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 0x8af47fc08c14fc0ddb70d6638172e78474ad62d10114b02510ddfa9dbfe577dc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81180c2e-eb58-48d7-9528-7a038e436c6d.json and https://artists.proofprofile.net/proofs/artist/81180c2e-eb58-48d7-9528-7a038e436c6d.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 0x6f6c6cdc38cfd33d85b95c9d756dbf22e79c77066509cb234433082f0f0206e9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNB2003744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef7cf40442165063d49ed87b47567e6e01cf0f0b1bf37503d0e4bcdb574227a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:36:09Z), 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/QZPLS2197864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a5f1120dde25a180b30a9bec408654112aa8c8f8eaeda4ce9194d7e1fbdc7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:46Z), 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/QZTB32252389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d911bf6f1f92890b84ecdc2a5556b2c0e0a6dc6adef7e291a41a82df56e07b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES82306260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e33c39f24ffe313f95db73e8106aae576b6c7ccedd1c75fd3ef86b6202f3160. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN52300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce08d3a5faf037bd05c662266c3daf752b9c82eb4cf0b7b5ca118590e64c9d0f. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZMEM2353233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f4d74a30d361ad23385170046e239664e0dad2c06f0f1f744dc8aa957596e2. 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/QZTBF2308863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0fbb0834a08402ec9d53208ba0e985f8ceeb68afd8e76d1e7e1b0d9c4bde59. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:53:43Z), 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/QZK6J2556970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb8f82754099ad4d13784c1fb34857378404accafd6e41933ff14bdc4528909. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWT2574956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e13c107217864c948393d83e07274ee8358874c2fd7716cfa257c053df6e73a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:03Z), 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/QZTB52544005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e03a09dbf7359b71d182e2143d8441ddf613f186bb36a4e8b2182ce1ccd5b8a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3EX2548063.