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 0x0c97185a3051bd4387373e446c94a8abecac8c474faffedcddff1debf4f7daaf. 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/8a6c6e62-a617-4d95-8817-330cc2fbf8aa.json and https://artists.proofprofile.net/proofs/artist/8a6c6e62-a617-4d95-8817-330cc2fbf8aa.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 0x1d8cc71b46945eb3c8821e27f5dd22b70b267d6c4d7ba4413463cbbdaa8195e6. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZES82409185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712fa8c56d7384952c52abf247d59f475aa1afee5ae622dbf7c6bc31aee65550. 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/QZK6Q2496679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4476d638b517ee0072798046f2921c5d37a53f8c378489b23ec6d2af86eb90cd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWY2476214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c9ad10cfa7603e36e6f97ffc0b870c3243f61458d35954b14e54e0d93602a2. 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/TCAJA2434998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc54927d20c5c2270959437df712e7acb2dca8556c22329228b4cb2c6f7560b. 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/TCAJA2435003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b94ae30e8b6529890c348f346a730a4b445bc398a5024db48fb819d744f769. 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/TCAJE2569771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ec3f127acc9c7c06a50358b9d09864442cb9a2dc705bf6c5dd509758d6c4f8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:13:21Z), 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/TCAJI2522938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b313b0e6fd6679845b919914669bfedca07ace71af4f3723aea86aed4b032b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJI2522863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842f82a95e4b280351bd24bef841f1ac68f69f7f4878a66ab466b723022417b6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:03:54Z), 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/TCAJI2523949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48289a9de0a65d47f64499107383c093f52997e0576c47e4fd156742b235c6e4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJI2526750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cf6bed7a999fa0f6302dc3f0199cda6b972957ab96952cd514df7791ba5e67. 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/TCAJI2526893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7f8f540d3bcffea6a6d8b9883224a283dc6bd0b163f9dc5b1abb12d7a2e590. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:12Z), 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/TCAJK2500651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797ad3073932ceee653d178ffeedc3ec6b2f942e7a9eb8a2b2f44ac5dc0dfd71. 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/TCAJM2543200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e3e6ffd90ef15f52777a7e1b9dd7257389aa2bd8139506e8bce5a258329ee5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJM2557147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402babd7708f2ed88a14913280118c7413a9f72c2eca3f7e0d8bf7dbfae8895d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJW2540935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6300dc69a01ffa0e0c8b241a8f484e52b91afa1c7ed63584c071a42e360edf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJW2540906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5835a9df305ceb402e81d80cc7e58d3a681c53c90783ab87f1e243c311ae3e6e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJW2540912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f866edd7a8b627ad716c8fdc78396312025cb6f7bcd5d6e42587ab8920607. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/TCAJW2540913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210320b6cfb34b42b8a600a0e56f3f317a6aa399140fbd5b45eaa146291dd5d0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJW2540917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee573bcee5a39d0073d9433714104e3d56d44920c3a890fe27be0ccbdead335a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:08:01Z), 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/TCAJW2540919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac4acd7ea573590e8107e93f2248defbd9792a1c2618cc9fcefdc49d6e0fa2b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJW2540925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf538f2911e6f70c110df6c6bfafeb4490b4b4ee8fc1f45254405454865e60f. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:32:02Z), 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/QMFME2583747.