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 0x783d725a5b300b3aed441f23894eaf1d6d3177bbc42bdac052ca236b59726b0b. 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/47d992a5-4163-4e42-8149-041ec4c9877c.json and https://artists.proofprofile.net/proofs/artist/47d992a5-4163-4e42-8149-041ec4c9877c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Von der Straße (feat. Suad.077, Jiyo & Nuhat)
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 0xaab91b6f414fa237e446bdd6347a0422c5e3660ed2d16d9ff442248d31f1a24c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEKF22301084.
BONA (feat. ilo 7araga, JUU, Avie, Moel030 & Amo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f32d9b6ebce4b7745a3a9580ceda1d0c86b12bf06d77d0571accec251396567. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEKF22301043.
Nein Mann (feat. Hamdi52, JUU & Suad.077)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51253ca5fe502069a816fd87d99a248bea551fc5c6408dd4b780190e08ec1b0d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEKF22400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f9d6651f47fd439dc2c32a4d12a2e290a6e356d47da8abf22b4f51d1fcc2eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH6542246114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7b7efe3edfaa8931422390df5bf85288841e45801f34490eb622c2fbd4c835. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812420658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd070d329ae1ef7787832a9cc2f50efa97684b6a8bb031759ec85fa0d2fa868. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812421324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f40433fed6b284dd0042d1ae850b6035c0ae3db886f68594a9b54513eeae7cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812422359.