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 0x83da5f830c2f44ecc2e2000bdc5e8c6fe7814d9fcb41a5146522410242830742. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf6d41eb-d461-4243-b9a7-65be13c569bb.json and https://artists.proofprofile.net/proofs/artist/cf6d41eb-d461-4243-b9a7-65be13c569bb.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 0x8249062e36b3ec887403dda3f41f1c6686280298c996c50a4d9d33526aea4697. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:19Z), 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/FRX620895010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6d027dfba7673487009b29209e63eb71c9c03b75614f216b9dc96bd6929827. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:27:59Z), 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/FRX620895020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf841dda9c79fb77887a67d057404de78a15bdf7f76b6b5d7ea66e98f4aa03877. 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/FRX620895050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c2f368565f075a243ede6bea453c1dc7208c4c70ea340927e084f2fdaabba9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:44:45Z), 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/FRX620895090.
Capo Verde terra d'amore, Vol. 4 (Canzoni di Cesaria Evora, Teofilo Chantre e Princesito in italiano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce04bce7a017d0425e776d64b949c5d578b97f0954c518f6198d4d4ca1b2ce16. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:55:22Z), 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/ITK601300905.