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 0x6bb64f04af8738bcff42d2b3342f4aa7e306f9e1126b3ef985a03eea402d17b8. 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/03936b72-2e03-4a84-8444-65cceb822418.json and https://artists.proofprofile.net/proofs/artist/03936b72-2e03-4a84-8444-65cceb822418.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 0xf4bbaf74effaab708d42e709f72c266089d9d3afb29f8395b56508d110b1f681. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNWZ2327470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd6968ab12a898110b74a1109d91d56ab52f579fb3a5574bae8e79392cb4ed9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFM2552793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96b66e3bb3cf296a614f62215b8a1d3dc0d5ff977bcb06ea60d28ab8a4e5547. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL1AP2051295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68fd5aa8001061a81c196e4028dbda1edb290fc332b15063e2e38a74642eb8c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFJ2142393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1b30c60b383214a6d44ad1bbad52e27057aac235dfafabf1701b4ba81e5fe3. 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/TCAFJ2142416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d33bfa5ac0ff82e765a972b307be07915b86e55b6e54e8bf6de9f6670fe959e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFJ2142459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fd749b15bd03543bd76b6c04d1e736902df21c6c67e6c8e1a850d8c7ee5282. 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/TCAFJ2142479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30515ec32c470cadb7b6bcc4ef3cc0eb72f5837ef05c80a167578e312af2c44b. 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/TCAFJ2142482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6f78f0fa9112c0efbb66967d1e549d2194032d8cc259055b0879867af4ee5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFJ2142494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056952b282e7e30898377242966f18be476650b8981e15ddd4b90136fb116427. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2266515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ceac9f0937a3cca86545fcfeb859cdc0623e8664fef96225a26774818e8fe. 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/QZRP52187820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef77882b654d49904ae65f686b527fa7299ae4093747d109f0e63a7f31ce5e47. 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/QZK6H2266516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168015eec6b0b1e174a0335b8b7442827250659fa6029772737c465ca55aee5e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2266517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866bbef9be5cbe617c36d60ce8f547884968704b8343cb2cf182440e483ff51b. 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/QZK6H2266518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa33cf8faac4243b7da13ea4d048ae8b1d4a0079852e2be70b8c21c9171221b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6H2266519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fb95dff79275ebca0af246b6e11ca7d7dd267e3e28cef2635a1913c2ef0ec9. 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/QZK6H2266520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca4e1c178d5f8c93a795509d7fc6658c8a47f92e77512192b10edf472acc5b3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2266521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe695f5ddaa939dbeb6cb3ad56a607fe27ba6c857639b0eb22bbaea1e7514e62b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6H2266522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207a3ddea08d8d5ff325fb5fad613cf60c4b53595f51550c91641699bb3ab2c7. 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/QZK6H2266523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742b1ad6c64d2e5956811c01f0cda34c6efea0eeca7e7487654bb75035214ec5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2266524.