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 0xaf4901156e24a09f7dd4056cf032f1f566f259d52e2e5fe06ad6490a9cd3ae2f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88078bb3-d6f0-42ca-b076-e104bc9cbfb3.json and https://artists.proofprofile.net/proofs/artist/88078bb3-d6f0-42ca-b076-e104bc9cbfb3.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 0x40f32b54b4c5d7c7ad1d8beb43fc2362827d58014af7fa393c04fc0b1f5644e7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZFZ32300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8559014d95df47bb2c435053ed7c4b6a2fc3972c4df559d2e5c4d850002a0c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZFZ32300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaaa80f6f22bf78c81c50922b1053591f16fce2b0b24463da90451694572eaf. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZTAW2387912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1739d492debcdc9e5d13595c42e8ca9366bea235ebe6083f8dbff67785501bb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTB72314460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbfdda7a859180bc29d2bdb81b93bdefd685dcd6998405adbb49b02eda5f76a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:07:13Z), 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/QZTBF2381591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2caa64ab3572211065ec7ea896bebfc6e295814f71d3003c932486675e750d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFZ72463458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab0015c7938cc369b8b4b434ec508d637e5cbd57b74a000aebf24e92e41a792. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZK6P2453130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc6fadaf4ad5e963025fd15112488bf7f1d5ea6c7e9480801f89afe4c17c623. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F32468506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436b1258f86eeca3effa7027f54db510b858992a9eaf2e6e870666b6fc62192c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWX2541604.