Rafael Martínez Carpena, known as Rafa Blas (born 8 November 1986, in Albacete), is a Spanish rock and heavy metal-singer, mostly known as the winner of Spanish talent show La Voz in 2012. Before bein
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 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 0xa5dcf9cb7ede6a9511c0b0b847ecbb79df040758afd7d70d5c26489924c5d510. 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/1db3fe71-e2e6-4b0e-9731-59fdb06ca24a.json and https://artists.proofprofile.net/proofs/artist/1db3fe71-e2e6-4b0e-9731-59fdb06ca24a.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 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 0xb7f189dd5ee386de01628cd3c0279fa2b82339527fa44b1793459101dcff50aa. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ES71G1872066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98ca7534a5ed5459ca071d2a4ccff9a2205faf11ce3a2afe961faa005557cc5. 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/ES5701300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f90037145545d05bf13a58b7306e2cd01029fe7177f92db821d13a7f73cb9a. 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/ES5701300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d8ea3d02387be4f6739cb27f3c58140e4d2128c72f5a39ba6a56f99be099f2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES5701300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe8539e5c0a448a5857f89cd132155c4a4edf30fe76644cad5762acdaff132. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES8241429901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed774123c3b2905dc4bc7f812d0087241cc2587a21c546ff101d3a688f565a3. 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/ES8241429903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf0375a371945e992f5e1781e8085ce06446d83eb40b97b3dae5b034ca5f840. 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/ES8241429907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505d53007ea3f43eff3d2dce6da1e6cbfed651d7c5e0a00fb50f8e5813e3702e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES8241429908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f88a017ac15d3a7533efdd004273e9d280ee20e620f2423685ba7e32375d3a. 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/ES8241429912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a5216a6b4ca688923aac29bb3b5531da599180ce582c6097163c455e355066. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/ES71G2338341.
Seres Urbanos Hasta Que Aguante el Corazón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20e5e00aa5e73fb5130318e1ef86937aaa4557b34368e05375e9e04139787d. 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/QZNW72305570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360689e0f4b5121207a85e61bb4dac81109bf11e126e0d6c86f0c7ceda92ba97. 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/DEA812400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e6487bc89b1a8de7a112f2ae91df4674ef21437d7e04d17a3eee31293bbdde. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES8241658801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f90611a163ff4406df971b29b74ff7aea114b3e4648dd2b143b74b29cc3666. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES5701201431.