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 0x597e8648ae88e6c6eef71ae33848ac319bdcd04539631e7dcd8a9c43b4e5bd70. 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/0a8de427-d5e9-422e-8db7-f005e0cb72d2.json and https://artists.proofprofile.net/proofs/artist/0a8de427-d5e9-422e-8db7-f005e0cb72d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anthony Castelo: 40th Anniversary Collection
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 0x71eb08f29c416cdaf50887be949c8776d855ca7e1a9e62d5e87b1dda05c92545. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PHV021010071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e0e78568d8bc6d1040d91609e92f79b1f21ee59daa2eedf84ff738cc17557f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PHV021010072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce1213fabd4f0ed379a74bf296536993de144bbae4c208dafe155d79c7d591b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PHV021010073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241d48d2b688b771efcf39eecb443b7d6048af247e32f7d330cf5f77e55fcac1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PHV021010076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbbf64e85c6185261f48f446026ece451fbf6113d6cd8877c17d9a700ceedb5. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/PHV021011051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935e49e181c42f124b447cbb0c92980b75086fe6ec27bd8e0184deea500fab35. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PHV021011049.
OPM Back to Back Hits of Anthony Castelo & Rico J. Puno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93e6699179ee77a053eafb8565e48543c82861aa2372f33d3cbfbdeaa2985d8. 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/PHV021010067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bee58f68c59b6aacea47ec818e5a889c42e8e3bbb8110db6bd5038557ef035b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/PHV021010074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f12b0c712d9cb1522ff3f2ef1be4ce4b456e64283c57e38a86f2540fad74e9. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/PHV021010069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e1a7be8e24d3cb94d075e2ed196711c2a87a6fac1fa0067a33962c5bcbcab4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PHV021010070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad70312f4e4c2c99dcd53444e0b4f6d9be1b4862278b2ef82194027392bdae3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PHV021011264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014a0ef3131265c0fc566bad2042bfdaad6b9f8ba675245ac5c092d26de859c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PHV021110035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e22a8aacb20bdc6331ce52777dac0c2f57202a7fe8274fa3269e1175dbd8b35. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PHV021010376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc860621d309d88036945ba449768a911924ad08bfc4288735e1f82e1f1326c5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/PHV021110038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939e9b6f8e3eb2917135cc0290058a701d09c093e68bf85779568d8990fa868f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PHV021010379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93e6699179ee77a053eafb8565e48543c82861aa2372f33d3cbfbdeaa2985d8. 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/PHV021010067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f12b0c712d9cb1522ff3f2ef1be4ce4b456e64283c57e38a86f2540fad74e9. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/PHV021010069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bee58f68c59b6aacea47ec818e5a889c42e8e3bbb8110db6bd5038557ef035b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/PHV021010074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eb08f29c416cdaf50887be949c8776d855ca7e1a9e62d5e87b1dda05c92545. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PHV021010071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241d48d2b688b771efcf39eecb443b7d6048af247e32f7d330cf5f77e55fcac1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PHV021010076.
Mga Awitin Ni Paul Williams - We've Only Just Begun, You and Me Against the World, Nice to Be Around, I Won't Last a Day Without
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0537583e1ff601a1d6921ceec5a075b4842ff9747257546746037630948bb882. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PHV021011047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bccfa4c76f4086d36ecd59716b29877efe0fbfee6764144edc74180b251f8ba. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/PHV021011048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6311b512e60c106c9364f4bc0d3511eb4121db98210a8db926e94ca4a043e6ec. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PHV021010068.