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 0x7770c70061101eee1e72c159a24ddc1641d4b38b3d9f85e3df5f883e7ded8be8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f69e35b0-9c10-4b50-929c-5405103d201c.json and https://artists.proofprofile.net/proofs/artist/f69e35b0-9c10-4b50-929c-5405103d201c.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 0x4841df8b8dd6ced46a715fa383c8b8d85b3b355b5ca767791dd40a44332906a2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEZC62374149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4b46a8d2454aecce446318dc149e7d1293929dd04442708999a873a51294ae. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEZC62377623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f5cf4005c1182447844ab10331e38c00b47895aa1851e3fda2756a6601ac18. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZC62380404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9cbeab9b01b056f51dbddbd1afdea5290ca2e00937656f9f05c85d0177acab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:42:45Z), 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/DGA0H2412792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1d4484f06c99e9df4d18cc9a687a3014f63dadde5aad797df27572689268e7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:18Z), 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/TCAIW2466481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a14728c3c04feb4281c644704fab584d6dc57cf2945cf365f35988500de4cb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:18:28Z), 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/TCAIW2466489.