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 0x01f72b7fa61c103abbec6b16adf0076a82954791456cdc66de23ae7140f52272. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94895801-0980-46e0-b578-ec1dfea89922.json and https://artists.proofprofile.net/proofs/artist/94895801-0980-46e0-b578-ec1dfea89922.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 0xcc2a10caa776c1219527ebea70c8a79ac504db1df530471792eb879a822848b6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:00:14Z), 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/QZK6Q2012558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227a50013ad164cf9199d3b4099104ec623573243e89dbe317af3b36b63a00b8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:52:08Z), 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/QZK6H2024074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2a10caa776c1219527ebea70c8a79ac504db1df530471792eb879a822848b6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:59:28Z), 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/QZK6Q2012558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508abc226227633e4dd28df68ffa5e19523e6f4ec25b8b7b582bc8b5aa14b251. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:33:26Z), 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/QZES81804372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227a50013ad164cf9199d3b4099104ec623573243e89dbe317af3b36b63a00b8. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/QZK6H2024074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca13a0b152a9b2378775f84e3da6c71d92ebd810297648bd9b61e0c54748c44a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZFZ62547336.