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 0x207cdcc1cf001497b2cbcb77a962f815345b279b04ca808333a06228cd61c3ba. 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/35878805-ad6d-4a5c-82f4-2f5474797e30.json and https://artists.proofprofile.net/proofs/artist/35878805-ad6d-4a5c-82f4-2f5474797e30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Philippine Guitar Music - Kundiman and Harana, Vol. 1
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 0xa3f032e2c44ec37f5b1963e3214a19f36e5f006c28c2d22602172f77f1fe42c9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:56Z), 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/TCAGQ2236003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2404217c5b1f8a56bcb80fb217038a46ae07f8ee8629907111b41c0422d1afc3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAGQ2236008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53565bc7d9bb20b53f368cd2be92af02584a4a907a00fc96ea9e7dd04fb39ca8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:18:16Z), 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/TCAGQ2236018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b2851bb17e3c3441b72e115118066a6223fdfc894084dcef3e001973d865f. 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/TCAGQ2236022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e95d2c9912a95d6d86e84623fcc4f0ae3b825dbd96288d501be2e2895bea128. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAGQ2236033.
Christmas Carols on Solo Classical Guitar
Philippine Guitar Music - Kundiman and Harana, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d2ed7be78807137d3522c85474b240360da0e2290cee063889d03a24f8f111. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:09:08Z), 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/TCAGQ2284405.
Philippine Guitar Music - Kundiman and Harana, Vol. 3
Raffy Lata Plays the Music of Agustin Barrios
Raffy Lata Plays the Music of Francisco Tarrega
Philippine Guitar Music - Kundiman and Harana, Vol. 4
Philippine Guitar Music - Original Pilipino Music, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401812944d0ae9766d69f3ee3c1f6cddcac1d3bb5ab53a4c6597f3c444901fab. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:01Z), 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/TCAGU2377111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1080e481002b9cf9549e3f39a6c5fe57c30309a733ed978d323ae32df98fdcd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAGU2377123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bcf8fe8b5dfd51941862d8a6efcfa6a98391a7c4dc2db61f6e51819f1046d9. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TCAGU2377130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312bf1b05154e7a769ce02ad33f442e82555c8fd0472a0bc09cf661b8b4ffd59. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAGU2377143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762683a8d51faa485e489bf826eae5c7953efff9d547c4892a9819fccb9f5869. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:07Z), 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/TCAGU2377169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47693824c2c583606296df9f456a423d0a27ad74d5e634c3f6edc72043d269dc. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAGU2377172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9775788fd7ddff1d7e5735784ee403bf305ca144e81016ab9e9835bcc31aa136. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAGU2377174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb54ab2992f1a1c9b4a6b5546f4e45a56268e128d9db3072e8943376fcc21ac. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHA2326921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2505e89b83e8c2ca00005cd03a41e20dd173f1ca08a82373ad0289e9fd156f. 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/TCAHA2326927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a3ddea41bab994962a13611be617cf1f0b489e738e7b375d3757367ad91f2a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:10:59Z), 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/TCAHA2326936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad521f8de0594140cc33f47b22ddca08a770fec07a46d8c273f6ccb4694ca8cb. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCAHA2326939.
Philippine Guitar Music - Kundiman and Harana, Vol. 5
Philippine Guitar Music - Kundiman and Harana, Vol. 6
Philippine Liturgical Music on Classical Guitar, Vol.1
Philippine Liturgical Music on Classical Guitar, Vol. 2
Philippine Liturgical Music on Classical Guitar, Vol. 3
Philippine Liturgical Music on Classical Guitar, Vol. 4