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 0xca341bd520930e829bfac4292cc8c3a393f91da6a5cfc6fced20c0a01823e189. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8e55334-622e-45aa-92b9-e4ca9b8f38d6.json and https://artists.proofprofile.net/proofs/artist/b8e55334-622e-45aa-92b9-e4ca9b8f38d6.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 0x6a85ddec289fdc744238737ea5e90f22666efc88e03bb811d03fe99a4758a72e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UK6ZM2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74ba2a23e05d87c5046b2b165faaf7b87cef044dd63d11d2690dbdc5ff95e43. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:39:18Z), 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/UK6ZM2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3507011c699d8864f23c9320485329ef3b70f3569e5ab55fe21aed6ff446909c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DK4V62400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b300699309f99d5cde7c6bc573cd1feabbe1f36bce9cc627e7a705c56aac634. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:29:15Z), 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/DK4V62400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa700a4bfd8d480af810d486fbfb1e5a2e721fa1cd3d9802355771b4b4d6844c5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DK4V62400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ed35bc887f67f7b994f04a2d077e048e91b542a3a95139b24452275aeaa2ee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:54Z), 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/DK4V62400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa700a4bfd8d480af810d486fbfb1e5a2e721fa1cd3d9802355771b4b4d6844c5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DK4V62400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69840f7c52fb4556cc54e7621041550224caaa7381db511a99ee015da1d1c2bb. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DK4V62400605.