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 0x7e54243cb0adc74ea219ecb894d0f0cfcb25dc7fc6e711bab421e6d1c2d4ecef. 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/6d1a19a4-a6d4-48f9-9acd-ce2265e3033b.json and https://artists.proofprofile.net/proofs/artist/6d1a19a4-a6d4-48f9-9acd-ce2265e3033b.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 0x2dad7c0f790e4b07757bc3e19ff95bc172cade35ab7a46d3d26777bd9dcd7220. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZ2J21510404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5db1f2d4a9b3110d6bcd8ed980d635da7a2c18a5797066e715f03a0403d0d90. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:23Z), 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/QZ2J21510405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f102e1363dcffd88b7634f3fcd185f1823d5100ea77b63683a1fb8d4a2879d0. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZ2J21510406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af07437786abaa9a3a28f3d84024978aa26a96270c049b81c135ea14517953. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZ2J21510408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8bd6a0b91c13397f335531e11acadbda00f5fe61573906c9f6689b988a1dbd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:01Z), 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/QZ2J21510411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652e031e6691491705d6283a04a607c021150b35f53db117b789241ac8819cd0. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZ2J21510413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543cef235de19481142bbcd844c91396c4930ae2801d1e1b2ee79d2946719ccf. 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/QZ2J21510257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6ffca131afc7dea6fe12c0d0aa9f7c21e065cb1108e4d76fda0bd7f68d8270. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:07Z), 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/QZ2J21510242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825d8bd6ba25c112791c3e28d0fd31de070c14ac8a20f370e6b290c804fa8a85. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZ2J21510243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbb6b03dfd4b621e11677587ab621d164155ae4db49bcd4f3dd8f7f7feb236. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ2J21510244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e202bd30caba080a574bcd6bee9b038a5f3aa8add8755593e0fa52eb1794ac. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZ2J21510245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b48cbdb2164f4cbc5a12baf14d3e2cd7196458906d2611ee1b03b76557a5da7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:56Z), 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/QZ2J21510246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2775bc867c3dc0ebab1a321ec129ffe0d99c688cfa7676a8cb633fa8df066e91. 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/QZ2J21510247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950641526ce5a5b8d223741e8fe4f8bcbf50ce0fbc6514b714bdf3c0d52b3a6f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ2J21510248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c90cb0c289a84c1576ce8a35ae7cc1e0a332c4555974da1b7425de142d29266. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZ2J21510249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a7c058917eed2f18a5e009cd8318e67deb83f7951ae0df1c08dd79daab666f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ2J21510250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe9f7ed64a2f823f478c48605eecf10758b2e3e23cee0ece30db61d1cb4a1ad. 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/QZ2J21510251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9764aef920aabbe3fa8a2dd18e6783d49a0d2e36920382e457e315b5a80dc0. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZ2J21510252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ff169f1d6dac575a6d0b95b821791bff6596a012a7383c3e583f9cbd3a3379. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ2J21510253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1375c7b0513d7fd0e52373f8bf739af93d64a4e23b83d53f4e66e7dc178ceaf4. 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/QZ2J21510422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cef7252fe1afaef72e66a2a7478108a226a22650c021ee280edb9dcbcc0179b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZ2J21510427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14aace4251ce562d3d71088f4723542b12c3fc31ffc31d4eb0b7f74a94e463d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:07Z), 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/QZ2J21510439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc77f353a5d2bbbcbe8cfda7a0d19b01eb5ba3b8ea6c3360807648f803c54cc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:07Z), 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/ARUM71000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00994f9a489f740e9190a4d39730ee170178b5c8347412f733812b67a30d735. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZ2J21510767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fd2bff89b723e394838c1d06ae2f4a0b839e97b1d9355797acc90391db5376. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/AR2D51800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f151e91cf502bd8f722a7e246edc9ab730d736cc43a15c7d6ee3b4437fa6f2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/AR2D51800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee9ee6a5f8e111f947d21dd0a6d4ad3e29a24eae5de2a55694bfc6c682195c3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AR2D51800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90273c121507b817e6eae1736a667614f120561c42c7a24c47981cf6fc914a5. 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/AR2D51800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3d4a36d8c51409e4ca5ca08127ee81003d27bb1e016c079ed67f848ac94e8f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/AR2D51800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3474b327fd539390a7425117766cebd9b33e447639fcc44f6c8a6f3965155937. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ2J21505893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb584ad97c71aaf54cedb1e3d443f641a9e2b8798bb36d065199a402d58a11f3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX8KD2427617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a764f3d0a6343bb4cbda74beedf9a51e5d7b178fd67a88bca603d5855d224b. 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/GX8KD2472147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ec40a9422cb7c33e347ce3fe6ecaa07f8558af4b6b0ced512acec94c5445d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ2J21507306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7634561037d2c4e33cf1deb934ee14b102bb73a665db774beeeb65f59f531de. 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/USCG60810683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7634561037d2c4e33cf1deb934ee14b102bb73a665db774beeeb65f59f531de. 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/USCG60810683.