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 0x4b1a9811d25235214a56e538ae6c15a30ec09bf1da91ca586b8d8afb79106e25. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a07f45b1-c1e9-4709-bfab-d11b21aaacd4.json and https://artists.proofprofile.net/proofs/artist/a07f45b1-c1e9-4709-bfab-d11b21aaacd4.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 0x76b20d2181ae8c7b9cd57e2b162c13d60f70289a2b7b8154267c7c9016818d49. 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/JPS801948534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abd132465b12fcff92966b0a5bfd8bb865dbb2d65564e194531c94a3cbcc759. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:46Z), 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/JPS801948535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e09410e2e0d4639bca9e50807ef9bcfc81be1aca1a64bafa6b06e7496e0ce. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:23:52Z), 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/JPS801948536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f14c7db79958c4922019ab0488d377608a02532fc27813acc49158ce11d649. 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/JPS801948537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b6dfcc8f1f431aa240b07b25340c990773debeaf63ee2389f0b31f656db582. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPS801948538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0821439cdacc25d5846056777ab715d196c018a67d404881e1a4cc2a1100a1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/JPS801948539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb22604e12e01aef3340e905ce2c951f8397f8d7ed869dcb9a59b3ad8fbd740. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPS801948540.