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 0x001f701cafa78323e9c1e1b7c9629f3b3bfc10c249a2d583cd3e099e5708451c. 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/baf77945-616c-46c8-8aff-4d5e08819fe7.json and https://artists.proofprofile.net/proofs/artist/baf77945-616c-46c8-8aff-4d5e08819fe7.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 0x9f9d87125fc043f1bb06c73df71b7950cbb7e72f1ffb97c96916dbbe1b2f8849. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:20:22Z), 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/TCAFX2175990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb38c3b75b4f3e8a3cb548cafd743e730c209501db5fc7bf9e5c85c29d0e8cc6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:53Z), 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/TCAFX2175993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c5eed6d89cf1b5c8baae89cfd70d69d7cff443c958c55c97207f6f8dcb623a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:39:07Z), 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/TCAFX2176001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b5f5286d9637a786fffdf217f99c0da71f456b0ab2f931bfb4b1f3ff6c5b6b. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:33:58Z), 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/TCAIR2402528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee4ca558c8ece2f2009367ff485dd629038e668df1b3cc80abab287ed9e59a1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:50Z), 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/TCAIZ2454169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed254d774fb5ca1d75d4229424be28413578195113f4805c330851b884cf5d0. 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/TCAJJ2519746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109be3e86fccfe59c2fa0f8dfe5c3c55f16fa3bc905a0ffe6ddc90f97d56033e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS8H2108972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbc3c98ba68ba64b1ea324bad4fdcf21abf30ff3543c992897fd218c6eeeae3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAJX2547927.