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 0x1c148255d4b399cfeb82fe8413e3bb7163b551214c10d2a3859fd09fc79cb477. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a164c01-f956-4160-b539-411410177358.json and https://artists.proofprofile.net/proofs/artist/7a164c01-f956-4160-b539-411410177358.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 0xd0c2d696577ad3ca043fcdcd70c917e89d95a9baba7e255e27529413f19ba424. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:38:15Z), 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/QM4TX2422366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beb927e721dc4b39aa12e374e2893506e1b12a5ec68517de15ec1b372cd0c45. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:28Z), 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/QM4TX2422367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0196eaae3451739f79b6e2f51b0dd1a4b83a97d40ea8e4506324d1d421566fd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:54:03Z), 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/QM4TX2422370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fdf5abea5f4aee3fdf0a3ac971f50393daffd764508fc970f4bf5a725d081b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM4TX2422372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d8d13192b31ca72ca48bc5a5bcc807490b9d11c1289ec1ef5a617ef63305f9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TX2422373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3337edacf998597daad4c58f671ab8294f5de59e848d29609eee4e8c8d99ec0. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAJI2550168.