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 0x4e086259b75a6b8a48d9a3d06a268f3df172d046350ecf8dfc2d7679d42eec2c. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/247a260d-0f89-46e8-a066-d921c0c6aa62.json and https://artists.proofprofile.net/proofs/artist/247a260d-0f89-46e8-a066-d921c0c6aa62.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Marcos Portugal: Música Religiosa Publicada no Século XIX
Te Deum in D Major, P 04.08 V2: I. Te Deum laudamus
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 0x0b0c43e5f0fd1f6949f1f7d31ffeb50ae185b9970ecc1a854d4387fec96a2f8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT3IN1900021.
Dom Pedro de Cristo: Esplendor Musical do Mosteiro de Santa Cruz
Marcos Portugal: Missa Grande (Great Mass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a4f9599f9e05f60ae266b750d07fbc46ed7784bf5b8c6c467a74935343341e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU7407591.
Canções Populares Portuguesas / Portuguese Folk Songs / Canciones Populares Portuguesas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f08487cdc2d6d0d124c50477dc6c56bf9bc1c7e5a7636327e48c8f1a5bf0f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU8471234.