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 0x3c07b1721c0f82b7584b29046d9f759137afd0952e992fb39a5857cef78c35f8. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06dbeec3-fe4c-49a6-aa49-b929d9d9cfb3.json and https://artists.proofprofile.net/proofs/artist/06dbeec3-fe4c-49a6-aa49-b929d9d9cfb3.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 0x81e81a1808202a7092f83dbe26c8ebdc0eb7d6534c10d573d57bce2743df217e. 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/QZANL1790569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e28d90a03b3e172e24d107bfdbf574a9d3997cd210d19bc161e9e9198c10a39. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZANL1790572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa229f681a631072cfd689b42bcc231779a33232e5bb8a6102888d38dfe0e7dbb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:37Z), 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/QZFZ32261322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc6125b1384a7adae3f951837e81525d25feb79a81306a7fc0c002533607c06. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:26:54Z), 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/QZFZ32261324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e7dabe8dcd29f8910af69e3c75af6c3c78164ea4c8a236c17a7c777ec15741. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:56:14Z), 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/QZFZ32261325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5a504ddf2ed061723e678dfcf5d0662d8f73c51464d4f61b63dadd294c13ec. 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/QZFZ32261326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48a993f4758c07090a153f2382833e09e80d1d94683e14cd99f6bf8a4444b6d. 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/QZFZ32261328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179d11dc5541ca6503156bd7a4d117c75b9419c01b57164f8a8848c910488d66. 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/QZFZ32261330.