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 0xdd2568f920474222db5eabae65412bcaa7c6f88f1ca7e686be0316b125a68530. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac5d8e56-b190-483b-a218-0c299df5bcee.json and https://artists.proofprofile.net/proofs/artist/ac5d8e56-b190-483b-a218-0c299df5bcee.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 0x0e1c99b778eee5b5c17027939180f797f2c87be0d93166b61aaf529ffcad6d53. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USL4R2490235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c32fc19156975150773a0b6a61ad7686541e3359062c3c237518f30c49ea61. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USL4R2490237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2914adcb559d3ac5827f6847984f411b4ff3fda73d305b93d8fcf82e6a29b77. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:12:17Z), 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/USL4R2490238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b60d2f8f7d8ac5cccff443642827c13930d32599cf114f85c8598014db35496. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:32Z), 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/USL4R2490239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b59325ab9bf799f94d6be1612e3e0124145877ced2ff4d9f4acf751037ba9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTB42334417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea26b661ef3791144537346594ee0aad212ba38923e3d8c88e0e7eae82404fd6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:40Z), 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/QZTB42334418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85471daeba244ff809637a79d258989cce855775d9ab2e0efb97c436a485db91. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEV2513379.