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 0xcf49c1b555a839c0e7f54e795a358e6d594f2d5f165016380c42893202de59fb. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a7689ca-a907-42e5-a0db-1984dd0d84c7.json and https://artists.proofprofile.net/proofs/artist/5a7689ca-a907-42e5-a0db-1984dd0d84c7.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 0x631b280b3cf76e2b138223b1df82a2ac6237a52a706bf782352ad8df966d206f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEK1980931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6105074a3ca0cdb3219f79079cf474b69fe717a8b426705d8ac03217e0437149. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:41:52Z), 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/TCAEK1980936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca50701dc8f68137fcd660c97cb5a1d5bf39632abe70ebc299f1e7b03b8df9f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAEK1980949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28233772a2e4aeeee0ff111224bc2ae76e125ec7d82e1b77aafcb24d56864953. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAEK1980952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4ae4d2b530a1487a45e77ce86299495933dd7d9f42f46e21af05732f2c11e8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:19Z), 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/TCAEK1980956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d0ca09101977408e33f215958f1f14198d42c3c287a3debd3796cea69468ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAEK1980970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd1cd666bcde881fd344a2a24025a852a597ec72c6aadff3bbf35301ca81622. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEK1980975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7823c8cb006e317f3469ce48262c8b921fab09255d6b7a1ea554f00845218696. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAEK1980979.