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 0x6d06f840d755b1806dccc4ed49be49a200d9d93bfae865a80f3fad4039b3fb0e. 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/fba161ec-cf87-4cbb-8af6-3d8ec37a01d6.json and https://artists.proofprofile.net/proofs/artist/fba161ec-cf87-4cbb-8af6-3d8ec37a01d6.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 0xe90949bb3466ced98b69e1d511444013ba1d51267b09219aa0c105f1b8ca8ac3. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FILKA8000332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d5173e79d0820d09db565df809a5c9fa3da0a0b1033c1872286c34bd60c062. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/FILKA8000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200d4905c76cbd88bd58ebaf527962cf14dd0396eeaa1317902cc5e8849a3dbe. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FILKA8000338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa6933bbf27f5ea39a5f0abba52751c1a32a775373d520364065c29af64808a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FILKA8000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1aa38467e87b6c7df982899d10749487095ac7303286be9c6fbb8c4a4bf522. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:55Z), 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/FILKA8000343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbda7c6e996f136e21c6475330be5d34ce8ed77c54a4f3ce1b9593727c96a65. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FILKA8100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40a7c48e0be25af2af237ec1bf33a341edce50acb50e449fda25e443c6d166c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FITTS1800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acfae1a22d631a006292c83bd987bd793b79386c1046406602879fa0dfcc57a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FITTS1800168.