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 0x492cdf680e13cc2a39ce06b5b6041947477db29459af91fc8e0b0cac4af54097. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81a0f8ed-5c43-42e1-91bc-d6f3e5e6de90.json and https://artists.proofprofile.net/proofs/artist/81a0f8ed-5c43-42e1-91bc-d6f3e5e6de90.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 0x2e6fdddf487ed3bdf83885b757c2ef2e71ad5b2fdfa32700a284dda6a342f7e4. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USCG60510593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5f6087a7692fadf0b256557eea65871a717d6e1340fa02415cf9e2358c05cf. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USCG60510595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb48620f612f97fab57d82aba714170f2b784da1aad64864abbc3cd4346ca91a. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USCG60510600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e9b15661c6e7d73773e1550775d168651e34d81b954a9c159339434b3d71c8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USCG60810917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9920d01afca5a896243078cb67ca2d28914abb6e4916dd42d6498e7eb5fdb319. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:23Z), 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/USCG60810918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fce05edff55dbd0b5d44c684c44119af54e70bebeffee961db2a5cc33193745. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:03:01Z), 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/USCG60810923.