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 0xe06f9bf0c69682607059a661c1c0137f4e7e8681072ae43bd99daa78f8a94308. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc1b1241-8435-44a4-8f3c-1409f22437c5.json and https://artists.proofprofile.net/proofs/artist/cc1b1241-8435-44a4-8f3c-1409f22437c5.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 0x9324a1f05ee555daba8cb379e343789580417946b1e4d9f0a35bde5776235401. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:02Z), 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/QZFZ22083554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5409cd087ee41d9bf7decf33defd6a7dad64114714a13dcc3348593b77283277. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:44Z), 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/FR9W12110490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d245b192da248457021e495086df0e30d4fe27c111ab83e7e17ac09918c8cd3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12114881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b8e3653d69b935a6a39ed0c161312a1f7da55d4557a6d7af64a66fc58c3bb2. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:38:26Z), 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/FR9W12118957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e86f5e98908ea6729811261506fd0cbac9b7a108d2e8bd2fc083cca82de8e1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QMFMF2110061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf67dc84933766f07c6e81bb5ab5de9a3c3fdce2590eeaf3bb1d281bdcbf73e9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W12138007.