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 0x8c7f585c3042327c1939c8baf4966a58ba1365fc7014af0f5b24db44edec19ae. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/290c6412-29c6-4faf-87e9-9156415d312f.json and https://artists.proofprofile.net/proofs/artist/290c6412-29c6-4faf-87e9-9156415d312f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lakmé / Act 2: Allons, avant que midi sonne
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 0x380575cf9b4e32308486c91702452c8c1390191435f33c87124f4dc83b0766d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBF076740415.
Carmen / Act 1: "Avec la garde montante"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e01c1a207a702e49f7c9b425558d14a2c2936029fbe25cfa9914fdfc91fe3b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBF076340303.
Lakmé / Act 1: Miss Rose, Miss Ellen, respectez les clôtures
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadc1105abdf254006ba841653b99b19b5ff77b2de45803d02ee867e80ce369f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF076740406.
Lakmé / Act 1: Leur vertu si bizarre manque d'apparat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213f5068915be26a58a5e78ae2634defc9fc900da5d19f24c3cac612fd21c3f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF076740408.
Lakmé / Act 1: Quand une femme est si jolie...Leur vertu bizarre manqu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707638d8ddea04e8cf534b4d336930df92c0ec09a97748ea8c7c71a6a3ab0645. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBF076711141.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Carmen / Act 1: "Sur la place, chacun passe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318d89a3856b0b8d150232df62e630973de7a489cbab1db81bb9316ebccfe08d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBF076340302.
Lakmé / Act 1: Quand une femme est si jolie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62091d83c282312112f7edc1c7ef751c5b4f81be8b53b17d9906a4153bfaa504. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBF076711570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233edba7d7751885e33f31762601e73a6d91dca886dc92efe7d70098b9553b3d. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBF076740416.