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 0x7f2db1ad01b9f99c72c08f4360be7070626c21069ee0ed57c887c9c3d8c5ad71. 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/d040d6b8-55f1-4641-97e9-4651480308df.json and https://artists.proofprofile.net/proofs/artist/d040d6b8-55f1-4641-97e9-4651480308df.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 0x8fc66701c766b30a33c3d4dc59c7e1ba773b7f92c2c2be3e1869d4579b8cbd38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6N2111319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73bf446e497c0a81a93b2c97bfe2e55b8a82f376374b27346c9045d8ed06ae3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:50Z), 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/QZDA42262334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5671e6141b037543ec1f9351f72c5eea5e1035d14a0d3b3fe110803b3848d31f. 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/QZHN82289318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e03cb42337abfee93b81aac39d2534061724baf5d4cd7cdcb1ffa8ab449180. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWQ2280977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbc2f5e17f930b3958950683f05b0755e470f4fb47896797c2202ac5bceecd2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:27:12Z), 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/QZZ7M2422227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7f01798aebd78a89195270837a03e9b1978eaa25b9f28c908fd26b1c296d4d. 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/QZK6Q2502352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3648eda56dd5410817085388b0512707786fa3601cbf02f99f5749d75261be17. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:07Z), 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/QZNWX2571069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fb106f3293e2eaec53eb2f63de224fb1cee4a79b0d1233754671d7a72b2371. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:18Z), 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/QZNWX2571072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa47cd8903d98bb03c9d0a0b5ded40181d989d29809a4bb6aac03ead8aff57c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFJ2511603.