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 0xb6f960c1a93199153723b3d5f3a61f166e09450ebdabd341b4a5004ca893edba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a5017c0-a858-4f9d-9086-f8e19b39dc72.json and https://artists.proofprofile.net/proofs/artist/9a5017c0-a858-4f9d-9086-f8e19b39dc72.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 0x4f48fc5f9321d3b52f567657ec6167b3431c01740b6a884885b0a711aedd0b6d. 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/QZDA72239349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf9cec4b3a0d5839dbb1b4fe471258056f06ed008749fbc48d37ece93fadef5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA72239350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9cbbfdb6b5609b4f73a69524b87bfeb1522dd2015c3a0f3756b2735db9c2c2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA72239352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e63c3782c5e20a5bf9dce5c590241afc268604c2866994988c83c523bb1e1f9. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZDA72239353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6076e3f9241e945798ca7936a3ec0f228cc0e0f93909e80dc493b014ff386c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:39Z), 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/QZDA72238716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc28ab4c31e7620be39f20f2165b064b217f4a6e5b318d64dc893cd4807c9b. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZFZ62306135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1386613efaf350cebb5583107eddbffddab918471d6597b3622c9f22043419. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFZ62306136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf443b9c0dce0f8f7a517cd7cec413169a9641c733949bac4c39fc3fea8018d4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:24Z), 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/QZFZ62306138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9017e32289960038baeb822ae9d53fa67ff3e217f439525556ccd839b0f57f0b. 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/QZTB42356844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9110c72de2db0871986ce2882849843db2997d8fb61a0a186f93b0329f38c59c. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:06:22Z), 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/QZK6P2418383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cda7882fe371c8c598c8b17bd10e0b416002ec384544e83c65d79bebd40629. 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/QZTB62471675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9370f29c19cffe824328cf70c8fa56e610ef2559be4e11e1ad9475e86e4291. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZDA72524014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e9d8d834ad06b24b10e92539648715bfc20674458dcd1d282294c4309ef201. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:34:53Z), 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/QZDA42585331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450f18dda75be35561bfa20dcbd8363fe02eed59ee41ccc15d94ec3759efea5a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWW2541509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ef816e1ec839d9674523ae673a122223b9ae0150d6c449b6e650544c2ec953. 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/QZTAW2501023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1422bb705f173dca210fcea7b3f34fdc9435e85ef161d077563f23fb762871. 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/QT3F22522029.