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 0x6922c2ee548733e26d53dad08c8767c521350184cfbfd7dbb090318237f7cdee. 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/258cc153-4b0f-4d2d-abe8-aaa1d58cbc19.json and https://artists.proofprofile.net/proofs/artist/258cc153-4b0f-4d2d-abe8-aaa1d58cbc19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
HALLO KLAUS (i wü zruck zu Dir) - ZRUCK ZU DIR (Hallo Klaus)
HALLO MAUS (i wü z'ruck zu Dir) - ZRUCK ZU DIR (Hallo Maus)
HALLO MAUS (I wü z'ruck zu Dir) - ZRUCK ZU DIR (Hallo Maus) - Orginal '82 (männliche Version)
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 0xdc69881299e5cc15b1b165272b04665973163985508a7ae9eb76c803943c15e9. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/ATT238200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7865a5e3bbb501a25e642e2914c8395a89f215cf9778608da36b8a93c943ca. 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/DEZ921620120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7865a5e3bbb501a25e642e2914c8395a89f215cf9778608da36b8a93c943ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ921620120.