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 0xd0266585c505621ea1d8a9cfb3e1c31225ae94685fb0ed24280df0e65db9c24b. 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/f11c4721-5630-4ab3-9b0f-fc3387137a90.json and https://artists.proofprofile.net/proofs/artist/f11c4721-5630-4ab3-9b0f-fc3387137a90.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 0xf9a911548fa5181f494d7ce5ceadec8478adee34e1c96d56683de0429e3bee71. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7819500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2fe8e18bee470c69ed3c7e04ebe02861f3342ba05caa4b4b90d723c5df9609. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/CH7819500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22233a0305248a4675d7f5f8d1c8e770b82001b84c6db6e10e2b6f983467ea83. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CH7819500317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf024476382de3fc511f4186ae3c8bc99e130761874331d9935967b085fafc9f7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:12Z), 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/CH7819500344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb098f6693ce5734ae536b2f0bca536dab4ff0cb39012350928515b510fa6ddd3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:44:43Z), 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/CH7819577567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc833692e7c1ef8ed7f1e4cd4a33a5687296819f8cbe4fc34f22fabc127cfb740. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:37:53Z), 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/QZGLM2572773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a806638b4f66e863a383310bb170d956e538bb00d4d31ae774f009d566aad3a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:24Z), 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/CH7812545821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e2508da5768497985a976d489629e937453e5aaf3f0105376671c4cf3f8c87. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2536105.