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 0x57125b022a2f9d44f000db0e1e60fd8b8934cab11b1aa862c4a003f18e5d6c7a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea723b33-ca78-4673-b8ef-c4c054b89670.json and https://artists.proofprofile.net/proofs/artist/ea723b33-ca78-4673-b8ef-c4c054b89670.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 0xcfbf2b2d22ffbe8de5b304f212a01e112a7b0e63a9d94a2bc858d6197db024ff. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:44Z), 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/QZES52072633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb1b1e7439aa75f335f4eae198d45903bf930b63454a7fab14a765d814a81a7. 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/QZES52072637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa1b903888407380cbff21d408ccd7653fdbc51068f82e43d854da398c7f189. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWQ2110732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c67bcef3b90b64bae072bf8105f0d40508b5e4b600a7ee1edecb27f5f9edb20. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLLT2351791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbfcb7af972d7b0f88222919d05c2351b62723d0f0b3be370cd1e2c4e64eb1a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:36:44Z), 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/GBLLT2351793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4716995f997e25e63e1815c0435328a4e72e1a242fc0a1cb4c5beb64361357b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBLLT2508924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e245e3b9f43df14a93d0061c69ea213a3acbed5a129e24459dcb3a0e0ce31. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBLLT2508925.