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 0xad455426c25428c3eeb1489e91a522944f795fc6a54dcbfb131511b004bcc8b6. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d302d8a9-f910-4046-a843-34ba25d83a63.json and https://artists.proofprofile.net/proofs/artist/d302d8a9-f910-4046-a843-34ba25d83a63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sesiones De Sueño Tranquilo: Música Para Descansar
Frecuencias Felinas: Música Para La Serenidad De Los Gatos
Armonías Infantiles: Música Suave Para El Aprendizaje Temprano
Canciones De Cuna Calmantes Para Noches De Sueño Del Bebé
Canciones De Cuna Del Bebé: Música Nocturna Suave
Sueños Suaves: Colección Para El Sueño De Bebés
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 0x627cf810430cc57ea5de725f78000477532883765710a28b09d28c4068bc8be1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZEB2465469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e567171456e789a40d3842a8c106a757b5b6a35c23206315da88c20de1de542. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZZEB2465477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4b15c63f043839d53ec0ba23f811ed24f4c47f12741d0ec0a7ed482bcd1ee1. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZZEB2465487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d8bec4cf82303a22db2c658991ef41863bb9794236971d9d6479a840d1a477. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZZEB2465495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b4beeb46d248d0508871cd15fb0ac7da5ee95cbaec063bae8027cbcbbdd4b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZEB2465503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3c0cda091c431d785f09ea15fc92d02c72d52eec164540dec1cfad9d2d331a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZZEB2465511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acbc5eab731b2ca52b1505cfa13b11c4b74acc38794611e2d637ba5abf43373. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZZEB2465519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4d151bcd7b86d5a86fb5fbfad621a4fc9f0ea715b6951dfa3d98c0e9672f4f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZEB2465527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5200052267a74c8e705ee597470369fbfc1463107e523549c84bf220d4f022. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZZEB2465535.