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 0xe83ab0390e4ea228bea3cf43e61bf3d22a50b4865a88e9feef3ab1235499baa2. 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/741953a3-ba67-449c-b1e3-1181288fd115.json and https://artists.proofprofile.net/proofs/artist/741953a3-ba67-449c-b1e3-1181288fd115.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 0x9b5e06fe32b7db531420620eef553f222ff6ecddb89d32a9aa9da79699e254ef. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:46:20Z), 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/QZWFM2317001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1275145af5a7459d248dea727c7cbf7aada18ba82c46de2b47626cb7a42d69. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN72406026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe157f0a4889c7bf727a048d8df8dce5e2a405ecab1ac1efc91a448a8db745240. 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/QZK6N2461923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4680c4e4003c53326be6a1972820d8d59df104903a94904abceb6fd5f22fc4ea. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWT2456430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547240a47b324557d0cb3228a02af460a66294f84f83d2880094456ea5dd0772. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QT3EZ2407402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf940ac35438392436a8842e8d92d284fcbdd74455c7d800f31ad2de2e834e867. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:36:56Z), 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/QT3EZ2407403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8481fee4cb4b165182e7abde749a0959b9d0751b3b1107f5c8e278c65ee0b5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3EZ2407404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ad3e9fe5e9a8714dd26030ee27f7133763595cfb472df516fd53e88486cb7a. 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/QT3EZ2407409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d1019615e6644cf46baf733e1dfe532fa9c78cb0b6b6c033a407032e046619. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWQ2568107.