Hernando Franco (1532 – November 28, 1585) was a Spanish composer of the Renaissance, who was mainly active in Guatemala and Mexico. Life Franco was born in Galizuela (now part of Esparragosa de L
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 0x30e1c66101746abf7d81d12a86bb6384b3050e68707a2c800f9e588ff6ee14cf. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c297ebd4-1054-4bc2-93b6-970e8ab74e27.json and https://artists.proofprofile.net/proofs/artist/c297ebd4-1054-4bc2-93b6-970e8ab74e27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Franco: Officium defunctorum novohispanicum México
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 0x8c9bf419cb550501e8bb0b174cbca228e1db8578f57a18dedb0f19303eedd80f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USPMZ1207520.
New World Symphonies: Baroque Music from Latin America
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7611e79370aff0f2ed85cc0929807860fd6350598cf963313914dd3052ea23. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBAJY0338010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675d89481375b358493cc8d2d548b100373ef57d5b8d6cb693c2b2279820562b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEAGA0005070.
Franco: Sancta Maria, a 5: "Sancta Maria e yn il huicac cihuapille"
Spain and the New World - Renaissance music from Aragon and Mexico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f9ec80195e3ee2aa5278b53a878becd4e99b9c390d23e2f22bd07c62b58cf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBAYC9105194.
Moon, Sun & All Things: Baroque Music from Latin America 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81015d2d34e1d0a5f2f766916e9b98ae3536da2c4cdc4afebdb210aaa3a4c16. 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/GBAJY0552409.