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 0xa8ce3f670a119fccaa29ad594398a5cf48c37580b18c156f15bd39fb19a94c2a. 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/abbef488-a979-4ba4-ad90-31e1146e4d66.json and https://artists.proofprofile.net/proofs/artist/abbef488-a979-4ba4-ad90-31e1146e4d66.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 0xb17d807febe25bdc883c42ccbb647b4bc0367def61ab16c8efd266dd8eb8b49d. 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/QZTBA2258611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d75d223e29918a60ec98fca526ac6d8dbbf4e64a119fee9426e5ac4621ef21. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZES72378493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c88fbeff99e34ec92cf75e975c19d16489e846d7148ab8e050004847cf3cc95. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZHNC2326558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd7314572cb1aaad5902866e297d73fc24e007414fe220e2ae62f137b1be185. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP52308834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabdb7bc66a11c07a6e8634e4958ca61b4a346416406fdbbb0eefca29f83ab77. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP52308838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03afe59ce18fb22050a0820b7c78d49dcbe906340bd3f7d1cb12cc58d911077. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZRP52308837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe007d39bf1da41dfadf73da09e002dc681a283bbfc870f611a7dc3806cb82544. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ22484658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9ecb1a831b744397cdbe70669a7f8bbe122c4bb743803b66d1f55d7f76c061. 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/QZFZ22484659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c1203e2ed7305916ce7cc57cef3bfe6d30fbb69105d327cafaf31bdcd8ab1d. 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/QZFZ22484660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b502341425720da016f36862e8c734590d9614cd3aa9cf51be8f55b2e959d13. 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/QZTBB2457766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9a212e8885f9c49f19882e0c4008508f7309cd757837e8053f02183f92a7b1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBB2457767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9064704e90493542d641d774d92c02acc6abbe5c6cce5faafd4e38c78937ecff. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZTBB2457768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594ef768b86f51d27ac00a882cc8dc3c296ca85c1e0697d8821572d85eaa18d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBB2457769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1ddca27f2eac7175aeaa9fa4931c916055138c40fbe390239786b480070cdc. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZTBB2457770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bdf07c2453c6257cf971a323b4087ade63a5c910b3fbbdbcc22a293e67d832. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTBB2457771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa537efa17581af6f9a06e0c6c46a50863f8482c29b5540fbdaeb68d624e08a4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZTBB2457772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f893215f67f5fe7471eda8d8985daeed4c6f05d923d52b2b77cf24b10ef4030. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZWFM2448887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00a7248c2ab140aacfea8d08d4cdb3e67001a9ac3f801d2c20336266ca7091d. 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/QZWFP2462389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e62a6cbaeb35e9da52a24cc3252d56aaa13ac5f95783d72f362140bbae0d8b8. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFS2422926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d16f42f25a0977e7c4674483b6bf9394baab61f1e0a00207423f8a83227ce2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7P2472116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089b38330e0313e2f344826368826b376377cbfbbcd20cdc76c0f22bd1f26f70. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZZ7P2472117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed91d43fa13f9a5886815b2c2e05a1a4da4a0dc769c3eae21eec77765ffe757. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZZ7P2472118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087bbb2b7e2a6bdb9de7d9d8a636e164a8e7176b0afb7986cf92a66997d28580. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZZ7P2472119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f9e98d3cf13e2a0095e7fa67b930a31b58fa12615050bfc93f93b0077180f4. 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/QZZ7P2472120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b01668fdb5cf6ac52c51fe4e18ef67ec3436c7a955fd78955baba5554926bbe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7P2472121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d72c2eedc3406cbdb50b68b63922fe549604d82b0c47d2f2680945530cba144. 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/QZZ7P2472122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08bac1050a9e4cad4e227a82df405bca3168a885d85ec0f100d6a47e43d24a6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZZ7P2472123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c101c7dbdff272a0f409b530b5a7641fb4778c406a9e13f0297e6f6120ed6e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/RUAGW2300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d756534fe54e75fdef0408d0527dde9ef81abbc85b2b49d22123e9e50bac4c. 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/HKE022371606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2150a37a0624eb038e3a8aa4a25541829d90a1a1f7e845140c421268ba09a26a. 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/FIWMA2400247.