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 0x5b93ecc47771485ba09ce89a9d20e463ef3fa0851598a3b383ef1e6b74edd089. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9cf5876-9897-4b0d-918e-3b2ed5f1f7e0.json and https://artists.proofprofile.net/proofs/artist/d9cf5876-9897-4b0d-918e-3b2ed5f1f7e0.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 0x00c1cb3005af86f22669cf2e98fcc0a930b0e45ac28691ba1ebb6c74e1b8ea91. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:08Z), 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/QZFYX2218233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b37d563e35fa97f172572c04a42c690179dd80c3ff8e5b3ba892a8217fd3c. 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/QZFZ22209666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf731e95e59dc7498faeaf06ff99f949874359c613285b9c606b8d2b6482822e3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWR2191642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50a67b7614095ba9a5246fb00d779333769caadf76c3f90703d37426d44d541. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:28Z), 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/QZNWR2191646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66b97b838c35fe7d26e92b64708e8f050b7a1f2141c938db336fc40667681d7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:35:56Z), 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/QZFYY2512051.