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 0xa334796a942ad774ae67a98422310adc7c023cf2a8799df0a42ffe765e15a53f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/752b4825-be11-4f80-b006-2d81862f4216.json and https://artists.proofprofile.net/proofs/artist/752b4825-be11-4f80-b006-2d81862f4216.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 0x9f0745081e9b37109900c0ea877e91d05bd52fbbdee0e9b2c7ce60c470510a70. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:46Z), 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/QZHN42542526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a064ddcd833385a78a93cb3562034daac96ff3658e96882e5a08f4adb4c5c0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN42542527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8756ddfd99d36376668dcaa3af3db0255ea7c0e81b60bdb832ed065ea2b95a5b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:18:11Z), 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/QZHN42542528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8b0f0f7bfcba9b247e3bd5d21706ef4f23f5ee9f191f409dabfbb21c28aaf9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN42542529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667b22f780d6cef9618d13129ae96e1b3d3d678578d2aa9e259d86e166f70954. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:03Z), 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/QZHN42542530.