thumb|300px|Pep Sala Pep Sala (born 17 July 1960) is a Catalan musician, songwriter and record producer. With singer Carles Sabater, Sala formed the rock català group Sau, which achieved great popula
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 0x55fce843b4972230afc8c0293168ea4444ee213ff7a8e0b1d66c67cbcd275b89. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8221cfff-1780-4fa7-903c-76d8ebb4813c.json and https://artists.proofprofile.net/proofs/artist/8221cfff-1780-4fa7-903c-76d8ebb4813c.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 0x50e72cea756a8c871a1a97b582d99fe6847d279eb7dbf9ef2173c6bc74465472. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/ES5060304609.
Un Petit Moment De Dubte (Bonus Track Version)
Un Petit Moment de Dubte (Bonus Version)
Manual Teòric i Pràctic Sobre el Pas del Temps
L'Onze de Setembre 2014 (Versió per l'Assemblea Nacional Catalana 2014)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc768a60b2b9b25219cdfc6089dc2d3c8c912e6ac7c02ba4f3a832e75325dd8. 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/ES11B1600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f10c5381f3a1873348e2198289ed8c1bee9d06b26d9e65a975acc143534632. 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/ES11B1600406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4015184940a212bc133ee9dc15d364cef669623b6fd75da7a1209ccfeaedba78. 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/ES11B1600407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04941207c7ff52f223a6b9525cf39aaf73fba01c353f35adf26a7b50e145e50. 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/ES11B1600408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39622b192f3075662ea87b23f1e1cd7d060bc46f1d563dc330863ce6fbad303. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES11B1600411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424c7582c8d67b25c21bd93bc4b35d648d0e8e1668eaa23ac8bb9af82758278d. 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/ES11B1600415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcc966014ae78c4638e1fa7cd02c83796bd39cf6c8dffa493774b91b881eee6. 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/ES11B1400201.
Everybody's Got To Learn Sometimes (Sospitosos habituals)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f95a78eba7838b37b575851ff3eb42384e1dfe87c46c37122412a9eee67951. 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/ES5060306010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694d03fc43e3805d0e5beb4818ac171f2b0122d43a6d697730ba86009b16ea28. 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/ES6102025711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783e13df925c058938d3f2e9636a660bb1c626199ba6e0a563dbf02993b5e413. 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/ES5950200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f32464e4377170855c6ef53f312878e5909ba8124e75da2b490d100d17e958e. 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/ES5950601844.