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 0xfa4a9118b92b48094e9d7d381406bd84aa585a45c416d2779423dc2f47f87257. 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/e5342c50-32fb-4b59-80b8-a8bccce6012b.json and https://artists.proofprofile.net/proofs/artist/e5342c50-32fb-4b59-80b8-a8bccce6012b.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 0x1961f6824803c0205b1b506d0b20a2042259e6f502a298e377b86b3fe9c15cc2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:00Z), 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/UK6821411925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d5d6061d7d802ae2bcb410536471cd97bba91a760e8a8dfae0791cf3a84fc9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:30Z), 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/UK6821411926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419fe3219b99b458c8c29fe05f09cd691cbccc2ab9d239a995bdf87099c933a6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UK6821411928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4099cc4af691c49694a7f0cdda97da4337975ba1e5a629fb6ee933ebbf6f541. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UK6821411929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a92d40f51f074d76498c85eb44c8af9f42718467473105189afa0f465f15a6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UK6821411931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43b3792c04542541d46a2839dfda143945e349557ed8dfa0221cedc24a3da79. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/UK6821411933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04e9ea43ee3b1ca320e9bfd1237b4f9c3f51dea6bb07b389a9bafaec1a80d17. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:40Z), 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/UK6821411934.