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 0xec77c5fdb088764e57e242cb794a3dabc0ac0a944c270214b13952544daaf51b. 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/f1c43b6e-d69b-4a02-85e2-0379da0f6708.json and https://artists.proofprofile.net/proofs/artist/f1c43b6e-d69b-4a02-85e2-0379da0f6708.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 0x85219b9e97dd93863c3ecb53bbe844d53eaabaf727e38e8a622e9e455e45a797. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:10:10Z), 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/BRT2D1300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fb0b3613a9eb999737f4439d5b0c42134c52a625ac22fdebb22a947308c57f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRT2D1300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c565280df171864e31de84bb85e802380e72c37e582c8a9dd6930658e808c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BRT2D1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf144f54c38debf05a2b50468b9d8b2667491323a19f47223e93721b69bc637bd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BRT2D2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990e4678e041f1c7d80d98f3a1ae2dfdafcaa1f84b61d667e6ad381ff450ee08. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:28Z), 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/BRT2D1900004.
Chegou a hora da fogueira / Pula Fogueira / Cai, Cai, Balão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5057a882f0465ccf276988c5b3b08cb9bb4bcf5cf7c82aae06fae7da71f68c93. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:00Z), 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/BRT2D2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e15a483284553a3f0991a1c79c3a15b8d5bb468b3c7156cee186bc3e877c465. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BRT2D2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cdbe1dae7b463b4056353da2474c3375d818c1b35b5f21bd55c74b10a203fd. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:00:02Z), 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/BRT2D2500054.