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 0x843492ff14055236db8685d1d9f812eff95671917e246f68e4dda75661829e9c. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6567ea2c-34d4-49a6-b108-2291b6f6bc0a.json and https://artists.proofprofile.net/proofs/artist/6567ea2c-34d4-49a6-b108-2291b6f6bc0a.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 0x6a300e467b1b960021ccabf78b091021e18e7062da7dc7aa03e0303f907aeb9e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:14:51Z), 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/QZPEW2510708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc0b94bd9cc0a07645d9eb17225fa05438d4cac771b630d6e6783f25124f1fe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPEW2510709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fa6e576abf5be2ce7b780c7b6bf891cb709c69e1ffb07f4d60a0f63f1dd4b2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZPEW2510710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab55befe7f80454a96c05f55de1c5d477be4f589a06706b026303073b19a767c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:03Z), 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/QZPEW2510711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee2e0f73ec3bcb8e4429624c4df3ef931a3a65268e01e434f4df47b0f854c41. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:38:44Z), 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/QZPEW2510712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c336194057a72dc30ae785ea6078e8de2acb6926b25434046bea04a850d1ad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPEW2510713.