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 0xbd2ea9d534276a41c17def72c42857d38a69e1a9d2db093df348dcecdf04d937. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9942782b-923d-41b7-8579-c041d8478d81.json and https://artists.proofprofile.net/proofs/artist/9942782b-923d-41b7-8579-c041d8478d81.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 0x0eb92f0a5f4f14b708ba768362c5cbf61b94e6950bd8e52664500a568b7c3bde. 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/ES90S2302322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1182396ead9b86470541047bf57905b8c70bf0a6122fed08381a888f69051. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES90S2302323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3725e6985913f47f006b5cc5d3f97774d75ec00b82d80b2eb1bbf2785b960d9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES90S2302327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe82314f9d2ea1828c981cdbe03a2ea75507ea9fd4fd449542f789acc4d8e1f7. 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/ES90S2001175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96989015fa54699520bd257d5c4624da51baed3f02b70c3dd22f7159559f268. 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/ES90S2001176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb910b2cf785dac0d9467bde8b45f8d63040b99ebd183c310debc381a8eaa106b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES90S1700299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b986baeef20367323be60ff0c8a6ac6ed6c6aaedac66224483691169394345. 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/ES90S1700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb89af07fc894f8d9a0e85928f2c97abef0d58d903a5ee7096da4d5a730a5360. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES90S1700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ccf84d3af8cef1c942526dd06e9aa11a459721b0441d6cd2a00cb5290b3075. 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/ES90S1700304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffb3b2635a19f18a30e6f363263b4cbf5e388c6d066a76de15067e9286c1028. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES90S1700306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553de403089ee0f9473584c71707d86a0be00bc5de7cace960c38a11f4c79911. 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/ES90S1700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2af9ef6690fd000bcf88ba860f86386221ec5c520a3fbf32c5c55cb306489f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:12Z), 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/ES90S1700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36a61f554476f053f2fe86d6d3f7943da191fc2d85a8cbd434d69d70b48ee2c. 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/ES90S2202111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe82314f9d2ea1828c981cdbe03a2ea75507ea9fd4fd449542f789acc4d8e1f7. 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/ES90S2001175.