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 0x9542a118247392e5ff8d29098048c733f06fd835302b44870f09016e0454e8d0. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4bd0a77-5fc8-4c6c-b9be-5fe591ed9304.json and https://artists.proofprofile.net/proofs/artist/e4bd0a77-5fc8-4c6c-b9be-5fe591ed9304.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vuélvete Underground (Homenaje a las Canciones del Universo Velvet Underground)
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 0x7a2f5659393996d66698d66b2ff6b92fa779f228d709adf5d71e4f5cd52a5489. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARNIB2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e84bd3bf0c632bcafb940362cbb8f7344da72f50aec70763c64c7efc9d06bf4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:26:52Z), 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/ARNIB2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51373ca903aa147b96857cd924cc671d7ac0bd9d60d57c49647ed996c13fcdc1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARNIB2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf9e1f1da2519d6bee753c7c86ddd918ea60be1e06586b54f82114aeb75533d. 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/ARNIB2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5ead24b9b915d808a16ef81efa86b39dc063a1325ca41db1c6feffd3ac852a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARNIB2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7ca7f2fbcdee7f9fee1a816b1391bbd754d2fd24bc4518735b4f5eb0954c19. 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/ARNIB2500006.