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 0x9c481db89189cdd0e0d95be8722f281337d83104f54bacaf11e73e25f4c3f876. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f38b2a9-7dd1-4690-99df-8f174c4b64f5.json and https://artists.proofprofile.net/proofs/artist/0f38b2a9-7dd1-4690-99df-8f174c4b64f5.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 0x2f9a66fac189ab682de67c750a27f95ceb974dba6b8b3c6e2c6491da5f875969. 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/USA2P2310568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36908ce477040166676007b3b53ac91b92f705adf98289669937ad560451380. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:00Z), 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/USA2P2332725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbcc37ac8a2640750ebca56b1f5ef2e13d312303fbdf2a3e6cfdfcab07b2586. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA2P2351950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb814c1b09b16ef9b69f7e62c6825a819b94f33fab2d1eafe1abe0071077fddc8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USA2P2351951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25662ff4d1ac84068a91b78590d3c8ff7fa2b01b94a7b3e9fb3e912032b74a41. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:48Z), 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/USA2P2351953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0320eb7e789297cb23928ad2c2bd9865dcf001cb82a37f1356d0c73d4ab346c0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USA2P2358882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05afcdd823c858f40460ceb6c9ec4146eeed24f257e61926dafc0db0c549566a. 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/BK4DA2436270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997ed64a4ff70ac5c6ce7a7030042afa2d3481ac52b0b6e6cb560205bc4f6493. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/BK4DA2551099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb591b93181d59374f57adf32539b82ef7274fcc11e8255a117884346557e17e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2502013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3345c353a0a4350ac0567f51808bcfffb9cef07b199ce79840b9812face8b2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2464303.