Daniel Sosa Bertoni (18 January 1983) is a Paraguayan rower who competed at the 2004 Summer Olympics. Sosa competed in the single sculls event at the Olympics, where he came last in his heat of five
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 0x84724fa2cdad7f69148b9b3f5a9fe60f3a945c02c791953b2d8cad75f19f890e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4e45a05-2d45-438f-80a4-29f08bda5cd1.json and https://artists.proofprofile.net/proofs/artist/d4e45a05-2d45-438f-80a4-29f08bda5cd1.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 0x2587454c9133f91db1221fb05b4567f2c0f8b5593f7fb3996d995fb638abebd0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:55:27Z), 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/MXB232000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8a421db4fc3e7c34335cf9c7fdb567994194a691a5a274268d100a7f562347. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXB232000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdadeebe5b6c58dd01b3e1542edf644ab019a229a81bf1cc0b13da02eb56e79f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:59Z), 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/MXB232000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a56f38378fe1e793e7a6384e068d42fe40bd99c0b3ae8674a8b51e97a8fd63. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/MXB232000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f69cb5cdd9a85766b479b6c091aff94865e214c9e7ae0a87f3fd4159287c36. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/MXB232000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b60821bf815cf0b9a6f80a13a5fb1d690982e87ee3ba7323b0d0ad3ecbeb836. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:44:37Z), 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/MXB232000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d751b7909fe70d3818be4dd232a8e7c2c954fe3660fe2dfa6daaa5c88e44a4. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/MXB232000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14a32cd7ce52e947e3cbda7a485555723bf3d746a6f8c040e7caf5a1f7a2505. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXB232000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe15b4e63d001b8fd97792561e06bb8f7cc050a94d8cb7f18f44dfe5335c5f5b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/MXB232000032.