Fede Dorcaz (28 January 1996 – 9 October 2025) was an Argentine model and singer. He first worked as a model in Spain and later became a singer in Argentina, with songs like Cara Bonita and Volver A E
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 0x912569f72d9cec330c7a663441c3ebebcb4e6d3dc87d2804e77b7bd6aa5d1d4d. 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/42554292-7648-4800-973b-5639567b7757.json and https://artists.proofprofile.net/proofs/artist/42554292-7648-4800-973b-5639567b7757.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 0xa349b30bf07a679df2a9492174eeeb02e83ab8c15309cfe862a49b8ada301767. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF6804770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c5a2df45241dde1da27005a294290cc0345d8383dfcd2aa2adf73c1a5b65b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLPF6802168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33513e05cf27bbe7fdd70b73a2dbbe5578f912d1efe86af2121069ecf257969e. 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/GBLPF6804771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71147fa18ebab0474f73a0113364711eba043d9897a4f65cc0ef2b9860239b2. 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/QMFME2343560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3188a3580ac9f41e3aac15b40a74d7b559fa227aa4fe95b8dbad58ab0ac279. 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/MXUM72500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c5a2df45241dde1da27005a294290cc0345d8383dfcd2aa2adf73c1a5b65b. 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/GBLPF6802168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8096285738f2fa00c9dc0e302bb13a0190c7db165e306c063ffc867eb500ff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLPF6801622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3fcaa5b05c758f175f066be7a69cc3fd264233b0d919f81d4e22ff4c91319c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLRD52406263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6c7926aed6aafc4213907a68c2d6f8e39a5c515cffd48c56d3643a277183cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1944205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb972678e31027e65aa15f6c3db8582a7902ccbcaf230789ea083a0edacf0e56c. 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/NLRD51831715.