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 0xaa6f82131e7c6296e9c6fc4938e70aa74ba8de945faa1dbf5f915fb194f8ecfe. Chain 2 (Bitcoin): anchored in block 953976 (2026-06-16T16:55:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b921b7b-47c2-4f3a-a030-5e4d0a4f3d0a.json and https://artists.proofprofile.net/proofs/artist/2b921b7b-47c2-4f3a-a030-5e4d0a4f3d0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Érase Una Vez (Canciones de Películas Infantiles)
Bibidi - Bobidi - Bu (De "La Cenicienta" / "Cinderella")
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 0xccc8d75e41bf9b081b940644de6b62cc1a2a4ebe6f6b10bed472f151bc66f9db. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:32Z), 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/ES7931200512.
Las Campanas de Notre Dame (De "El Jorobado de Notre Dame" / "The Hunchback Of Notre Dame")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe153514d00da1ef417b4c178ebcdb2887380e21dbaec475f3d3d6ba2be3aff42. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES7931200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188d0e735ab99584017dd122b31870c775bc09f6e8172804968af22b8f8ac3fe. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QMDA72187299.