200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272f29e0d9e0e53eea4930f1621470f1c8ec272df2a0d16e3465bdcfe6baf94. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NZAZ11200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e90c6ecef66aeab94fafd1c80b9e048d13da3cddfd506956ba4f66fbfa51fc9. 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/NZAZ11200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d476c2ce1132c7908cd81278548fa4dc333d7b56b358cecfe7a8fa1b98b440a. 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/NZAZ11200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e962ddba02e92bf8a750aaee961a2d201ae30f3599fc47e099c950c72c4bd7. 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/NZAZ11200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6510f03113cdfcfd0cf76a0e7557fed00dee7b5a65e382327aa4f50604086c. 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/NZAZ11200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3bc6115102fa68eee48276e2237049721ee8d64a182c70c38d602fe4fcac95. 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/NZAZ11200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad949ed0d1398e947190817e76c0a2b1ba7a101713a3cf55585b532302c5205. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZAZ11200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bd95d424a659478ff4b645842d2f9540af4353b4ed31b002f638c18aeff9c4. 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/NZAZ11200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbf98995c23118ff27dd000777d62874a8bdac77009fc3c04e3a377e175acfa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NZAZ11200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde33e6f96ccfd4b43de3e56b2c343642b62226c8acc4706547c9a4d20bfdbede. 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/NZAZ11200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756875b7025bdf04bf50dcc7aea63876899e74e21c9a32c91a1c9bcd1cab9f38. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/NZAZ11200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eaeb71ca0c1319a8f970d3ad8f06cd02c97d8c6398fba2a1e0e1ba71a489e7. 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/NZRI12303413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edf2a8dcbb8a17684768a907fe09af5abf0ea4f08bf6825596ed6987cc73ee5. 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/NZRI12201253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114b5af049c13860913c2897c5dc3c8cc45faf750a9622eea366c59aff5be30. 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/NZRI12303415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cb8877042e24e9013baaca75b56b75627fddfbe585c6b7598b1e190b780912. 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/NZRI12202875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8cf38fc907a629d1a2f740066cda0a1757ab2d7201d21bc1c9883fc74f2e6c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NZRI12303411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8625cc28fceafce3007db2c1babcba4a9840e6d29e63b88eba92fe7d61091ff1. 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/NZIL00900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749d5ab49ea20645d9d153f38cf4b3f218f14c534e93fdbd0b3a964e8fe95102. 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/NZIL01000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7649bff36c3a43af6a7f1878eacd855383fc3abe69dc9d2f73bfa7611b770393. 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/NZIL01000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56078e59e414e3d4d5d09bfbeb2f7fc91e5f8253fb3b2dfd200f9bc4a83bc1ed. 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/NZMQ12000002.