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 0x3c652390bed417d3083715e8fcf470f77104e3d7602059626eeb10747cf4976a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e5601d5-5d2a-43ea-bf00-a38ab9c049cd.json and https://artists.proofprofile.net/proofs/artist/8e5601d5-5d2a-43ea-bf00-a38ab9c049cd.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 0x7a23e7d3851ff89d5cc03238202f90ac0098db3e2aeb33404cd65a96b51484bb. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZES61823167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b16361fed7a02310e91067f6415a372cc6ee49eeb947f04d7bdf298369c9b1. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QZES61823170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d24d44e5e6a314e33e8fc8820dcc3369b82462d0760b35731d80b68e4d9939. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:18Z), 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/QZES61823171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af95a582f5053fb1d1fd13ed791f14b5e6633c0e597e7cc0ee28c857557a9e4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES61823174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d6197419e5488e049abb16d3c62e2563589a1941b9339afae1995d95c0ded. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZES61823175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b27780ef8824bf23e4084b1e322a24cf9ad7714eb97e2ffebf0da814d076cf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES61823156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8bd6485858df7c676b33646198a1dfd992e675b4eef2fed1490cd42bd16250. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/QZES61823158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f31ee94bf07ca0eb94f6eac47972afff17747e86d6bd1e0b9cb6fc5908333a0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES61823159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad185c76c59dd3b7e0581a27ccbd9ccfb60eee6dfd248f715c13920513c5225. 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/QZES61823160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022c647ecd213864a522635d0e34a7f2fbf323410ae44886d8b7d162f91821eb. 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/QZES61823162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb12f508fdb4bee250713138a9aaec8dcc88062e1c2e6f08cc3e107218a6d17. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZES61823163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396b0ee94366a99516dffbbf01acdcfb3a890f6c3e1b094d3d85b4c002cb5177. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ62066039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375f60def14c95962467dea560790ec3d6f4d032a648531a8e176335f439b448. 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/QZFZ62066041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9916cb3e1304efba534c0a9fbbc02e66df496b25921431d29f27b8a1f41c98e2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ62066042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2797886cd5f729966131693ce5ffa4d623cee9d103f4a1ab40fa587287005ef2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:03:58Z), 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/QZFZ62066048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02282ad36065bc689771df1e834c54ccc68d9ed8fb7c9a9ab3a936d9a0014a17. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:17Z), 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/QZTAT2276307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a2c28d78b88a8ff4a3925d69e4eb445e8fdc08cc6f70311c98a3fd7e7f0c0a. 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/QZNWS2348474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8331d9384a46a564026b61ce42e5913e4611094d49c7e95d1876fe2eab0397f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA52546551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feb68936cfeac1a10b5fb6ff022fa2201a44305155f0067b2f88149009032ce. 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/QZDA52548071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e8aced70b6b456e5049cc4115ab9fe3e442a0a4b506a5956f8d0fc3020b41f. 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/QZDA52549885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7635ed4eaf720db43f0e48bebbdfa1078e17d2553bd5866383f35078bbec8db. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA52549882.