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 0x5e11345e9003dda8359a1647995da54157779a74507ea60c04ed83f12fe660ec. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78ea5b39-f65a-4a54-927d-b7db5844ac8f.json and https://artists.proofprofile.net/proofs/artist/78ea5b39-f65a-4a54-927d-b7db5844ac8f.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 0x8d04a0168cc53eb77bb8575fa840e7f9f5eeaf3cc2b28ef79fbd81adc8ab6b5f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6N22054627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e1303bce72f7aa26a366b9e3b2c93655b0626aa587a8778cc2c44012991a8e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:39:58Z), 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/QMFME2164055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c04ec4ed40e6bdde747af67e90b55969c7b131733535cc1cb2bfb385e8d40b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:42:51Z), 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/QMFME2164056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9477c85d6d868f711d7b65918fc07dadc4296f74ed30e4655f0335262ca0f7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMFME2164058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6c46d9c2fe5a64e238dc3e4d2befa922efd874e09f571cc4c97a52595075a1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:22:58Z), 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/QMFME2164060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93c10c8f97290b7734e4aeb06c2bebd4408054b4ef910cf4b3853fd50ad4528. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACY1714703.