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 0xce47cef1c631aa199d713ee57d795a592eda73bcfe5c2fac5db3ef5df04fc2b4. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a69b40f-40f5-49f5-9208-9b2cacd10ec3.json and https://artists.proofprofile.net/proofs/artist/8a69b40f-40f5-49f5-9208-9b2cacd10ec3.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 0xb11d1b7fcf8affb03fe27e26ab7e713c7b2aa59f8346c75e829f412029734d99. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTV32470101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277eb8620194f5b98acbf24ff05bd7ec00e471cfc3fb27a973ed06a09d53b28a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTV32470137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a406bed2f502dea76669602d93d0365be70f7bace1a55cf9d838a4e71b8bb9a. 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/QZTV32470541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9976a5fcf52f7646640c6524f325f56617dd05f80e854e96437b1da1cea25d67. 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/QZTV32470766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a2696a3e6059b1c320bae6cc59186c612419955a74622e709559c89d0f54aa. 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/QZTV32470828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db1797261e71ee6380467f5978b0c2acd45ba88448715a1a71f49d1d057590f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTV32470939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5290ad3a9020231420a39d2c3da05860a9851759d268c19ab8b49d25b72c8394. 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/QZTV32471090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18edb9a5396cd1b32cb1a3ebaf3e49ecb477c3bf63e7b9b9bd7fef35d7fdfabc. 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/QZTV32471233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae6565320d2ef91a10c926f7249aed720ea429045dcb535324b9672d008611d. 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/QZTV32472866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d68ae33edb40230fe66384f55ffa1304da363194e42dc19ebc94507df964e21. 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/QZTV32472972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25bd2badbb633bdb59ee940f3518e75739f2f8212a2c31e24cfe287c83aed1b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTV32473095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607684d103ab0e73d257c6e89f9ae7c6f4f67f5c91ff6b914489498facad60e7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBWUL2497428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e50387c60cecec4bd13266512973ced52bbf49aa9898be66a414ef749c1345f. 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/GBWUL2464856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88cfae357565f997d9e5e7814e7bfa9e60c91b5868ba01a2af70be158cad2a1. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZTV32405493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea81efc5d5582c95ce2949506c568e6e3138f580a6fbd0c0bfa1ffd052bcfd46. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZK6F2313378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff699e46520782773e8e7f28f74af3f9bb5a54c20dd49c6a3109a9a874702075. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZK6F2313379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700324d1e3179b6a54fed4e879f71590b1d8bcb23900ae74f59e3928282f910e. 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/QZK6F2313380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e103ccb7435a0fc747e175d80f6998892ff90bae5193784cc294888b0665a30. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZK6F2313381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3533bcaf2d2736aee8f9fcbd00109ec5b15e370a21ebd8418a2ac8a28d819b1c. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZK6F2313382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88cfae357565f997d9e5e7814e7bfa9e60c91b5868ba01a2af70be158cad2a1. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZTV32405493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e50387c60cecec4bd13266512973ced52bbf49aa9898be66a414ef749c1345f. 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/GBWUL2464856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bb29c6a9e8e8afd9b8b981353d84ff38b0d6adb0ff2beef0b3f6eb819ee00a. 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/QZZ8B2391550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733c5abb48037129822a18f3f01815b90146f9b81144b202a100ae4e3d71e14a. 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/QZZ8A2329229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a236f93f1b47f0379aaddcdf91950adb60922e911b0399b627ca92c48dc09d. 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/QZFZ72395675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb86d68c2b3ec4b2ddd6997d508332a12b8203dbf72b04b1f1bf7fbbf64306c5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZFZ72395676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a4857ee8652ce028d77dd420b6f24cbbc31baf7e8af0b8f0919a9d9a0fd0ff. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZFZ72395677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0647b0201a052dae05c8735a23dcb38f34328c17eec0aee82552562f83b84223. 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/QZFZ72395678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9fdf9e7da6a58676b5b55e4426a17beef34fb47349751d6d069fef37cb5569. 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/QZTB42287552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf89cc4d16c502e6b3e5f47efa2dd19861ef9e38cd4f85e49170d1ee01ba8b5. 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/QZNWW2218565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dacdcb3bd7abc3cd51e442da9bf069c4f537bbb841962d42e01e6e06a888f8. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZHN82287635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fa08ee659775012abbcca9220ba09bd416639e719fe9f27dffacbab42dcb27. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZFZ32270580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f3d1ed22f8be17f3f41355927c501849d7966fca7adafc4b755479b21031a4. 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/QZNWT2174063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb4c44b3bd05120ecba1ba58379e08ec56b70ab2abfac6503cff0920c269990. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZMEN2131721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aab5fd3a7397dc157f222ab611701c030dfe7427a90fe29936c931fec60f5a9. 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/QZWDE2528665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab131ca15392c35f9430bb80d11d07b18e51fbf92a159336ae871c5027e27414. 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/QZZEB2400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf67e60ad846d3d75c1095726fec3bfb9d2d86c1c3b6d2a1f3945af4d0e3d178. 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/QZZEB2400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5e32a343c9e1e5e876fe3c19c91109df9eb15a97b7b49fe8e6b8352808fc86. 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/QZZ8A2414753.