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 0xf4b9c0e95e6ce781f3f7266c8b8dd870c57a418f86a78ca8abcfe340406702e6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fde90f7-39b1-42b6-b85c-077060e214ff.json and https://artists.proofprofile.net/proofs/artist/6fde90f7-39b1-42b6-b85c-077060e214ff.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 0x93fd06b989c580bd89365ed99d9b6e32100cedcdcb9946aca47c0aaca1c0ba38. 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/QZTAS2475794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8232314ebe25e0ffeeb354d76cc35d3f1e6634a39b919f793429ece7ac1bf61a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:12Z), 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/QZTBC2463521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3142c2f765c71c86330374e43410b4868d7dbddb1d2910d9c812c99bb403116b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:10:53Z), 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/QZZ7P2436876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1461046f47a1f815da7dbcb146d2fe1d60ba2b608420b64057f3869ca639f12d. 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/QZDA62553923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ade6323a8c09e2fbf582ae3249dec2d30a7f5ba6d0ffa2d0973c0e9f8bf3c3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNC2553039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50b8fbf18824e8a51063eccec98387920303bca33118f17885245ad43ab64f4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWFT2533019.