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 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 0x847dfc93aa971d272a35e230781d353af55dc53e258f8210af7a9f38f84d3fdd. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f948168b-ea25-45e0-8e73-0c9c8a99fe72.json and https://artists.proofprofile.net/proofs/artist/f948168b-ea25-45e0-8e73-0c9c8a99fe72.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 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 0xdcdb6b0f530d6ae899fc72a057c04d4cf19e7126214fbce0c3d6703d9c110fee. 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/UK4FM1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe10b4f27ec8e8d10f4cb9d515a2590bc414e63d4e1b8b54d094c5aaeee68e13. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/UK4FM1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c8a6b6e016679f7f42a9c17e78c6ed3ead55603e823f3aeb2dfa6ad549e831. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/UK4FM1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088ec9b2aac28fd10c5fb9156f69c17d4c0afde930dfe752cb8d643ae2c70143. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UK4FM1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e30c9e37dd9db883dcbf801961d94624d8008f415f901e1f635f34cc22719a. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/UK4FM1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb767c62487ab69abe5daf394c097197eb66fd03d02f2dc64f3aa9a9ab8f58a31. 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/UK4FM1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dedc2d826df014b1bc89a0740f29d2f4a825b9d152f22c62483af8b0d74e0d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UK4FM1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9e89bc7d2a697bc747ebf5b174cb926550e4e87ddfa3a1c88ac84b512f761a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/UK4FM1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a7545c0245551d670b212fd91236fca9e034cee3c10885f764f5c68923925d. 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/UK4FM1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc259b150cdc2868811bb5664183967cbc96eea563f1c6405ad617668510276b8. 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/UK4FM1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd56019240a054a42622399c744f5a945582b71d9b3ad8a6760e10c3262e6b1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/UK4FM1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff54b8d2a8a024ac8436d7df9ee2686967cdf452485633371b3ec05122b2bfa. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/UK4FM1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cacb4d1e870cd574c8791531714987aa67e8c112d80ecdbde2df5ce65e4348. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UK4FM1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60574fab39233773035257385f4d8da200728c6e8db681ba2daa1bb6787cac8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/UK4FM1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e65d73736f93d6dc082a6f7eb900e64fcf92801a225ddf3d302164205aca33. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/UK4FM1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a9e0ecd26a91078724c9e22120da2acbf1aa750c837e6d17ebb4f42c31b73d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UK4FM1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a8fe94010b430409126febfbb9798b88ad46f940dbad8c08b1cb296d77470b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/UK4FM1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ec34305f652783efc5a8a22c6a3e381d9ab66c28b2a45e0f4abf44d19bbda. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/UK4FM1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e752b9e1ba21c8b54b9136b0cbd1cb7d63a3d6e4c4827ec4e8add9ab2ad98b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UK4FM1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47378e72771c8a4e3fbde6e567a74abd5f21cb26f0e49a0f84c7bea0753b871. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/UK4FM1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2687a5b3915e7e67e5f98c969ee7a7418d3122e61ca37054f41970a59a1aeb. 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/UK4FM1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfc27c6ee6a6241114b8d1aa42e109d4ccf6c6eb0d0e81059363fd7d45290a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/UK4FM1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bc8a49f1bb14fb33e1992890799e805d8b04dd692ba31eaafac3efea365dfe. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/UK4FM1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e8d3530bce9b41e8e3d0d1eca8540eeb8a52731ed99dc34ebeef4d6634bc90. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UK4FM1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374a7739488e03b8e783daf1d2ade9750d9d9a552e0f0e24140e61f89e0dd633. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/UK4FM2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2a3f2c6409ff382d38366f77ca76208b06a085673a8ba273cfcd635ac289ea. 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/UK4FM2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2108ef00d0aa5923b96971aab05977ce7a56843d8de37bc8e785acc393899d50. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/UK4FM2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf16e63e1a7887f2bc5d83f4c04e214793df44278e33cd258e5726f7ae00214. 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/UK4FM2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6154dd46ba8fe88541d769a09585e66d255fe6b89289ea875691f7389f45b7cc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UK4FM2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd85e8c97985b79aec2746ab3a39c942caa16cafd6e596b5c2903491da920a6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UK4FM2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a536b455e845f9fa92c04757d6e2b41eb930663fb81c4a950ee11ca804df87c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UK4FM2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aa2e8d08a03ea8fcb74de883b99d70b34761d397303e99d268cfb2534669b2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/UK4FM2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b382f34e2e66965b72ca816cdf1b349950c908ae1f7be4ecb05da7aba6cf5. 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/UK4FM2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a3901a7262d645d0ccf39d3c69137d7ebeef1e5eac8afd1d6a40f74d8c0e48. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UK4FM2400005.