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 0x00141a373978c90f2a1639aebdceb53033e5a0f1f101b8812430d70b94d9330b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7072e832-2f3b-4d75-af3c-82442bee389a.json and https://artists.proofprofile.net/proofs/artist/7072e832-2f3b-4d75-af3c-82442bee389a.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 0x5e2edb229eb6935b7ae2d7170314d4821aabdbeda7f00fc001fac9868ccfaa43. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6Q2572472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333d4c9a4033b23b0a0e147b2b9af5cec6bd2826480844e1813e0107cdf74a90. 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/QZK6Q2572474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606b216a1c8b909023200bae5aa5dcd643ce2996a681016ddd4781e3b00725c6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:55:08Z), 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/QZK6Q2572476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0f7585bc4d3cb56daa52382336546ec4ea0cda3247caa1d2784c634f303b16. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZK6Q2572478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5b16edbbadf91332eb75034aac694806f39720cb248d68e50c0aba66038f7a. 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/QZK6Q2572479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeab14d374204c7b1f18a2212c862db23fec711404adbc8db3bdc5bc4f1b677. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6Q2572480.