Tuna de Derecho de la Universidad de San Martin de Porres
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 0xf3f96458f55a1a7ff4e8d774506683f1c49dc5bcdbe1043033d2a627b2b2e369. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2eef54d8-f89b-4723-9412-dc032593abbf.json and https://artists.proofprofile.net/proofs/artist/2eef54d8-f89b-4723-9412-dc032593abbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Estampas de Tuna: Sebastopol / Las Cintas de Mi Capa / Vampiro / La Tuna Compostelana - En Vivo
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 0x44924528961a09daf4991082ea1b4f42db6c121544ac72d5abfeb466da8fbe83. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:04Z), 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/FR2X41510744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06aaab2f333bb2feb036d871eaf4ddeb165d54ff93ff49ffff2791239b4fb50. 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/FR2X41510746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e34c7320cb443b03cd33550b4bde236122dcd7dad16481480b6885b1aa46ee. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR2X41510752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe737aa9ccc136506bef986d1d0ec200d27e131b77850d9710f508dcdac1f67. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM91712202.