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 0xa361c661d8eb4317eeb1b4babd476eccd9ab62aca3489f9f87a37fd6cf9f1ba2. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00507205-33a8-4b22-8c87-a9da26e533a7.json and https://artists.proofprofile.net/proofs/artist/00507205-33a8-4b22-8c87-a9da26e533a7.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 0x618c03fc5f3cc787c80e6250f8c212daddb284edd7294c296df47f1f22a9a318. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:52:56Z), 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/PLD990002701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332312c404ce2f4f500af23f8254633fa5dd9a746085994d6aa2e7013124608d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:13Z), 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/PLD990002702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa758698c109600cf01a2a6be3c92d769d4741c021b378cfe21bbe47cde1cbeec. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:34Z), 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/PLD990002703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b785bc9d2254b3d578ab6cb9a34079917b99d27ec49f60c10d5647cf1d2400d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLD990002704.