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 0xa2eded9f6e01ca8fd56e9f2e5d3fd9d58d8309a9b00c7819a0a4c5fe53b87889. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/174161fe-61f6-4c08-86ba-8271f70be52e.json and https://artists.proofprofile.net/proofs/artist/174161fe-61f6-4c08-86ba-8271f70be52e.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 0xd75173fd5c2cd491b7b69260a73c1b4c1654d6261b5887499b7d12cfd7a98816. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGLS2071926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f425d7a15dfebb1215a7d19fa8e3183e36db4dc018a0d172562bb42118bbec. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BR8F71300011.
Coqueiro da Ilha Grande / Vou Embora de Abraão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b33dd306fe9f191634fe73d3561e2d907a7c6b1acea36fa0200d4747d9ee34c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/BRK522200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fa519e8b2fce545190864cdf35fa2941684c44bfa6bf11370d2733d9d9e247. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BRK522300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36536c8c6cd32c9aba68d2a9e002b8bbbbaa69820ff2e12135debe0aa8219f91. 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/BRK522300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d1de4668e92eb0f7ace179e72118ea92315221b83fc2c00ce556a83d884e78. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJV2409022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616d04c9896bdc45f30a665040f661d293a259f0645bbee196e9f9c4f5fb14b1. 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/QZTPX2467707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719fb2390690c3d1564b04254f1d7f56b2c65c90bd5e126446b21271bb9da5c6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNJX2585275.