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 0xe7b275aee374650483e6128d93a69635d0ec57a3eb060496497b300f3e8ef467. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c14081ce-66e9-4eeb-87b7-7674bc85a0a2.json and https://artists.proofprofile.net/proofs/artist/c14081ce-66e9-4eeb-87b7-7674bc85a0a2.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 0xaeb3c596133e6726fbd873823465d4994f95af8b110e271926825ce53759d707. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCABQ1381866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb8e72c449b47f9bb86def2310a30f697bbb1aa28d63f0503432bd77556e2dc. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:01:53Z), 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/TCABQ1381867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d20f128248c20ae4a567dc6a3841c1c6433ab4534cfc75c6cd70ccab62c010. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:09:04Z), 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/TCABQ1381627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4686c4f356285c33fd1e26be6f101b13867363781786bd45ff5c3ce1cc67e0f1. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:21:55Z), 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/TCABQ1381633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c15d7f8da9f07802d452ede560ee37cd01ad317749180dab18ec36d22d76df9. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/TCABQ1381634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416a314c726f0732fe0c33a5490d75af5ce867f89c23a0e74d24024fd2577279. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCADG1771328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b25f697d163412d053fa984f9ae238aca948dfe461ca39cb36b6aa105f4a993. 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/TCADH1740230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ed24b8009d1cd920eb58e72268571318f85b8a754407935a27807c06c06038. 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/TCADI1701054.