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 0xd041da20c391f478ab60667f0ed8d4291436f349c54541bf352f1f3b48559aa7. 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/53b68ec9-f553-4684-90e3-b2c9e08ea9a3.json and https://artists.proofprofile.net/proofs/artist/53b68ec9-f553-4684-90e3-b2c9e08ea9a3.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 0xe1df4bab57566187767951b103f89b7d9129142ce9cb0f67a25184bcd9754695. 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/QM42K2020842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec9166fa1cfa1d841242cd53cbdbe3f2e0ea3b6afa7f515ab805addc06c5a21. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:57Z), 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/QZS662114149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f6382b5c33c160b22bffa34a5c0bf0362fe6a18bd574fb02a0f851e0f8a389. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:06:57Z), 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/QZS642169740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b507ae8c02c0d8a819084c354de2972f888046d0f023e33330375227c33c01. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZS672199404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c12cf580e7a979bc747c79922716a8c74d657812da82c7ee4375c8ec37203fd. 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/QZS662103730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5864d59b648e816b8edd3af5434e01cc8628c649bfd13a3fc6e891972c40f3. 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/QZS632305340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba39c2168298bfb9f110bba899402a578461faa9f6ce4029bf67813af17cbf. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZMHM2302931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dae01ada0c4e3af5de94aabe7581c646fd7ff20f5153cae9a60d85a3d3192c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:24Z), 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/QM6MZ2578246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb28300ce9a440790d47813e84fc32518807ff9b125d5b74d3118a4bd1edbb1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QM6MZ2578247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a3046a92edea7b590b3f5be9b32fadcd254e22661c56096c2dac12752e73a1. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QM6MZ2578248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3374994a1ab5521585f277eca8c063aa8c8385ebdc83a85683c40b05dbbc6c25. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QM6MZ2578249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49388723dad265aa4235ca263fc6868872b77742e83c454c8730292fd194d0. 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/QM6MZ2578250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f637cb228cb1ab5609d7e796799a9ee2bc623d4cc364807d9368aa064c2692. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:23:53Z), 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/QMFME2596391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80b935f0baab44fc70ce7bfb17f44b6fd5fa658c837afbe76c6f0901ca8582b. 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/UKEX32500309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb29a0b01270f3ba61d1d68a9960f1f8e917b0aec0bc793b87757a4cb78aa0b. 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/UKEX32500319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a815ef219f573bb7a4cd69706ae9f3344b996932cb712fe7ac3e77ce5eaa44. 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/UKEX32500324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf023331928acf84c4fd1a89516002993e81aa33386dbacf308af93e52bdb41ab. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWS2230966.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfebe69963c6e621797ae2d2e738e772f05640887007ee5ac8b8c3429d33b7e8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZFZ22331725.