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 0x1ab89d81c7be1b7a9eb048f04eec21703a389421e9e4904f8a3af5f0486d1f22. 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/03eaab33-31b7-4793-93ed-d80f7796672b.json and https://artists.proofprofile.net/proofs/artist/03eaab33-31b7-4793-93ed-d80f7796672b.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 0x1789e724f23ac6d06b45a2722ebb42e33ab887ee221171b585f4a49924c266e4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMEU32008345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc983d1dbf9b9a6a1e5c03ce6ffdf077bd80bdeffb8a5ac085dda78b94cf20c1. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QMEU32008346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b0d0ac567165f33c41e7e3b10850972291dae1738ba0553597490ddce3433. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QMEU32008350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd912888bdb14dab03394899eb0a8e831c9d6b519e291e5e9450d560805098c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ6ZQ1859363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd912888bdb14dab03394899eb0a8e831c9d6b519e291e5e9450d560805098c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ6ZQ1859363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928e7d51f69887d080473c581f2ac9875d57b329a7680330e5e8c4cc90615fbf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZ6ZQ1859364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cda6c7d0da2faaa15b6ff4b6d5678ef3c39b15cea853661b7a9b9bab2a60ebe. 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/QZ6ZQ1859561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576908eca2210be9f1ef91437227e311481f779ae287b3140466e8f216174483. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ6ZQ1859666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dcc2d6ce0dbd4afaa92f695fb527ad753e688e8314e7ec9cc194792f107c4b. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/QZ6ZQ1859688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef83d6f52240ce83e594d9fc658299af6afed911d15dfb9967c13d01820b26f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ6ZQ1859689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaa93e71ed5310588c55b75e467e249c6954f5978364ce2124152536124cf47. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ6ZQ1860570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ef81ce483aa336cdcef10bc907b962fca73ddb8a949cd47c408a55c43ad3f5. 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/QZ6ZQ1860641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658fbbf738b0e2d118b0d249f49ada90f837dcccbdfc845bf102ea339d15f322. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TCAHQ2398810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0850dbb188b8f2e618be9ae14a57246c79158488870552717fbcc512ca107f9. 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/NLF711605363.