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 0xdcf545d0bb8627bbf723d6305c943616009e144444f9cc3997aa1631e1a16bca. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2f760c1-e8c9-4ca6-bd95-021d461e7588.json and https://artists.proofprofile.net/proofs/artist/b2f760c1-e8c9-4ca6-bd95-021d461e7588.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 0x0c7c1cdb31e5bc89b2a308021f346a5e2657a644bd3126c0b1bf7ef7a3dbadfe. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:34:23Z), 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/GRL010000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6958de17431e804a00000a82751cd74a69a0d80b1eb660f99bf784e3836530. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GRL010000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bbcd6c2675c037b65e363857ef0ed665569c53687940d601d6d973bcce9aff. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GRL019500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20abaedec036bfd28267607e542be3a21f004298221eaeaf3ca994cbe133fbd5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:43:28Z), 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/GRL019500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49728c7de8f4ec3dc25a71d28507f0519e7a38e428a3a62371ace466966e5655. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:28:14Z), 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/GRL019500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073d9b70f5cea050589da39e1e8c949e8ae3e59e9134633362536ad20b209298. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GRL019500215.