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 0x04f2028a2e59f5fcc35eea717ace2daeed293647ae9c8fa415fad6946791038b. 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/1255610e-b8cb-4da9-9b05-45520a552b77.json and https://artists.proofprofile.net/proofs/artist/1255610e-b8cb-4da9-9b05-45520a552b77.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 0x5ca863875ed58052edb99d3a2a40eec9aadd76e6da2ac911fe05b37620593dc0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZC62451807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e309207b660f51c4f03d97457904b64ab638d4c20d2321de3321a2e3608607. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:07:42Z), 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/DEZC62451808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f89ee37868f1d33071a8f7489b10da7b60a44a23bf1c49f642b47e55beb658. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:42:54Z), 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/DEZC62451809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf635631a7cca62ba4d44f3d8214fe9dea7385d9bab1a26e76bfa800e04d4b892. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:07:41Z), 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/DEZC62451811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee66011ca6ba121cd061351ac4e45f4677fdd5f08c36fb81a285229ccb19c86. 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/CH7812368537.