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 0x4bb2927607617248348f95cc23cfcfb08af87dc82789c28e0e514cb2f2082843. 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/26fd5473-cb43-4ad3-9dfa-8b2536ba0256.json and https://artists.proofprofile.net/proofs/artist/26fd5473-cb43-4ad3-9dfa-8b2536ba0256.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 0xbe62178cd76dedfef366b834531470de436f6b969960f890d543a007ce978d07. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CZUM72100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a895f579dd73b9345550f298d2b16432f98d0837560e346d7ee3ba78f9a665b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CZUM72100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac54547fc7a32248ff7132f80c93b0db821366d27e0dc5b035242a782409394. 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/CZUM72100795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80686055248a69b9c8006aff455f468002bf8d96d78e67b6f21ecb8a0dba4a2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CZUM72200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84edbb1f806fceb83022b65fcdebeabe0cc291236267e204373c7c2dd2a2978. 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/CZUM72200793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2137a2f9f84f70bfd7dc55d0b97bfb23dae789515c482009e7a26ca449a0b8c. 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/CZUM72300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811413493722ea2b1a17c26c8662cebb83abeb81278c17cafb9ef8faff66ea14. 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/CZUM72301423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04768acddad9b6cb2475073127f47a3f5500cc94983508dd4a3994c56b104db4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CZUM72400632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a0bc262dc8ba6e5ddc232801997a0825a71ed4e10ba7f98a2f438fb4baebbb. 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/CZUM72400775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a92f5c390343450cc541c79a5b3eb459e5cd65224cdaeaa669f30a990c3db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZH442400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5c4a821cc9944e54be63cd58c346cc1f9e7949e4456e78ced46acca93ddf7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZUM72400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5c4a821cc9944e54be63cd58c346cc1f9e7949e4456e78ced46acca93ddf7. 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/CZUM72400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f256e00118c2240d8fea99dfbe08608be0f2175e0637f535a11cfccbb3d8c3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZN882541079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578d0c0c7daf8ed175b3054e75e3b2efffa3729dc2c7b5ac794c19c6ddc7fa67. 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/CZUM72400318.