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 0x8a112a3383d9ac11a233d7e6d4d63fc76b3eae5ce694010a44c610fd0e0b1a49. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea2a66d4-c440-4c2f-831c-9ba3c5b14276.json and https://artists.proofprofile.net/proofs/artist/ea2a66d4-c440-4c2f-831c-9ba3c5b14276.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tiziu do Araripe e Banda Alecrim de Cascalho
Gennaro, o Tocador (Ao Vivo no Festival Rootstock)
Mundo de Amor (Ao Vivo no Festival Rootstock)
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 0xfa879bcb113f6ed532d05faea1e0e4986b9f2057d0144803cdfa3d400bb3f137. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHZ51918153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e582dd11999819b84f65d0b51010543db70da05732a579eb94959bedc0e290. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHZ51917688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc45ccfc53178d8840a1946041daabe19da3c370bc9c8296ef92511e14bc542. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHZ51919680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa019172f777c7ff4d1ec57253640e18fb526905ede5834ffcb9c39425a3cbf97. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHZ51919778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0639ed55f680a8461117fe2843264488b2533b547168b8e8d99344e2cfe596e9. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/BC0O62320012.