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 0xf86aa13b5648b786963ce67c58f2a7a76ddb683c8aa771e6798113a54437fae2. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20a52c02-f6b3-432e-a337-e95fe66130e7.json and https://artists.proofprofile.net/proofs/artist/20a52c02-f6b3-432e-a337-e95fe66130e7.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 0xd3de9d0993d8b1f3a77f8caae699fc98c223bc7642dd9f29faa4fb7eb4308e20. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:02:19Z), 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/QZES62566323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1f930131f4ae9e94811ebf929eb8eabff0c9f33e9c42821e58f24f378eb4b8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:33:36Z), 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/QZES62520159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e412b4a0c60c52e84aba1a9618bff5a84bb96d5e82b6f986f56fc2c8c631489. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:44Z), 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/QZWFK2592384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ad4ad52c04630c2cd089094e94317c2ae8a276bb8f2ccc0da580f39f60b73d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFS2531637.