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 0x3e719ac9c3e1ef4c372adb734f7e0f3bea325bcc231a15202b50941ab169e2bd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97be7e5a-b3d9-4bba-863c-46f498875547.json and https://artists.proofprofile.net/proofs/artist/97be7e5a-b3d9-4bba-863c-46f498875547.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 0xf2b83fe158e8744966a1ada6e2dca8cfa8fac8eabf34df01cd51582e2ff57ffc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:09Z), 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/BRGRV0401952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd3ed332846be4b2bc16f9c0acff0ecc9ad65c4525ae71699f29ef75222e642. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:51Z), 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/BRGRV1402606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09591da55b9677c75222c36723de0d580479ce75050e45f8ced7d16e595585d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRGRV1402608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29dea49a8066d3511a7643164c5a1ce4bbd860963d5552ca576a2eae1169324. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRGRV1402616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce4450b76e4c19ff1f4b9bbdd8042aad78be0a646aedb23414389b93e7732c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRGRV1402618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f8cf48de2e3d404b27216931b71ce3239bc672c6fb543d30f9f90609c48f87. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZEQU2064449.
Banda Metade, Vol. 7 (Ao Vivo no Clube Português Recife, PE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde55d997be72fc26d1314c56b277bb38a7282f0430b1d039816a5dc0d20917e3. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZEQU2064475.
Banda Metade, Vol. 13 (Ao Vivo no Clube Português do Recife, PE)