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 0xd8891e4cca30aadd29936eb4da0f8c89b16e980fad5ec10dee8f97178858a260. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65b26fc6-2dd3-4843-8661-a298dd0e32d7.json and https://artists.proofprofile.net/proofs/artist/65b26fc6-2dd3-4843-8661-a298dd0e32d7.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 0x4a78a6c97d629f123b5c1c837532aa412f203fce9e683c2c492fb3a31c9ecffc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZS652473915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013fe61f2697440c25d1438cd62d8c0a82581f0b4c4d632c42f63bc5895ed584. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMHL2432009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f14cadd23c72b64420b872b7b7528dc994bf4e890cf63d48ee6cde6ae151b3e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMHN2456600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d74e7ba01c4066189c59d0b9f1a9b66cc2f1d8be69176ab76035814668a28c8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZMHN2477300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a273ea052e6bdfc52feb157bd57f74ed0428b0c190cfe1855d86f7ec1343996. 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/QM42K2474770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e5707a5d27bf8f7083de6d467398d294280b1d5298fbeb09ddd59247c6e0c0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS662469367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e66f321579c7ccba91f3e621381f9659dd28210900c1728de464ef1ad5269c4. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZS642444121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb707ff2ec49f16b5f8784022d0c9d809539203bfaf1f4054b77d3489fa6824ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZS672423710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a131f3aec4549a96cb5e9cb4da3655cbbc1fd93e127e1a6a5d056e4d472a8d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:29Z), 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/QZS662489109.