Cala Vento is a spanish indie rock music group formed by Joan Delgado and Aleix Turon, two friends from l'Empordà, after being selected to participate in a workshop training for new groups in which p
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 0x71bd15e8b1bb9b60dbb46c6b2a183b33f855095c882733570b180fb5289c792f. 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/ec61eee1-0c1f-413c-b3ab-60c28950c548.json and https://artists.proofprofile.net/proofs/artist/ec61eee1-0c1f-413c-b3ab-60c28950c548.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 0xe707ca39584f9384b43de1dcea7c3df296fa39b11f38276cf75cc1a497409aaf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES94E2210102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95085ffea77e9fb72838fd5006a717806b4afbfef73a96a79758b9f04576d500. 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/ES94E2210103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dae918abd2ab2639d00b1308fe67924484d5890e8e7ef568e511d8edd19423. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES94E2210106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236aecf863632688d17c1e64120a94c21e7a18bd09f31709f2b984aa8b2a656. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES94E2210107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c62070bddc5d3b56584ea023feb176401ddafb7803757b62c1e601ca3e7a2b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES94E2210108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7aa193cb2d3e452de7b15c5616e5bfd91b554b4a51dcda6c454167249d2f6b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES94E2210109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cb7e8e7157a560a4999d366739353d8f5f484c2ec620464abfeac70d74bcb5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES94E2210110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1640f236ee93cf421c5c392c26400c9023051d9984b8554e4bf33708137368eb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES23A1915501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872c3380c12b1b7b8341f2090ef395ebd36f19399c15b6140e2d34007a8b8e3c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES23A1915505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908270cd303d5ca6155aced803ecab24604d5e6d0aed50440f83c4f7b3251c7f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES23A1915510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343737d557c55154992b53bead0cf6e66d443b3a4a0ea312a59c9961de142444. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6491730501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60d01151c124c607604d8e07d8d65cc01eea9ac7a6e0cc40dbbe71cdf7dc9f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6491730510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30442415a6b7088dfe1a3c01fa4c4b70996e68c8a90963481dec504e3293f76c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6491628501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dfa129bb028ec26b4d313a9796394c75ce964605ecf2f8976b345218d5c8de. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6491628504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc300a469e76e41717b62371819f4255cc25e54a9c44903628ea0554df938aaef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES94E2410901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4df0481b088d15d6486bb00abfa31f72feb2da107f608a85c28ff1613f4815. 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/ESA011510416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bf0253abc56fe77e8becbf3e348edfd48c7bbe3975ddce99c447c0c47222cd. 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/ES71I2000015.