Diomedes Maturan (August 16, 1940 – April 7, 2002) (tagged the "Perry Como of the Philippines" and "The Golden Voice") was an actor who played in Botika sa Baryo (1960) and a grand champion in Tawag n
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 0x0e2df7f0f5363e2030f001a73715d866f41a0b3ae050127098a3822db7cc0bab. 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/8d162d74-c37f-46a8-b24c-cec8c9dd1c09.json and https://artists.proofprofile.net/proofs/artist/8d162d74-c37f-46a8-b24c-cec8c9dd1c09.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 0xaf79274d15150c3377c4cb0ff433b0d2f0fe50c9434ef678176bd627f6bb2b0f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:38:55Z), 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/FR6V82352421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f651b68e64cb584ab0d07db8ef4abe457f1059b5c5316f3159391eec811d16f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGH1042837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ad4ec08f319db9ceb94c341bb6051d463d3aa22f90f92496eff3c7a4ef71b9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:45Z), 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/USCGH1042838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979c64b817323330c4916669bbc5d72bcb63e8f3db50fe81ff569cd8b072cfe0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGH1042841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17c31f0a668bec48c6e411665ed3921ca2be82e8094075d255ab4bfddde59bb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGH1042842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74043b7d55e6bc9b529c6d30628abd339e785557d168ef1679308485885446d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:50:49Z), 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/USCGH1042843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf371ee29d97b48bebf0f1f9e4e0416ca0682260e64757c33a32b0bc0f4f01704. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USCGH1042849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb7c06295e2b95959b8985305f1b175a23d69e3fcb5632832720a9d1675f6b3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USCGH1042853.