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 0x84b013e4d1a8ef40bc777b0fff841c0602e67f925dc3ef3d5aea1f337fd326db. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cb76da5-f7b0-49a2-b7b7-51e7e8b519d0.json and https://artists.proofprofile.net/proofs/artist/1cb76da5-f7b0-49a2-b7b7-51e7e8b519d0.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 0x648d5627cf48bb5a13030ba7ef255d8f908c8e3facaaa36df7ad8d817a58a713. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CAHQJ1920332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef8485d3f4be113ff67d69fbc1c3267e425e9f1399bd6f77b23bd69717f2fda. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FRIDO2010374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a0c259f44ab40ff5113264e8a36da25d8e761201a7b0497e943a7057e4d613. 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/QZFZ42074024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31524383b1efbabf72e1d4a47eb5658ce330259ed41573b6bfb2871690fdc11. 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/QZDA52032395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86de56eda35d29700d52f24156463ae6e04ab7c5708958b2b84a56b443f58d97. 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/QZDA72039275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f04d54696414128010249aa41806fa51c3c020d7a6f3ce1b92aff3268f94eb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA72099110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f7374d6e987b5b98d98859d1dfc7b86bdd63542378bfcaeab9a02009998050. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN42018791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa524a47ed4f8069ea66b5111e663c1a7379f3bf92fdc9a69f9753576f5b72b91. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMEN2032895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df1e387b15c90a0de8669a3f17b8655d531e730eb6120749c4cc43ecd7d5033. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZNWQ2056514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255b141b47d7bd4b21150c2ff2fddbce840a643da2aec7fb98e31a9baea5818. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:05:42Z), 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/QZDA42105746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050f012647f729ccce247acf745d940fb3a96bc8f81bb1f8d844b75640b8f8b9. 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/FRX762165458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9de4e5c3b27ce58d3581381191c6ec78373824ca36b6007790237a6ff63f424. 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/FRX762165460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa7d593db5c9778766cfc0f39d20e9e043e4889ff49f2ea631a4073ffc50d1. 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/FRX762165461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834a86366c8410ecf6138e53518a2ba27bf3ae24931633c6be679cdf6cc19f74. 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/FRIDO2212216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa846794f2ec284784c44b5daf1d2dae561bb80d0ff2665a2545f18cef23683f6. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/FRIDO2212547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11259df7cb072e296010d369ab2fb1123cfb9e7c19c6a4ea31378a3a764fb52. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:31Z), 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/QZTBA2286846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d5d9cf184824b536a1f1b3838dbef3f2e8b733124564586a7ceeb4f8b8817e. 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/QZFYX2361163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518b99c507969845c93d75d43bf79e39b720dd2fa840bfe58e60f27e523c9dc3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:57Z), 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/QZDA52339051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2058d52b1536831fa76ef84e6f813babf867914c0740380984ae582ae22eda. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNWT2444686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc771b26e2102f5b183872257d0081ca7ded1bd685150655746b198822082d93e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWX2478115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f5a1da7bc72576fea141ae8a51853ba1b0f524c7f4554ff6d6a308468553be. 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/QZNWX2478116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c08ec71bce17440b35b4b15459bde8791d136d4fdbb225318b573faabbb405. 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/QZNWX2478117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef8485d3f4be113ff67d69fbc1c3267e425e9f1399bd6f77b23bd69717f2fda. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRIDO2010374.