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 0x8bbc56526e5a41c1e26345b7b2e703f6f7707fb74b92732326d0d8f246d9ca61. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db8c40d0-f3da-441c-b1b0-44fa219de614.json and https://artists.proofprofile.net/proofs/artist/db8c40d0-f3da-441c-b1b0-44fa219de614.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Diamonds (An Orchestral Tribute to the Beatles)
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 0xb9ea22df18a46cf8fed1a0c1573dab52a1d0d9694d597a79b960e6b9baeb7b29. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:23:08Z), 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/DEHI91000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfb0532467088a2dfbce56d0ac3e1f008d32c8fb4426610e6e50517af0c4fa1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:12:48Z), 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/DEHI91000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad584ff90cdd8533c8f44f3739878d7f27fbeaf138fd1f3b3d60b9dab188185. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/DEHI91000163.