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 0xc71f69e73808159bc8ed7b3446b601466886143620e1e6e32c65069b55bcc6d3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2e2b8b8-d6c3-4c2f-a77a-dd4bc67de11e.json and https://artists.proofprofile.net/proofs/artist/c2e2b8b8-d6c3-4c2f-a77a-dd4bc67de11e.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 0x2a9bd2682655e243059714e06e801102d4801b368e4d55e9e6cc261954f07492. 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/ZZOPM2118881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7b7e8b56fe8e465666973f003100e7aed418b5ddad0e702f471b4c7826d6d. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/ZZOPM2230941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412960c0569a887b9a4ba16bec10568f17a5f0166182cdb5039396e982e2ee81. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:09:46Z), 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/ZZOPM2235312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943aa5a9295d795314b99bc55fe295e33f3174b83e47896ad52bb704478d0097. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/ZZOPM2240023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124e6ea0688a4b8e74c9ce27f6a6e489674906d893da30b2afb9ca881b01514c. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/MXF152400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7172313104a1085ad76725f391eb1a83eb8fef3bc13ecbbc3f650bdab6c604. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/MXF152500864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32033c4552703febc9f6cb858bafd3301ba72e1e04fa3ec99a32043554a4842. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MXF152500255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9d7ded6a04444ac71bfd607f9c4774591891ea87bc4b837eb05c70b0a12f2d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:13Z), 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/MXF152500865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da8d61b5b07d59e88a86dce3262b8102a4b2fe3c48d7fc922c783ca1395027c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXF152401816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97d6d7591f7f487f06b7f90f5ed8b3b07c56724d54605c8839c0fbb95ea6c60. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:21:20Z), 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/MXF152500867.