Julia Aguilar Martín (born 2 October 1987), known professionally as Julia Martín, is a Spanish singer, songwriter, and record producer from Málaga. She is known for her distinctive use of live looping
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 0xd09ab008b2c74b7828b9a2de83d7fb59e2d729583c98e1fee62495aeca0eda1d. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2692dbf-aa8e-4e07-9cbb-258a9e552966.json and https://artists.proofprofile.net/proofs/artist/b2692dbf-aa8e-4e07-9cbb-258a9e552966.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 0x766e8dc1a46969f91446e0d1c1672d8a4b92fce53b8e21343d41a190bb1c2c31. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHNC2550201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ec97d7cebbc35f5be300681b03f36746f97c865670792a1f0911094eb1555a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNC2550200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e8dc1a46969f91446e0d1c1672d8a4b92fce53b8e21343d41a190bb1c2c31. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:20Z), 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/QZHNC2550201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f34078f7876f4c361b1814391e6463c1d7f4739876f2df01ca53ac110cf4f0e. 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/USCGJ1834598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45e647939bf27fd274412c52a8c1aa39e4cc8f2c7668ee8d97fc542c99781c3. 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/ESA011919059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcab4f9dc2de240a90b77f894773e0eeca41b9eca426307a9aca26b0028c155. 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/ESA092334045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c4ee9ee083c07b1c7ffd48fb6ec95abba22ffa0f3e8fd811a4f89c615b34f9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ESA011718989.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe216d2831399980116d399f75bbbfb713950b2e895ef5bd7f3202cfea039b6ab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:51Z), 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/ES6081840914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc6b6a44e4b4422d31fe7a78ad80dafe6ec0b31e2a03a07406786b2fa39765. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:42:08Z), 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/ES6081840919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f5dc0c7957156d57b1671dbc959acecc0bd42d9ab75abf5d6cee46cc238f7. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ESA011776562.