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 0x0b76f5dce45f7f99fd4a80767b61bdd824939adee3cf70945c2a875f921ddf92. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0824cb0-4e78-4d29-87c4-48b88d3841fb.json and https://artists.proofprofile.net/proofs/artist/e0824cb0-4e78-4d29-87c4-48b88d3841fb.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 0xdb9bbf70ba7c4f33ce6523543172ef67f7e14cd0910f9c775713a7f77562074a. 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/US35U0893701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0603ee7a6d10f41cd8c22fea2ae8cdac14236850ec3505cfd61e6a23c83386be. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:24:20Z), 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/US35U1417702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a87a9e6d580d4273c1f5582435288fe18059fc5cbc50337090e2d7eac6ce12. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US35U1417703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa957b69ba6cef58f63bd218b4d013a9e9249d6a96d01e6e702dd7c986f262bf8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:16Z), 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/US35U1417705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcc2924062116c5b6ab050167ff748af3307fdfc6f1b4289722a6e841b765fd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:32:22Z), 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/US35U1417706.