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 0x12cb452b3b9e0f4d096dcf3bec0391114a101a20a0ae04757eef7169565beea9. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aae59211-b2fc-4b9e-8025-5bc46a7d5085.json and https://artists.proofprofile.net/proofs/artist/aae59211-b2fc-4b9e-8025-5bc46a7d5085.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 0x8c65d084cc784467146dc5fe687b0c6ac06beb15d8fce35a40d783deb22976b0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE66N2276868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb364fdd75531fd4a6d241f4dcd6815405dfddf2710ab2070ad0c5280ddad54e. 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/SE66N2276869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1177e0c753b2be8366ebcdad59cda587b3e54ced7fbfcd420919d49de6b7cd94. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNJY2399044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b77c2f55992ee6ec5ea8e35c386a2c8ed8cba4479449acaa7b6bf2ac969241e. 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/QZNJY2399047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ac52316cff7058be25cd33e391dd370635004962096f5665708af1cef4a634. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJY2399045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a9ebcd4e805c4e32e51ea7c7090c69192f1ac553d5d356614353acc8157a38. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJY2399048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a7435c07370358b7380f1f0e4fcfd8ae566ecd40ebe6b5e1921de59d3631f5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNJY2399052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7191fe5c4a0e7385bf695b009a8c56d18faee3a89a68b18328019e9dce03540d. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/SE6XW2523888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0841ae8fb42bff477ab8b3fbb54517497a2b35570f37571b4921e4c0ef8bb578. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:50Z), 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/SE6XW2523889.