Marta Susana Robles Gutiérrez (born 30 June 1963) is a Spanish journalist and writer. Radio Marta Robles holds a degree in Information Sciences, Journalism branch, from the Complutense University of
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 0x70dc5d43c525e1fc0809d45e6b9d17e129fe2be6267f014d6337cc677ad0f5c3. 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/0d65e672-040b-4b0c-9e31-fdc58d2be615.json and https://artists.proofprofile.net/proofs/artist/0d65e672-040b-4b0c-9e31-fdc58d2be615.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 0xb91b3e5016a1b8f991a505e73cd58ae8523c8429a1d2b07e043f34744f65d218. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5121000467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850122e8c3ac1060074a3cdace2329672b5bf18e3dec5cd717ac46f20a4bb438. 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/ES5121000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317b4b564c4ef635e527d7c9160bacf9e0f16d4c9691986cc85636e1c0818e35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5121000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e6a04deb4d72c6b6932e271e055c08bde518fd6ba4d38713f064d9708f169a. 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/ES5121000470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0534a0c283f9f200f4527fba2bc3c85b1741319528e49e53b9a37a4ee404af. 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/ES5121000471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a242570e20724147ee22a1ab18d01fd573d130c1f5c2ac793557dc9b37ab48. 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/ES5121000472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62064ac4ad61090377b35c143ce2ec6dc246c2a24afecddc02e0c2ce1ad2c60. 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/ES5121000473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2315fed63133defefeea68f1dc6aa067ff2146fa23d97af9dbf13e7280ba1b67. 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/ES5121000474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8e26128904091ced9da19761b7c05b0408e2668e1d9c479c010065bc307ea3. 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/ES5121000475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92240b833275d3cc0050f94adf59a119e0c323dd569c2965336fa9276f26a45f. 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/ES5121000476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ed24a5b77fd21d9f5c803d8596366667feb7ef2d84af48b65d16b8375d21d0. 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/ES5121000477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c50aad76fe7ab2a0428140abbbe292a2dfcdcce83e51146923718b3ed751e51. 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/ES5121000478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ba6f0518a122faec9166d998b10e9fd78e8d017194c7aa311e24ba355fb97. 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/ES5121000479.