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 0xbff685995707fa853e48aed439cfe450a3288860fffb4583c2b02fb96b6bb3c2. 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/83fdb458-8e80-4646-84ef-f9928920a903.json and https://artists.proofprofile.net/proofs/artist/83fdb458-8e80-4646-84ef-f9928920a903.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 0x30d7fe70ce6cfdc6974881c384739c6a10b7c1b962c0cb48c60877eaa9f5ef2a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMX2310132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c240963b844723628f582b714f5f1a3f7ae0b0ecbb1c1e26d35812246efdcd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZPYN2381801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9387a871df6252ec05c2019645947f2d50e00cf61d05228e0c7f158a8ec8bc61. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZW9K2366812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac64cf3e8df3f019afbe84d1f52befb687e975d64d9aa34fa55c9f42dc7abcc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6P42483486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74564c84574ad2bbc54e5e6c70e754552136b2228451490be10cec5a792beeac. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:36:20Z), 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/QZW9K2424811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6026edaed3ca3c839d7ed198aec4f8f4e199c1bb8ab88a7c37c190c17957f9eb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:01Z), 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/QZNJX2579796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945e7c927d392c1d309afd4ec130d785fe597c870e3c8a0bb7cf9af0eea76fa4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJY2511640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321e308344ad179abf5d90ab4461c0afa167a52eadaf5258015b129b027cd635. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:57:16Z), 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/QZNJZ2587983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d593984f172fe28453c00853c47cc44856d8b387c49e9e0a94d227f291de0cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTPX2351022.