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 0x24a7718e7e32c08676514142cc679ae52c82c5e1293673d9f976994749da3e27. 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/b6f12b94-3e46-4d6b-bf31-e0d971ec9ad1.json and https://artists.proofprofile.net/proofs/artist/b6f12b94-3e46-4d6b-bf31-e0d971ec9ad1.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 0x44b99b305715fe98177ea1c2299afdf91617336664477f624bff58d8286622e4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:43:03Z), 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/PHI010200381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3b97d6d875e924467f181bc832b54aa1257c6b9a353e8b379c205a43a99eda. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/PHI010200382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b09e2340e13733179150509c830fc4976b0090731778e491c201ad8200e16. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/PHI010200384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec6e47ea242f91e23a733b039fd032140030302e3a6044ee54ef440a79d4365. 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/PHI010200386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93d4f6e8d33bd2fe5703927b8b1d9a3ab8a8fd97cd9701149423b33db52c5a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:39:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PHI010200387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f7d96ae270e48b01a663e220ea33edf24b86cd96bcbb490855740f6c8f33be. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:53Z), 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/PHI010200388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1819abdb840258c2282566770d638a74e03711200f532c18a1aa6f60f815536. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PHI010200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ca445b6def3b7341e743c4c51985b8f041501a3538fdda47256a436b69c8f2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:53Z), 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/PHI010200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688afb835c76b3a22e615c1066a4dffa798629ec595023175f1c7b1d855f9e86. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:46Z), 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/PHI010200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871013d30de2c8126fba1ec2bf20dfde67bf8b3b4c0a77b5e1b606f2cc695806. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/PHI010200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937574a557c9881cb974f5c864026b3edc74fbab6a43fe01d92d2494a44c88ed. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:00:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PHI010200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009e3c1f3162567eba094c4e78ea5aeb10de10aea76911c24cc9959d4907f0a2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/PHI010200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01474504ed73038c850ed17d99183cb45d8faf4ed7d47f96952ff9be4450852. 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/PHI010200404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5f58d788182aa8a621ee1f13aedc94f57707f200961b3681cdc8503b78bd16. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:38Z), 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/PHI010200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb2f4d3b2ee7c30cfe367920cbbe90279439433c3e710bb444c82ae45aa74e8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:02Z), 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/PHI010200407.
Mga Awiting Pambata Collection, Vol. 1 (Tagalog Nursery Rhymes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e36d940467ccec39df1801d0585444660e3723c73e83ef1ca7d7fb6012b8c7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:48:09Z), 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/PHI011606518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6129a886598e229959d8f2427bb4a9ec97fff4703ee491e623b85bda70923b19. 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/PHI011606532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0360544a8bb6f3cc5324e34f36fd29d32897493eba6a62c2250b49a4418770. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/PHI011606534.
Mga Awiting Pambata Collection, Vol. 2 (Tagalog Nursery Rhymes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903c6881f12a8745995882887cf6bb28d28939f545a3a449a5715baeeb5cb8c8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:59Z), 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/PHI011606549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55994f86247842a237cde5b62f3fea92fd25d9a134eae70966dd0cb0aa975a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PHI011606568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee10ec8209a57184570bd1fc31d7af41ec9b225990b5d235278472f0d99a6a9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PHI011606550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2c0d91004d7529322dab5fe93d96bc0eb934d8a1e455c49dfe7a170a6a51d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:04:25Z), 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/PHI011606560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36d373e34053e2a4ddf0fc2561cad6d8f8126f8282f287a4c8b6bd5e262ec14. 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/PHI011606559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4de1533a6ce592f62d13a4607d7b5405b3d99d8d2032c1b3a1d3776ed7f7024. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:53:59Z), 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/PHI011606563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d6b50ff3e18773d1f92e2034f0ac66c4d0a1e520a7640af0bd39f36ccf9fb. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:29:57Z), 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/PHI011606564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e8138239c2ea023960590bf71b7d5d71b01519e38defc317baadcf59cacef0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/PHI011606558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c20bc3069b58562920905355884ae0c51da5ae37b1b1f7e4b245a64234b0c2. 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/PHI011606570.