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 0xdae20f6dc6e7837bcc11d03a617fe348eb0cbcf64c8be5128fe6bfd688cf7371. 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/c16ed601-3dc7-46b8-936e-9b527b443088.json and https://artists.proofprofile.net/proofs/artist/c16ed601-3dc7-46b8-936e-9b527b443088.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 0xe99e7a20502999536d5a420f28d511b1101be024252ec5a255f3ea0ea35d8558. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEBL61099919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe459bd033514415d87bd06e83278f9a3eb590b80bfdd9c36cad0162b8a98ece. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:58Z), 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/DEBL61099920.
Giocantare (Laboratorio musicale per genitori e bambini 0-36m)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1b5eaac0e34e7433ae47061a1c59572367dad74bbf14cbb081c5760e29f09a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:53:23Z), 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/ITZV21200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbb1a83c276c1745cfc9ddab476a755cb055bf2fb304c6e2f49296c8b6f64d6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:05:04Z), 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/ITZV21200025.