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 0x3a10b501e14de315be26993d0f38001b584ba56956aba7a932f94feb7ad9d4f4. 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/67929dc9-bf61-488f-bebf-ba85864dc15c.json and https://artists.proofprofile.net/proofs/artist/67929dc9-bf61-488f-bebf-ba85864dc15c.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 0x8ba9bd395c126bfa577cc6dd4498336ded8101050ae7d500eecd0e21f857d0be. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QM7281485023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4db2bde248ed947f56f3f4dd0c45ec313c68466d9ec889f55e646002106fb7. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/AUV401451782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d30109dd5f9370dadf52cad5b186c66bbd3532518c0f7973ec899790171223. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/FR0W61812080.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17bf4fdb9107bf535e9c7e525b5f9606b739380439f930975a15624a1185cbc. 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/GBPS83880130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3401e006379f92c7357553a912b0809e3eb7e1ab9f14f02adc74508c1dce9200. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBPS83880035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449ac2e948d34c5e5bb6fd2c1fbccf82f5680a414ad2d271b900c76c72473f9f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:18Z), 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/GBPS83880120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57f278ee0bb6c712a2649acb5764feb5feddf849fbd9445b53b3a83816288d8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBPS83879990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb2efea60aa14e7dcb1e38b8564eb0bbea4ec672d6108f3c648bd8bdec736eb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBPS83880061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3838a7dfd2d546d4823f2163acea1ee3bb25f07a5399667f4dec616c631f1ded. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:29Z), 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/GBPS83879979.