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 0x273d3bd67420c3c000fa29e20a948010a14f870b46dc713134bbb287a61396ee. 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/0292650d-b6ce-4c41-b772-aa1470bca3dd.json and https://artists.proofprofile.net/proofs/artist/0292650d-b6ce-4c41-b772-aa1470bca3dd.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 0xfbab39280c852a9c1bab50cde424c0f9b840fa164f233a014e7c05d8f3c64d0e. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZRP42440958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4c1f01a43f2611c6851364dbb69087b2f635f2009c472142319eb810ce27ff. 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/QZTAS2475679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49efae231697a56231c788b29fe474a83eab00f3f23c3059baafc7ef3fa7e0e4. 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/QZWFT2426299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bd3cb6dbdd235c7ed6eff742a45fa542a08c54cfdae7caa8840eef7517569c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ792402623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2d621e7752b81369c8366e3531c2c9555f47a740b1c478641d44a2abee15a7. 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/QZZ7M2499763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24a97ec3cb88e2409472cdd0b20c9909e770a2e625678c55ee4d167bd26872f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QT3F32446635.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a79e1d307d7d7cd1ea6955904d11a4cd1d27d0a3b27ba163fd413611327614. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA52521318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e84ea059bb7ca455f4dc78a16331eff4260447f999217992b4f7358b7a743e9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6G2511894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4e081dfef5b38346e2f7e4114f8350664db76aeceae987b7343f3124aeeb53. 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/QZNWX2592581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295d8598cab1fe989ef3e186d30180ab8e2e00e822cdf966e80ad4fbec355f8c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZRP42598725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7308de93dc893b6b37ac6e00f2c305063053c011467dfa53baf3a09e73886f8c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTAY2510640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c5fec36f1ca69fab0f56eca4a7655515635df0969c562998eb4093851272c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB62540547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5586d7542053e01882978533774e39c4373d0215afbf526f34fbb6685b3607. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFG2565539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08ea0acafbbc17eef8ebbe7223459a4b59a91e527062471f0120f099451f168. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:01Z), 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/QT3FF2552412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9734eae000b0cf88cd2018d012359331672dfaf2c417736193097b05071003. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTVM2464199.