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 0xcb38710180c27122eb89724ff20ff28517ac08ff93e270152c4f7e0f3dc1432b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4b8a438-d701-47ad-8b36-2fd719e70fb9.json and https://artists.proofprofile.net/proofs/artist/e4b8a438-d701-47ad-8b36-2fd719e70fb9.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 0x9b67ba274eaeea4427fa2504b78a27295127336a8ca0bdc19ee667fc29059207. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:36:35Z), 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/TR0520600822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6399ab6a3b4976875c59c63dde946457763e962f33d689ea41f93d5eb988f6ff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:24Z), 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/TRBFA1700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6c7f7dcaf7e61f1d8be1e6574f3d2ffee264f0df8e1d84f3c63888f86a82b8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TRBFA1700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ab9c4526a846373276559f5a237854c75222c78e18da0f0c9c7129b3bed03. 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/TR1750600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d532450715a49561982e114e8eda869739d8ec62ff84684d7f962f9a8fb924. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TR1750600254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f09b32ee663085dee0ea109c411108f9edc4a78cd8018ff8b92dcad9bcf008. 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/TR1750600277.