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 0x757a1d17235bd049d3068610e25975430a80a3d4aefe1bda7c48c51fe6d33450. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e83b385-1274-4850-bb78-948f95aa9c82.json and https://artists.proofprofile.net/proofs/artist/0e83b385-1274-4850-bb78-948f95aa9c82.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 0x55d01235ced9e61803d7b2534ccdc1e631ec93a38551173acb1f994865e89fd3. 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/DEH742201207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8708a5b4c219fa44ddb77efdfa9190f441dd6821b07e39af01846696d98e0c24. 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/DEH742201208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf221bcbd2d300d96fcf616ca00bbc578de83d140eeebb5ac666eb549701ca5ea. 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/DEH742201214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8402415b7be483f712eeaf2edd033acb9d7b7b0030700f7fbd358e017db739. 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/QZMHN2326560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134538d0f60315e1d1106b8545a409d8bc3683cfba1cea25223dfa5a7f534b81. 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/ITA061302334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78b82b797dc8dfb5f8c2dc14fb498c6a4a195193c5a883043ce0a8e3da3ec5e. 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/GBKQU2294650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84cd62c17112cacbba24cc147b068276046ccb5476fbf8ef920701fbaeab770. 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/QZS632453829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa781e364232d68f4a65300b5d1ec359a660a46bfd000c1327e3f71a158bafb62. 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/ITI952300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c5ea1847dbf2a605d5582eea63ac55954f3100c77bd68ef7843185915873fc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2370179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f0d317103a16b840d459c0d52665fd06aeefcbea8601e9af235082f3b30ecd. 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/GBKQU2370181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9cf1f8a7bca012d401612a0ec99814667b9d534621668af46166b63c37155c. 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/GBKQU2370182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1fccf2d3955c4768c628ca6dd6102b41c61fe5d0a287b7d036d42cef742f98. 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/ITI952200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026b85d150356eea38681d3e28384f48e32938a7fa8491b8471b801d5a323df5. 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/ITI952200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2780cfe34a63253a6a84f74b8a129457b611dd21c0af6d3d7d0689b66393598. 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/GBLV62028749.