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 0xc3bd97c5572bb6f6d136883872c96bc516b794c5e1df592e5cd057eda5115108. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73641dc3-a7cc-4727-8067-8e2aca29d857.json and https://artists.proofprofile.net/proofs/artist/73641dc3-a7cc-4727-8067-8e2aca29d857.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 0x444cdf40be44247c9ab1ceb92eaeedaa4117b809306408c16678a3cc9ebac503. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITL011600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba2aa8b72bf1e951af3423c97cf96b9d239fa0d60a0146ac70dd96a617ca9b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:04Z), 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/ITL011700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d6c0b40e1812bc1b2e80c53707636fa5fd4b0261669a8d3fb50072679be7b6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:28Z), 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/ITL011700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b5431d1ddb91e4b29714fc198a420c577b7bf672a0b9678b90393e27113ff7. 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/FRP532200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae07819a8d215a65bd65d9fca171ef23e3d6007f9167f88fd08da054aca4f82d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRP532400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7853f3eda8013e01462c26520370abf2a0f6a3850bafbe4810272232c9912102. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRP532400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7aa3b0b81866310c5326830e681540fc8fcc4bc189599db51213792191d527. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRP532400076.