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 0x195b2154c55ec2871d9d39e5ae1fc2c425affc5499d05a407b33a246c9989e60. 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/7f23c262-7071-4535-8cc0-00e05be1367f.json and https://artists.proofprofile.net/proofs/artist/7f23c262-7071-4535-8cc0-00e05be1367f.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 0x6c10681ffe6c812745683bba3ff478b30a3e5fd7d09074946d695e2cc282d027. 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/QZNJZ2336097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065b00c9138eef1d858022320c9ddb1306f954d45685a9988bba4269e0d7c0c2. 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/QZNJX2225835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef998d8f4360e8d483db6341d562f823012fd1b1cf2a9e2ab80f52ba46f5ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9M2362390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b026307d6232034d3e18e594ec4d0246c5f2f829a1eaaa93e8e56aa61c6b25. 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/QZW9M2362391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63625647072603a4a80f56f032c937df265a69ebc812e523c2ad1aecc20be0f. 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/QZW9M2362392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b11317b61f21f5ddd59c2b39dbad5d8e66b82ed23666473b9f8cea99810a6. 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/QZW9M2362397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fe7b490920d3e1aa7565cfa9e3025cf27e47e91aae520b0b15b023f8eece82. 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/QZW9M2362398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb376eee9f29e5e1d4b43d2db084cc0440744797e3d213cbd374ac77dbda0c13f. 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/QZW9M2362402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3914b7db90ba31470ce17c9aa21692efe44b8b3ffe2c94e02bd77c1bff0b9c4d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9M2362388.
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 0x431cdcef76a8ad1380524728e531acac0bd96eaca034863f419b7bb3a4826cd8. 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/QZW9M2362389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7b4649a25ece024639c5da50ed7f3cbcda687f0f098b3721d1d9de2353e7e1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZW9M2362393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb825a2d5eb3f835235e345c750fdde5097df0d8c4fd5b78fe50364bfa690fd7. 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/QZW9M2362395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a5f2c348956bc6e63670663405b239057b70ed89f1f0b72a9439976ab9c900. 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/QZW9M2362396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4222be046e287d71c9bc0ff0055946701e42e35f0fe58b4019e61e019ccd88. 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/QZW9M2362400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee596aefa76bb4ca97363651b56a602ea514b59b542e63b8a56b1aafd8dce56. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZW9M2362404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5765796bff2a0ad35dd2da5aaa7f55c58fd2550c749470ed9adf0b55e369673c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZW9M2362405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e81beb14758952eb4f436b050a421d088f1df5e9994467f6c3e48409fa1863. 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/QZHZ52265424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b676a21d019ac65cd89e3bd08c655d645f998cc741eeb97989c9b78ecc5169. 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/QZMZ92236665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0129563205f2c08d4545c23446b911d42c9eb52497025f183f9ead8c0cd5ab19. 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/QZMZ92236666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86036251d82c5dd606035aeed435319a8427c086b7cfc5622ca5a83b8b252d5b. 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/QZMZ92236662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0064d41cc9d7493106463040065dcd398015a1ed4f063adae714fb15414e70c1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZMZ92236663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea18a6de1cde03cb97ab5e0d517f2e16edea7f1c6d288c197ca0483520e25335. 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/QZNJY2203415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24935e50567e708b25e010c2fe962e4e5a6376662ea398f1c58d9009db911183. 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/US7VG2486211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099453c5071307d6ddec2279271392c9c15ae6fc2841291bcd21c7fff850e07b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US7VG2486213.