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 0x503b9e7724a078df099aca4d93a986e41aae52abd9ceeb9c5088592a044812f6. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d42dd65f-03cb-4f8c-a995-4de6f7af49de.json and https://artists.proofprofile.net/proofs/artist/d42dd65f-03cb-4f8c-a995-4de6f7af49de.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 0xc0e5451daded6bebcb807bd597c6bb338c36ae75f900de62dc42d1f05df15230. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:31:57Z), 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/QZNN32126918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d7fe2fc87ba42b1a05996e55a12fe3d5f3a7ecdbfd4aa4a12010b3456c95e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNN32105943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd08bb1c3b192724517eacb4020b60913ae2c1d909e84ca7d4c862b0aaaa27f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:40:00Z), 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/QZNN32105945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df82910772a7de358bb88f0ba3447e1761f860a86b1fb9d96b5252c987a81c6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:43:21Z), 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/QZMEV2328573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cdab2f06684b2f4e84a754d258b445520df162e9cb2b441a6ff496caeb8730. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:53Z), 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/QZNMY2472927.