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 0x7c823886a4ac5c5c5f34a5a44f24104fd1bfcf03a1138c20f0490f9458264a12. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb549c14-9d3b-4159-a83c-1e226a45544c.json and https://artists.proofprofile.net/proofs/artist/cb549c14-9d3b-4159-a83c-1e226a45544c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ballad of the Goddess - The Legend of Zelda: Skyward Sword
Nausicaa Requiem (from "Nausicaä of the Valley of the Wind") [Piano]
Chihiro's Waltz (from "Spirited Away") [Piano]
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 0x2c900b3f472336f5ee86c4c4442ed837e9eae12da6f1eb0cdb1631ce6ae18135. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:13:19Z), 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/GXHZK2542605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf863652f81b65e40d64d967ccbfca2e5e81f3209c507f6992f3e879d267afabf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXHZK2598305.