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 0x5b9d17f0e0e0aceda9b7e6f5da41bbb38be0a088e42e4349142c6ec30aa130d5. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e125e909-4519-4e71-a368-09f8e371d05b.json and https://artists.proofprofile.net/proofs/artist/e125e909-4519-4e71-a368-09f8e371d05b.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 0x71adbb1fad7e15ee4d122d0c13df11ed563027f31715f4f6130253df6c6f9abb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:14:12Z), 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/AUG1U2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bc8c8e7d856fce6e58e1b385490a45940cd480407e62f295737a5b0902617c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:58:25Z), 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/AUG1U2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ddcf3d25fd5905191fb73e2f697316954d49d052425f2e1d5804b9ee384ef. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:29:04Z), 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/AUG1U2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4e54f0c475103a82ae076da4276e3b11ac6707e819ae5386e4a9e2df345056. 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/AUG1U2500016.