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 0x722c3ec25e1ced677fb193e8d1057e05d493e204acedf4431684b8e53bbae7c2. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f002e18d-e5af-40c4-be4e-77d1dda89360.json and https://artists.proofprofile.net/proofs/artist/f002e18d-e5af-40c4-be4e-77d1dda89360.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 0x1a477b60b141f4923b0c304c967cbcd82991628bc19d75311d8e345cefdeca75. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:50Z), 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/TRBCM1806844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe31ca62efba6b30ab31b15970ea7080927e885bed7ffd007633d0d8f56e92b3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TRBCM1806846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25515ceadc1040c93d2297331f741af35e1a63170209cbd2b1190396f021d7f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:50Z), 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/TRBCM1806848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609373a076620a7254003721ab22a6eda0c5e6990bc6b3eebf2b3ed27ce04e6c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:20Z), 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/TRBCM1806849.