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 0x7c43c211be10537f8e180218e2c6ab055cf49c5bae1cac5b3b1b06d3ef58bcf4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a606c7b1-e8ca-4a1d-b056-044929b61430.json and https://artists.proofprofile.net/proofs/artist/a606c7b1-e8ca-4a1d-b056-044929b61430.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 0x1728be3b298e83c16772b4c404516cb1fcefaa563200f9bc659449988385f0c9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZPJ32395321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeebff58cf31c336afd5e2ea72675386350fde5dff1a287180d4b3ad9e6aa062. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:24Z), 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/QZPJ32395325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414252c4f58614ab0f838463d84d547d175cd928a68f42d155857c05b1f8d846. 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/QZPJ32395326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbd514a7a9c6981a8193cfeb5404782180e7b45861df11077a4a9cc7debaf1b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZPJ32395329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39572a6444dc48f37b02d1f753d9bc1aaf01fefbc4286efc99c05b672b0f648d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:29:34Z), 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/QZPJ32395330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5075ad8ec6c2521011080f770737e2231bb2403c8fb824d3310a28f7dd2b29c0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZPJ32395332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3b8d04dd8e51671083bc1fa406605f45e57f3c586a5ddb904c54c4c4c94b3d. 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/QZPJ32395335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6913a93d512ab3542942ae3631d4de661cc3265edae85b1df2215d30b65e52e. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZPJ32395336.