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 0x1c2189c4057b0d00492c34ff63b0202b80d589fc9796f10686c0387d0e17777e. 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/c3a70944-d198-4f81-a5ae-a077698f3f57.json and https://artists.proofprofile.net/proofs/artist/c3a70944-d198-4f81-a5ae-a077698f3f57.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 0x6d0b0be44f29f500ff5224692bdf3e9a9792411497a18311d78759c860855805. 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/QZK6H2373642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351f3b2d4206996e229c5197bd0db83887b331d14c363e4786c1fd9daa15a493. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES72376088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f687d857571a488bec965aeb0e05a09584d0a896df4d7d71044be5b45d82ff9. 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/QZK6J2385772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725f73f758a1dfb09649dac9eac519eee91b3931f83016c6b826c96a1dd24802. 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/QZK6H2373643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840995ea6accb340f4599371ba0070a5fe7ee5f6686db963c2b3d8b5b1ff5f5a. 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/QZK6H2373644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb9127e5663a7308d521cfd172131963348a8218e10ac0d7109f6356538a90b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6H2373645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd53729cd0269dcf913b25e7b4ca10463a064cf0edfdea9fa7a3ba65d29509e0. 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/QZK6H2373646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcff423ef4c731b0cfa7db88258de688c7614558987b16ae3d39f0c0aaa80d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6H2373647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b39201b9c5f7ea7827509efbdc19c1305f861f1ec1cb14b4eb8a1ddc9f975fe. 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/QZK6N2374764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70528fb8224d41c80ad96b69f2ff05da8d9c01bd90d9656b5d00bd8cd8c9cf9. 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/QZK6H2373648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f687d857571a488bec965aeb0e05a09584d0a896df4d7d71044be5b45d82ff9. 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/QZK6J2385772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b39201b9c5f7ea7827509efbdc19c1305f861f1ec1cb14b4eb8a1ddc9f975fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6N2374764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351f3b2d4206996e229c5197bd0db83887b331d14c363e4786c1fd9daa15a493. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES72376088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b39201b9c5f7ea7827509efbdc19c1305f861f1ec1cb14b4eb8a1ddc9f975fe. 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/QZK6N2374764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351f3b2d4206996e229c5197bd0db83887b331d14c363e4786c1fd9daa15a493. 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/QZES72376088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc511634179a29633e09211539e31ede2c3797e6bf64a9e1a09d883cae32a2ce. 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/USHR12243897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e787c6d3c6561dd4565e207a213f69035de1d182733750d997d7cf3ef094dff. 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/QZHN62074384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf678c697774c385cdd45b9809e10f5f4300df31f8e87197132513cf930307c8a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN92066386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefef3570074da2095e306131451891efa537ae986bc7ac560245ebab49079405. 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/QZHN92066387.