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 0xc7429c870ec5c455aeb2067b611d89c8edea1df5ad594ca0c05a4ad5b62f8875. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93b0aea8-ed71-48c1-a421-fd87548ea242.json and https://artists.proofprofile.net/proofs/artist/93b0aea8-ed71-48c1-a421-fd87548ea242.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Herói da Terra: Juscelino O Cancioneiro das Missões
De Mala e Cuia - A Voz Que Relembra Gildo de Freitas
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 0x238574204313488a03d8d74fd83cb70ce25da75aea33199f6ce56f5da29042ea. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:28Z), 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/BROIM0500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5080132d6734161618fad3618a6da605543c4777dd751d8fc9163545a3cbe70b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:04Z), 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/BRUSA0401972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16772e0c19df000d0b30bcc8379549f59bb0fc8a7d07436fce50b165dfbd06dd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NIKIT2200869.