Argüello () is a Spanish surname, most commonly associated with the early settlers in the cities of Granada, Nicaragua and of Córdoba, Argentina, as well as throughout Mexico and, in the United States
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 0xf93275259cf2aabf8b0d60561eb8229e4d6b7bd40b9613b0d057075c02abaedb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b14e6821-f05a-4dc9-8759-5e20191ddf6b.json and https://artists.proofprofile.net/proofs/artist/b14e6821-f05a-4dc9-8759-5e20191ddf6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xaa47bda83041398af55b7ab9956ee1e4f130a1181b821a20cbc8b764b32d4a48. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA62252192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa47bda83041398af55b7ab9956ee1e4f130a1181b821a20cbc8b764b32d4a48. 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/QMDA62252192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b0ba3286886086fa37a81fbd902702ade2e7ca0510217e246a82b4ba47c9b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM7282446810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b6861ec01c9155297dd5e97359fc2a257f9ac81ecc54532d63e9c1ab5ac0eb. 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/COSO11900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e987031ceb7eb2aa1bcc15f84bcf05b21d5aee1d17cf8d1859922f389513d68. 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/QZ5AB2047635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75afeac1e801c700b6b2d158c3b64990acc8f32d10dd6b9b7b8bc00a54778c8c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:00Z), 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/QM6P42376827.