thumb|Mocedades (2006) Mocedades () is a Spanish singing group from the Basque Country, who represented Spain in the Eurovision Song Contest in 1973 with the hit song "Eres tú". Since June 2014, Moce
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 0x5ae9c017311cce4cf2cf2bb8df59058cf5dcf1c07f50172b4b17cf2ef68cd104. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/863f102d-f511-4ea5-a8d2-ea0d571dfa7a.json and https://artists.proofprofile.net/proofs/artist/863f102d-f511-4ea5-a8d2-ea0d571dfa7a.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 0xceeebf7165048e0b11dcaa845126f7b7cd4541f4ca46131533f99ceffefa63d0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:12Z), 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/USCGJ1567333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cde8de6db525ba75b9f48e68f7364c18c431a10d01978d20660c9d3fc961e5e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:21:36Z), 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/USCGJ1567334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5d76d9ef0b52a94c410b0ebd71177a66771ffc4af8024dfb66d461a7540fdd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ1567335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5ad87c9e55323a21375b4c256672e3eead690a3a6c4ac872121e2b8d5906e5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGJ1567340.