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 0x756b2ce6628e034b30871eff7dbb238aeceff3fe14da6bec52adbfcfcba6ea84. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0099b499-36ee-41b5-abec-54c227dfaf44.json and https://artists.proofprofile.net/proofs/artist/0099b499-36ee-41b5-abec-54c227dfaf44.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 0xa07c2735a145a1c8624c1fff83c7313f0de1a190db86e20a53557b19790169d3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZPEW2403551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abf56ba643f9591b828e9335ae38d140fd34d7c023734f68b98ecf147fc4674. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZPEW2403552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968f518f2b7b10d98ca5d1ebe54baf266aea2a6cefa2b73525d7e4331b13ec51. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:26Z), 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/QZPEW2403553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361234244df2b5d755f963e096c0909f10672fa18a2ec5f9fc8765e3ad76a7d3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:15Z), 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/QZPEW2403554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd594625f433ec1d94fb7d1e4c254d8429ef6907795a60af2070be4ce33576b4f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:23Z), 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/QZPEW2403555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4325a52eebeeb0fa2a97cf162b97f7fa0590a50d1c854fca54e613dbdc095a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZPEW2403556.