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 0xd038c98b1dccf960d8c5141ef85d481eb308e5370a5f81ebd1c6505058414c7b. 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/f5357049-8712-4f49-b0a9-2acbdf332a5c.json and https://artists.proofprofile.net/proofs/artist/f5357049-8712-4f49-b0a9-2acbdf332a5c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Panuluyan 1979 Awiting Panalangin Sa Pasko (Remastered)
Panuluyan 1979 Awiting Panalangin Sa Pasko [Remastered (2018)]
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 0x1c95027038759f87a226827d39b8426880549722de317912eacea8e2e2ca9216. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201827022 — a six-check JSON result.
Pansol Choir at the 1999 I Concurso Coral de Ateneo (Live)
Sunday Psalms (Year A), Vol. 7 [Instrumentals]
Sunday Psalms (Year A), Vol. 8 [Instrumentals]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d364b731e259805dbb63c78dc268bf024452107255c87cd00b92aaf52bc91f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2404737 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c6774586da72c3c7d39113a43e34f9fe9e6379d29cc796e51e8d9fafa8d20b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2404738 — a six-check JSON result.
Ang Pananalangin sa Halamanan, Kagat-dilim (Pt. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e6625b0db5f3414db51f34c9f1b0e4499bef55c3e9b326ab946060fd00bf51. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2404740 — a six-check JSON result.
Ang Pananalangin sa Halamanan, Kagat-dilim (Pt. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23773778e1a780275f1ddc044cc93949349259e52d91f8d91c3e4df09904fe34. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2404741 — a six-check JSON result.
Ang Pananalangin sa Halamanan, Kagat-dilim (Pt. 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f8e75b748418371171ef7b97181834d03e97e1f2259526e0d011acc6a9e6bc. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2404742 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847c8e5c062335ed93400a59fe32afeb74e9cdad0a434018414949a092c4dd8a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2404744 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450e3221ee6e26f3ec6b54e89506af2cdfb4262dbd82276e3737476dea7e2e5c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2404746 — a six-check JSON result.
Ang Pagsasalubong nina Hesus at Maria (Pt. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b895cfcef4c48652e41ee017df397188f1e35896f11fb8afbb07df11de106f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2404759 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28144f72c6c54364bc7e99ef53fd29b9e7516cf05fe09a6f086c7df69b4cbb82. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2405183 — a six-check JSON result.
Nakita Ko Ang Tubig (Salin ng "Vidi Aquam" Aklat ng Pagmimisa sa Roma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dda3a792300304f52944855a1602d51984097869ec4e1604c287aca22d7416. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2405185 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa9d3ea60ef35107a32926c66892172a3080cc2a99ad38498e16b9d41ecfd3f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL8RL2436207 — a six-check JSON result.
Tubig at Liwanag (Mga Awitin Para sa Pagdiriwang at Paggawad ng mga Sakramento)
Gifted to Give (Songs for the 500 Years of Christianity in the Philippines)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7e98ce58cbe7774ffb57bceab6d3e51b621143f5f80dfcd12d397068ce5e20. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX282129807 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8fdfcf018f91c3af939681f8ad3b027c28630f5c0a2360ca82b694d13fb65d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX282129808 — a six-check JSON result.