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 0x8a992c34d8f988a7d9ae64b069f02bd051b385d2c0ef12a1dade9c2bfe341a21. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec735bdd-b2d6-4844-abc3-66b284a819ea.json and https://artists.proofprofile.net/proofs/artist/ec735bdd-b2d6-4844-abc3-66b284a819ea.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 0x92aa18bd52b165045e6a4ec0ab4419162f064e64f8f3e9d7a260d50de96f7d62. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:32Z), 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/UKQC52000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a8186c54aa41382199f9b5f8115b5da4da8bec230e7b715303be8e94251ad5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IN1SY2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7794f19226d31b58ff945d27cb0cd5987c6a74311c56af8fe2019cb56d11c1c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:18:36Z), 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/DGA0R2431246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4375000afdc397cef2afd41fd8864a7a19ce461a17dfcd64f224a278e9976f97. 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/IN1SY2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6772f52b394bd0c2fd0a8b67246251ba2d3166a83509830aa3d6e622244b6562. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:45:46Z), 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/IN1SY2400003.