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 0xdf97d65a86b772733fc8dd6a8ac43075a927b9cc64a9d06c41238e84842c484b. 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/6f9811c3-e375-4545-b7c4-fc8865bf67c6.json and https://artists.proofprofile.net/proofs/artist/6f9811c3-e375-4545-b7c4-fc8865bf67c6.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 0x59a485d09808cd389e23883309f36531682764b4a4bed34511548515f61ae6a3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6Q2038093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc38393a18c06635ca0744cea08cb94e5cf4aace3b67569b2bef9acb5bdd206d. 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/QZK6Q2038099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36fc5e8801bf57afd64517044864a6d1d5ddb03bbee5a794ec5451284d6ed3c. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZK6Q2038100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4184acd7a42ffb7a3646320a422ae4fdbc5ad967c753a31360640ead609de95f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWR2183951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8cd540c908a4aed313be5f9b91a74d8b7899e408c05c54853ca92f3fe7af93. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:39Z), 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/QZDA42234193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64ca5d7ff8a16611ddc54ee1dd751ebb85759b86f474148e524f8e90db618c7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6Q2273290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338fd599086ba3521cedb22398742fa7bf79dc956bc26ca8b2e32457a71b75c3. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTB62371755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef19e5583904b03b5af9799ea76416b8789cd5f79481e75f3ed9fa93e7363861. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZES62465369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987cda0180e9de3e8b5e82f99104db3b839c4049b1bdd22288a0e48fefb96b44. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAT2424163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05de51bc6be968c771d15c0d9c19f3f734397ce0bedec81333cd61aaa6c7b673. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB82473703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ff6553a581ad280faca2f81fdd7edd0ae00abe612670acf5d7613d394f4c4. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTBB2408778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab57665015f56c82a42e505aea996a723c4c1c5aa6a5002bc945aacee05ab3f2. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:48:42Z), 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/QZWFE2480419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d51eba2e1b6e5564f257fb2f1a85311b947c269e8113b0c372792285097362. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFT2459863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb1c39de80c98e269f141584263bb0858f5bfbe4c95a542703aaf6e5151f0b7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ792413773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ab3fc3f7ba5f50bbcece18578459cf7a90e8e87866c456ef63d2a91314410. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:59:07Z), 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/QZZ7L2494771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27a78d1c0c52c793a52a6a93d11523787945eba04c3de11114dd6b36fc93196. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:48Z), 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/QZZ7V2467281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb1c39de80c98e269f141584263bb0858f5bfbe4c95a542703aaf6e5151f0b7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:59Z), 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/QZZ792413773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c17fcabf9223ee11bd795752badd2fe9cf5d71f055af10f988d97b6bb8bbd2e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7V2467282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d51eba2e1b6e5564f257fb2f1a85311b947c269e8113b0c372792285097362. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:30Z), 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/QZWFT2459863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeae87f55db00aadf335d87b318f03f78ba79b17ce3d7e012fba930e755d8410. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:57Z), 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/QZZ7V2467283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ab8f67c6f234459c35cd61b993ecaa74823831ab82771958849271396773b. 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/QZZ7V2467284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7717ee1aaf4ff4c8f517293f17db0bc8d36a5b7599eb50a0b778fc94dfd03af5. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZZ7V2467285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88e79448d332476a695172cad96d55218baa258e60524602b1d67ceb1fdc9f5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7V2467286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6831f88a58bbf3353cf585711380bf614bdb76f263ee53441f342548cef81b01. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7V2467287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ab3fc3f7ba5f50bbcece18578459cf7a90e8e87866c456ef63d2a91314410. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7L2494771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755a1298ef20c7596ea18c2518f5c5a9f15b0d57a7be307756ee8bcdb2f1fde8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZZ7V2467289.