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 0x2b58168cdb413d5b123d3cbf8a0b4e4e29b489b8849cc96913ff00a5371d5d11. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63b201cb-f039-4c19-bc44-56285203b994.json and https://artists.proofprofile.net/proofs/artist/63b201cb-f039-4c19-bc44-56285203b994.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 0xdf989067a7ea4a7090e726821d328ebef0011f0dbf976d167cb294a21ee654cd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6F2501350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0698f7a1576e144dc286ca1c28d7d82e8e11f1e06eca178ff4c219ce8c047a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:35Z), 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/QZTBF2530221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8643ce7d60ca5df5a9fbf5eb8be9cecaa8317b268e64baa22777e1c22daaa8b3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFQ2581953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9042f0a0b7afd9022ee602e1394533d7e14f5022b7a8b8f0b3cf2d205bf6f91c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7V2573026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fa5544ae8a8e074dab5ff48b5cdc8c0d96ba56fc6eacea42f3d0315ca700cb. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:34:58Z), 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/QT3FF2564941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26487be26a0c781b0cc92d4fa2d2cdbf77509fb7c20769c3af50fdd88b6d6b06. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT6E92579562.