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 0xc8f2f605ecfaeaf662609ad553102832558ec1d71e9faab841810368107e18f8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fec8f14c-41ed-4cc8-9793-f0d69276af6f.json and https://artists.proofprofile.net/proofs/artist/fec8f14c-41ed-4cc8-9793-f0d69276af6f.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 0x933a95f037eb1ccd87cd9e4d0ea0b7fa4c5e5319f916603e49def6f67de9f736. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:21:42Z), 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/KRC082300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1998ca6d7030002f2491c60393702a60121e2171843c5582587b75491c411f5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/KRA0R1900390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a993f23e3917ea20c8a85ce2c57f2a2a424f7a69838a68b9e52998943cc6fc3. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/KRA0R1900391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe741019ed7d5f8c73508675ca3b56ecf624cd10044c88fb79eac861a672ea25. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/KRC082300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200979a95a09c0ac8af9308e8b21b1d256d013a453f7efb52b1fe8e945a04ce1. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/KRC082500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e52fafd855218a2ab2e182ae9b74564cbfd0b7539aa52b59ed70c64481b6aa1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:56:12Z), 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/KRC082500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f4e2e748467a660e87e6b8e5dfbd91715a3d12e94d3f3eaf32a15ede0eeebd. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:28:36Z), 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/KRC082500014.