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 0xa384d098b1bf4e247aeba78552e3fe332d77cb74af2884aced4039cbfdbac6c8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aa51de0-6197-4a06-ac4b-aad40caf5d4f.json and https://artists.proofprofile.net/proofs/artist/6aa51de0-6197-4a06-ac4b-aad40caf5d4f.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 0xee48db50e5b657caed3ed308ecb8161141fe202a9d083d933f1090deb44aa33b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:39:52Z), 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/USANG2458728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de257ca9e1e34f59f3756bd581dbdda4e7cd807d5678ddbab3a515f57a560ce. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:05:52Z), 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/USANG2458736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3f4d78a815f6c43554ce2d86d6a02a518009031c4cd46e0375f4de422bd46f. 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/USANG2458738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661308e113a13a4ad3b19fd71cd6499ca51b24edbbc8a35f8f348ba2058c388a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USANG2458739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556f75ca0114bb920e98007dfc722a9773436dcf06170e81a71cefff17d10c9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USANG2458741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638d75bed066dd831d86f58ff8a89d495aea01cca3b166e3e656a5cf7a1014fe. 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/USANG2458742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862d59e6e86e3edf230780981def05ca81358fb931901dd1713d5be8a35ba9ef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USANG2462893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6167bf1cf7744f80053856f7aac93752a46e8b64afbd09732361cdf92d585. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:36:50Z), 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/USANG2462894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5092d31aec69aa380814fcca4bc89281cfaa030b15b404db57f40d3d0e54147. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USANG2462898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b82896e54862616bef468381d40f8c6ba10489a93280f7d8a0a23ea1a797358. 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/USANG2462904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d3daeb911602c3d77a00dc4050da752a229139a4213e4e7c29a21d65bc539. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:08:39Z), 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/USANG2462906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a1bff45538ed3e4e0edeb79fde67daa2db05bc855c706eae1e39895d7c7f49. 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/USANG2462908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a1550169732171bef171072bcce6f882ba948403fac8e8e5f98dd0c5c3265e. 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/USANG2462930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3392a73c519fc300b9cd0c050b4bd1fadff506e44a98a07f0deeb772edb489f0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:44Z), 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/USANG2462196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cf7e948283d2714ece51d80292c31964c80759b8db90d55ca6aa7d47891f6c. 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/USANG2462197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1c18285bf1153dda224209a4f4a861af58a0ff5787730cc4ebd12da3ca210f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USANG2462221.