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 0x583e6260b6eabe02ec1cea6a631853479cc79bca71f8cd482d75a84d3e9a7b89. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e8c18ba-705f-4c4a-84e3-1b83019e68b1.json and https://artists.proofprofile.net/proofs/artist/6e8c18ba-705f-4c4a-84e3-1b83019e68b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vem Cá Ó Primo (O Meu Nome É Leonel Nunes)
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 0x88a6d7a4afa6e57857ce31510e16c3ebff9c8a5529d25dd0e0fb561a2c24d2c7. 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/PT2EO9200545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198c37385f80309d98a61ddaa1a40782ab9f3511f06d40d51cf6119281f4404a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PT2EO9200550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868f4329aeeff651e27866f4636a20514c7416e8a0b857a4d00f4f10a7cd37c4. 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/PT2EO9501040.
Ele Ficou Na Da Mãe (Diz Que Lhe Dói A Cabeça)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a31d76d01b7298d4bb3359dd7b26747e47db2499c7e2b915dc041de0542b7ec. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:17:19Z), 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/PTES11302308.