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 0xa14f88868f5a6888a0e2c9e05f3d2d1b8e33af06b47da1c2ece9c3fa6bae84f5. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/298ffd32-cf0c-49eb-9aad-403dfd8ca37b.json and https://artists.proofprofile.net/proofs/artist/298ffd32-cf0c-49eb-9aad-403dfd8ca37b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vuelan Jotas de Aragón (feat. Rondalla Goya)
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 0xbe8f149a669e90d4cfbe07f67853c84598b9da799cefadc06505fe65beb6321b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ES5270204401.
Cuando Rezas el Rosario / El Canario (feat. Rondalla Goya)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9bee5135194d7c3180e97c4f4cea807fa9a5c9cbb46a38b11779aea6f8e930. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES5270204402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb09c6db4c59b6c9510f3acb764f19c1d3d258e432f52c7579ecd713985595d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES5270204403.
Bien Se Ve Que Es de Tafalla / Carreteros Calandrianos (feat. Rondalla Goya)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f72d38d5b1a3dec493bff1a41c1c1d5f42614b422356ec36477518cdbb1b727. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES5270204405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a00f48b9014ff34a48fb878e126faa37d2b28b997202c5fd2da868fb3de32d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:02:29Z), 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/ES5270204407.
Y Otra Vez Vuelvo a Buscarte / Soñé Soñé (feat. Orquesta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf688d84ba4c2ca02cb749c28fcdd80b674e743635aec60808e991c669784327e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:00:38Z), 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/ES5270204412.