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 0xab20e5b4a925172d93675b38cf89f2157f0484794eb88c732aa54df798fe432f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d897dbcc-7891-486f-a723-2ffd38aab268.json and https://artists.proofprofile.net/proofs/artist/d897dbcc-7891-486f-a723-2ffd38aab268.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0a77c20dd1a3ba04a9e56bacdaa7f2f22e1af875d964319a7771e053076d0337. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:59:02Z), 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/BKLK12400003.
What's the Use / Cartão De Visita (Ao Vivo) [Medley]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3528381eb1ea065c17cc9ee81e99acfff9bbf0746925f00627e8009fe1ccd9b0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAID2424494.
Cachimbo da Paz / Valerie (Ao Vivo) [Medley]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef8bd756a54c370ed2d3c9db0fc73c69a02caf22535ab3a93174aaa4ad8d6d8. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAID2424503.
Pocaonda Medley #1 Clint Eastwood + Zóio De Lula
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f957249843c702d58ff61bdef180451b9191b03f6eed24f8ef157e69a1dd26a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BKZPJ2400201.