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 0x49464108d7cb0e224b24258c8cf56e0569dc353aed4e2bd25c39510c74666621. 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/bc28422f-4e22-4ab4-8c2c-98eb2cd8139a.json and https://artists.proofprofile.net/proofs/artist/bc28422f-4e22-4ab4-8c2c-98eb2cd8139a.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 0x8616791e511624bf16a93ee3628bdfa07bfe969950085fa70a6f3b98f8bca1db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2382661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f4e7bbac8ece301d9ba5e0af5ce552116aa53e1618f6756d13ac4d8a48d1f7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBKQU2382662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa41b6ad9dc1154c4d692526cdf7dcaa42e11d16bb306de77db928de5aefe3a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742309929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa738ca0b89fdb33309c6ce8441e61d0961f76025897d618aee627ea2b10f7654. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEY472371926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e76b790332ab6c8515c021269f8c32ba57ed2c4519f350c4c21cf38df9b227. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEY472371927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822b500fae45526a7df3ce617ea00a56ddf782f908811f8f4823a2890ffca20e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEY472371928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4ed33fbd99400a0e4ab94004f55e7dd2a2328032c7b85f2fe32422c3c6d1f8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEY472371930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e76b790332ab6c8515c021269f8c32ba57ed2c4519f350c4c21cf38df9b227. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEY472371927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59c837a986d42658dc3f59f210c0acb4d03801cfe9bc47083a32c06c75aa3cf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2217165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0fca1e77cf7026b30f03ba32bd9be1252418ae961a13a046b76bc5741643f6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2217166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e794c8793c318d23432f7402c6340f22f5ce6cd5981a614d92f9cc75996dc3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLV62122389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2e3d4a80b763d7126364d3e6602598a6889c46079ce324b3f6f49526d7ac6a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLV62122392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9dbecc41fb05d68caaf0407a81ea4a382032bd18c1dacfe7666ccbb6c7cfd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV62100709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057967148ff7dc17a51f02cc2fea19feee898af9dc00da58bf183c89aeb7e5f1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLV62100710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ce941d52df5695fd7688c6bb6925543b016076396117a0b4164ae6eac1ec79. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLV62100711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1608e47fb870aa63c68ab6e61cd7759e9af5d036a96420e55a13c7aab0e25391. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2104623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a8acb6372cd3f70a9e09705a72b89dd3918cdc36c6937ac79af3a95f1d1c66. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2104625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7ff66764e38a686ccc9073036a39001b3988c71d99f2c0941e84d81ca57d3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8LD2339764.