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 0x0c5f7b6c52155e212495dcbc21598404fc3422aa7d9eacb63baf49db251d2d6d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecbb1bf9-7056-453f-9dd6-eca4f81d73dc.json and https://artists.proofprofile.net/proofs/artist/ecbb1bf9-7056-453f-9dd6-eca4f81d73dc.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 0xeae78705ab515e78db66bb620131910cff2b117cf9327d704f44d26706dd8afa. 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/USALX0502061.
In Perfect Stillness, I've Only Found Sorrow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f80616efca13c8ef02a711be8cb5ce6d32edebda28d1dfa1dfc9d0d87d66f3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:00Z), 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/USN681510017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1df35b4be2f61482cb92c34cc90d7a44a210a33abe41579b227b15ed48c7ff. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:40Z), 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/USA2Z2401885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34768f289a3a29a91331955f13f2ec1d05164fd7598227c6322a2b2b917c6e2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA2Z2401884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1df35b4be2f61482cb92c34cc90d7a44a210a33abe41579b227b15ed48c7ff. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:48:18Z), 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/USA2Z2401885.