Agustín Daniel Casanova Sommaruga (born 14 December 1993) is an Uruguayan singer, songwriter and actor. He rose to prominence as the vocalist of the cumbia pop band Márama, which achieved internationa
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 0x45f6b75cf8303d33c89dc1454cb8048fe2134e965474be5ad1ee1ecd888fded3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4319d20-1ad5-40ef-8e04-4ce963df0b9a.json and https://artists.proofprofile.net/proofs/artist/f4319d20-1ad5-40ef-8e04-4ce963df0b9a.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 0x6d6794ac985b2dec7ea4e4e5dcb4343bffdfbcbe2251b1893ee30798dd9e2423. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UYM121805273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9839bfee555e3ab2aa736040874de2a0f8c202e447d2b24f1028c1d56cedd299. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UYM121902860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dc1faa81dd8a127e5c0a7e10c07995f6e5322566ede3ffa12e1254bfb11e16. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UYM122002480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aba54b995668e2147b26a2cb6f73c0bdf7a3918b94919377d88b86b104b7cb6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UYM122103847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471b76c46ff5f896ef32047b6e8e1d9a87e4bd8fdf100a6390d32d6beaa3cda4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UYM122104402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ce42148eedc3e3023235a3df043b038b07a35ef6ca36f673df147d4abe4a11. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:01:55Z), 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/UYM122104403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00714b6a47a59cc78bdd5b53764524abc3ac91e3ec762748ff42c81714b2c0ae. 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/UYM122003616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac31e77bcd0a6a229a1b1c068968769413900e311e4da4942158379a90114e4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UYB142224611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fbd95f3426b3cea7c48459c41233ce1bb96b464b3c5ce256d478b278207719. 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/UYM121903874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1edbf401f06f84fd495de3158e524ddbf9ba51f874417f6b19da377812ccc76. 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/ARF111700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaa814d7c6c1f954dba7ca979ae6db4d1ac6857dccd84629907032609ac2e61. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARF111700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccebae9a6a35f577a6993850147aece9e55504cd534d14806a17050cdea84029. 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/ARF111800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6fe9fd5e0b435beeff2cad7c793b26528b51e34b4892ad2905301d6115b6e1. 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/ARF111800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6981a9a0c77ca2abf21c2fae7b42757a2910cc687571d9c79f05cd2a960d886. 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/ARF111800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d4da906b756e9bfa852b367aa2e09948109fcc984c617843ac0adcbb18f56f. 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/ARF111800120.