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 0x1d98287587c926f5245e962577f605506f0afcdaf3d2a4959597c717511eb36a. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4cbf3b4-3f1f-45e7-b024-56dce5880dfc.json and https://artists.proofprofile.net/proofs/artist/a4cbf3b4-3f1f-45e7-b024-56dce5880dfc.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 0xf892cdd37bddd5fc3644d41fda45745a03a5b682a5f4a810b56a800a68c95290. 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/QZNJW2522913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e1f0bb693e4616bfc43659c2ba9d684d508f7fc2529958d6f702d6fd04ef1c. 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/QZNJW2522914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4590b499fdb00cd97fa47d852127d7a71c08e3687faf2ba32eec6b364c00e9e2. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZNJW2522915.
O Cangaço Tá Diferente / Juízo na Cabeça
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8976604e5c7bf44458d44e0fc3a610b788fe21ffe312380bc2f63eb8b3928f. 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/QZNJW2522916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4f3d343927c53cc4f291abebbd4e1f71549a4dfb29f486821361a7f5dc90e5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNJW2522917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c25e92828e4d5b6bfdaa72f680a5038dcd9b95629624e8c221569d2e959ea. 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/QZNJW2522918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910eeb586fb779424b78afc8ebb75302a4c9a5e7d9619a09dd4a307a78c271d4. 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/QZNJW2522919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa515c5b22ddc53113aea979c7ccd2501fbb27a6bcaf97020bbeb4a2bcd0d00e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:20Z), 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/QZNJW2522920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe182abbae58c730f709a824bf1b3c3596559a2760e6a23c909e380e85136c111. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNJW2522924.