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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e9640551b589e567fa642dba66c99e0aa98f71f6baf61895d1ec1177c78840. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c125c314-dd27-41b2-af16-b9f1fd92ca75.json and https://artists.proofprofile.net/proofs/artist/c125c314-dd27-41b2-af16-b9f1fd92ca75.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67c74b54225bc892d47019a151527c436a816908efe7671bdfadb86b4adf51d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9L2472142 — a six-check JSON result.
Papos Picantes 1.0 : Delicia / Vai Pénelope / Sò Peteco / Roça / Surra de Tcheca / Surra Toma / Pula Pula / Borboleta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d84700590fe95c254d0eb2aff8c2a25945d2b02afe60796796fd75aaa4f6b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2507853 — a six-check JSON result.
Bloquinho Cinico 3.0 - Bota Xerequinha pra Suar / 50 Reais / Só Quero Bunda Só Quero Theca / Kika em Cima do Maloka / Prende Solta / Toma Piroca / Passa Essa Pepeka
Bloquinho Naufragação: Toma na Tcheka Piranha / Piroca Entrando / Empurra Empurra / Senta Com a Xerequinha / Toma Toda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa55529d7b47f171142c1e9f167b3438f45cf20580262079c114e746df2e3d6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2542069 — a six-check JSON result.