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 0x6b795420d10de0925224374275a6b360a63e49e9db745ff24fc153d14fc2ac7b. 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/a149dec4-9447-4b18-afb6-70ba7794769d.json and https://artists.proofprofile.net/proofs/artist/a149dec4-9447-4b18-afb6-70ba7794769d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Quem Canta Seus Males Espanta (Cantos Da Terra, Amor, Trabalho E Homenagem)
Cartas a Portugal (Água Mole Em Pedra Dura...)
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 0xad7a0e27226a62cfe82b94c85ad5b58e363832ea518d94601b670dbde24f3c34. 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/PTCN10000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7265456c3bb90f90cae6033b30cfe52583600a83991cd72e7c51ae00e47291. 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/PTOV11300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb42246a666366399535604e72a91530492820dea97a3675d2bfaa076a1f7b7d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:57:54Z), 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/PTOV11300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6c85ace627c3de940755681c85487e7780a30305f7dc96114381c7b60eaa95. 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/PTOV11300066.