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 0x42c08046587043eb28d337c230b1d2a64b4d842d44cdb97a6536b5ec5cc5cd4a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79a7b9ec-c444-40b2-80b2-42d5b77d3e64.json and https://artists.proofprofile.net/proofs/artist/79a7b9ec-c444-40b2-80b2-42d5b77d3e64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Colombia en Arpa (Colombia en Instrumentos 02)
Popurrí de Pasajes: Siempre Mujer / Amo Mi Llanura / Mis Llanuras / Déjate Querer
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 0xa32d8e1c5ca9fab885e921203e05ca313d4d0c37c79c74f03a09bef310221b3b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR2X41565094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0f4dad90673feb10d53072af690ad596d15bc4cdbe9a952afa7dd263fa215b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR2X41565096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dd80bd83184221870193c014b1d7bde38dd608dd59edcf19d63f2df67a9e83. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:10:03Z), 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/FR2X41565097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5fd6184054e2b0250c41b96d9be7dba0c887bd5e8139cc9e9c22a2a88e827d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR2X41565101.