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 0x563327b5a044582fb3d93192f97bd1f21d25bba4ec28d8b2640c7ca7e27ec50f. 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/a1a73062-80c9-4390-8f59-5cd6fdd05a17.json and https://artists.proofprofile.net/proofs/artist/a1a73062-80c9-4390-8f59-5cd6fdd05a17.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 0xb506444047b79b29f4f247f5f67266f7c4f3c02cfadbd619da286f4aea36cda6. 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/QZNWW2054224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd89fc0d493b634386bbeab523c64369dd935ae1f6ad025e40c455709dc619f. 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/QZTB22269119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774e9aeebae890b04b330583dffd539f0d090d5c542b66f57f3d3549c3b018be. 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/QZHN92424669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc35ed6772fad4e85bc402c5774c8af73a34e15e33d50143eafce4354149e63. 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/QZNWW2130094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ac08cf9ce206b88484ee9a1e9f77c6baadcd3388e591f4e64f0874c3256af. 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/QZFZ62151654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30000f9645bd144fd6106a33e9574d3e097fc91cfe89b8d212fd88de3238ba7a. 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/TCAFH2042755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee873023b31387c077a906657e92cc0bdee1dce34946e36f343ef25f1b7f004a. 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/TCAFC2024059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa9055e42492bd0d16978e9b2a85e1e39e66cd3094b40ec35752d955214acd3. 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/QZK6Q2073450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7219fa85ceec20cbe45fbe5b69cf66c9e919626075545a8df1fcaffcd8c5b56. 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/QZK6P2032580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd5e96e60ecbb762e39294cc989757cc28e32efc36c332a4406d108c82d70f6. 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/QZK6N2087313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5957bca386be88831e01f7280a3c9c7ff6dff30b9ad382f77d74c903794e0f. 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/QZMER2073475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa390aa97b556984e79c10816db0b960e8b46a2c3db46b15cfaf8dbcbbce6f5ed. 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/QM6MZ2134026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817f2dffbf4428321335db83af5e5cd6f03f38762931305b71d509696f176b6f. 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/QMFME2141523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0e0d3153c2d7666750b8da8964f171a0b6e235a1e8971b04fb256c8f3d78f1. 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/QM6MZ2180374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022ed5a89b8d8217ee870a7a5c587c48d034d313086309a58906c3bddcb6815f. 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/QM4TX2108301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2f6217f522af624bcfcfbfbec5f7442041587c5e366cc30fd5808378ee829. 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/QZMEP2053448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc4896ada1f78d4708bf8b17c374db454c5dc3a36670ea64fe81a075975ebbd. 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/QZFZ22015742.