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 0x66f5cc1af5d9b48d4ef6541b6afb94a62bf9019a88ff57966672d129a2fa9e0b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8acb65eb-15fd-429c-9814-3224f89ac8a1.json and https://artists.proofprofile.net/proofs/artist/8acb65eb-15fd-429c-9814-3224f89ac8a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trueno vs Wolf | Octavos de Final Gran Rex
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 0x3cf193f0b3dcbca3a48c3bbd6507d6c89e9517f2f6b190de9a5b3d7ec0ae2687. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMBZ92271016.
Klan vs Lit Killah | Octavos de Final Gran Rex
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2da25596dd5f11570e82e69d30c9be621a6da67fa768b63a89eac06aab8789. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMBZ92271013.
Trueno vs Replik | Cuartos de Final Gran Rex
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabfdc1ed501d92a0144ba6f0ab3c2b2755f5e353eadb73018867148d2b05731. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ92271020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef64e8f32fa143b9c578b04f087d3fb2eb3109bafe85954df17270b6984fb850. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMBZ92271022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34668a9e67192f8a3c6b251c5f071960f6f32e8c01566b02d5a3066c6013f35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92271023.
Cruce de Campeones Regional Rosario 2018
Cruce de Campeones Regional Tecnópolis 2018
Tiago vs Ezze: Octavos de Final Cdc Tecnopolis 2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe627e27c67d1fb6683709d36fdce365c70b407a52f23b779443d06066e0a8eb9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMDA72206700.
Nacho vs Tiago - Cuartos de Final Cdc Tecnopolis 2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba57581d3413a4dada4453e26124ecbf2f828f2909992574d7714265425d4aa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMDA72206707.
Mks vs Replik - Cuartos de Final Cdc Tecnopolis 2018
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9223a69594e310dcdff6db19e72e8dbb561f69c5fdb3a302f65108b0f7faee8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA72206709.
Cruce de Campeones Regional Córdoba 2018
Cruce de Campeones Regional Asunción 2019