Huntza is a Basque folk rock band from Bilbao, formed in 2014. The word Huntza is a Basque noun which means "ivy". History The band was created in the streets of Bilbao in 2014. All the members ar
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 0x64c443f45b2e1aef4d5634a4819f040bacaf3a673f483cb757468524130c2b60. 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/4024825d-270a-4c91-a3d8-8a2c0320ad58.json and https://artists.proofprofile.net/proofs/artist/4024825d-270a-4c91-a3d8-8a2c0320ad58.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 0x1bb157bccff2e285af9a64be2c3c87325b6295beeef6912aa02f8817d9a63a7b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ES09S1600712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d59768547a6b9873093ed2ed26ee23a705fe6a52ebc455cf67a9f14472c1d6f. 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/ES09S1600715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542f1cb80d8bd094b64032513202db134091e6cdf9c96f917033edf27b12feab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES09S1600717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc1946957b114b2e008b4d80efea187a60b3e2787b9d58c391db594760d9aa4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:50:13Z), 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/ES09S1600719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d951f7f80cdbff1472e99aa602d474f947580b6b7864f9b5e10df88bb1cf527. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES09S1800566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35dacf67932b828746a556f8c5663b50daa6378587a47d74b74fbc0f5734879. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CH6540897194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7d2b292c36b11a9b1b951ed37f1ca03ec33d205efc4d87dffe6765d6687e9b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH6540897195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10832da5a9d341d1156542166a2f0846eeea8db913bb9fa40f93ec4026eb104c. 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/ES8241920703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531d38503a7e09a023c8af0f6c1c68119e790541e4a06303eaf058e6ac38fbba. 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/ES11D2100647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fa80c1c12633df18c5a4885691ba24b703a3f321cac65c71478a4ec745989f. 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/ES6101901513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7433b88d7491ca3702dfaa6901456b0a8477f744d4eff63dd5074ec0cccdbb4. 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/ES62D1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47539469d7a1204d2fce665c22f4d0a3150041f95c79c2923a7ad5ce61944bba. 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/USL4Q2110979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f079365cb9e45da88658d58ea13dcc2f2d4972d1357557eb693f8f61970c79d. 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/QZHN32406679.