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 0x7cf30d67a457a80ffa877f0c6d132cb5e1a181f34ff3cdc803e0e2d956a77c6f. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47c39f8b-b4c8-4613-bb1f-89cac436f6d6.json and https://artists.proofprofile.net/proofs/artist/47c39f8b-b4c8-4613-bb1f-89cac436f6d6.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 0xc27e8a657c57cc0ff395fbbb7018626aae316543dd33dea1403dc4c7fce075e4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOX9X3789904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7f807c042558b4676e1135df6769fa8ea1c5769b3faa0c6afd0e50d610f78d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:34:00Z), 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/NOX9X3789909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3355086e32aa67facbad925ad00ed6cc6da5249d3c85ae02476c0524384c3b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:46:34Z), 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/NOCKM0501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e83e4418428971d1125262c00d83ac006f0972e09b0f145c695b4a29aff2ac. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NOCKM0501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a60a06cc38a536341dd2b87c72f987fa23561c003241474218b4584be9c4118. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/NOCKM0501081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e094bb2526b6043e806581526890049576eb7c5e4b4d5fea7d651795da4417. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:53Z), 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/NOCKM1101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97817ddadcb0dc74f21acacbd7c8340b790ff7c961bb235b02c34d8976ee1a11. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NOCKM1101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae52787257767fbced27a239b7f5287129d65a615fe53ddf08c9608ae1eab090. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:36Z), 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/NOCKM1101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b9ac7094e6f9396ff1c32be5b1f8cb18ce5c6c2f80758156308b04a068996a. 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/NOCKM1101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2d4a6bf232eb43c1b2cb8bb0548a3419a18cdae3f2f2c62c76421f8e994cfb. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/NOCKM1101100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b756cf34bae7ffd939d0e8fc7847db63a6908cb978a6917fd3dcf569193f635. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOCKM1101110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4404604f1bdc363e1c1a29447f2b1f9199af6e76d8688f151ed4b321ab0fe0. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QM6MZ2591018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe349bedb8d8ffc4ffcad406e3a633a518c67c0b38835ff6e603687e94f138d9b. 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/NOJRA0715030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de94ff70d916a349b95ca28f478261c525ba80c14157864159011b0d7b9646a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEVLW2309009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b2e61075ffcc52f88abb1b303d9cf4f0e89414b56172dbe70611b2c179574d. 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/SEVLW2310014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b86a52167b0ecd6625d2201a03df7fa964ba1ba93c37cf6428abbb0925af4e5. 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/NOFLL0518160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb8dc51bf8d3ee59bdacfab9f595f49f4c372c6a05d64b9a976d25edd040a8e. 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/SEXNI2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e930c7391f1494e1346a30c6565fa7400b6f22e87012f6d5dd1e5840dead72. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NOJRA0715050.
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 0x103c06d769d5f4539a0551c427f8239a3519f1c04230dd70dbbeddc8a7a6bb0c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEVLW2312011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f3c7344eea10d2e4b0a1d7be314040acd9b1f7c9ae94023bfb027ee9c4c71c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEVLW2309002.