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 0xad9338b74039f7d5768265c968409ad798edd7a67df1140920f54da433115c0e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7859c637-2630-43a7-b5e8-4fdd656362f1.json and https://artists.proofprofile.net/proofs/artist/7859c637-2630-43a7-b5e8-4fdd656362f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Roberto Collection / Viver Sozinho (Dejame Solo)
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 0x844e94772a91783bac65d0eb9f1fe1e45ab9f238ccb93c9fb2543216c18d0ee2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRBMG7800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3204a2032d14c85000543d6564d90462c1bc05f2cea380daf58dc664b66d8e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BRBMG7800217.
Esta Tarde Vi Chover (Esta Tarde Vi Llover) / Desculpas / Renato Collection
Ricardo Braga Interpreta Roberto e Erasmo Carlos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c54aba35c2a91306663d3a1c47c15394c696d283d6d1baea5935e52563eeeb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRBMG7900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b97b6cd3d4803e2806bb0269cf49b9e381d28317bd10c86e2de687b4843e010. 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/BRBMG8000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24d61c55bc2529baf6362450e5733062627e40ae61796eb7b1773743e3975d8. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/BRMDM0300191.
Homenaje a Legendario Roberto Carlos (Versão em Espanhol)