thumb|Franz Baumann Franz Baumann (born 23 September 1953) is a German former United Nations official who, until the end of 2015, served as Assistant Secretary-General and United Nations Special Advis
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efdd4b4ffb17c1f8bd05d003aa475a7455c423309929b1b77c124b0fe4a02a5. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f513181e-c0ce-454a-a202-cc98e32fbced.json and https://artists.proofprofile.net/proofs/artist/f513181e-c0ce-454a-a202-cc98e32fbced.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mein Bruder macht im Tonfilm die Geräusche
Berlin Swings, Vol. 29 (Die goldene Ära deutscher Tanzorchester)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8194c5f2b45f89ca0b8b78fed55a2bf91a3e708bc2ca67d35f9c162280dd375c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEHB51251231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85066d4044c3b26e838b729bf44bac1e2d8fa65bbd43568450d467b9e382108b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEA311500972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f465d65d7bf23656e3bbdcd131474f9b0fa5eddbab427ab22605437986a8488. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEC531048684.
Berlin Swings, Vol. 28 (Die goldene Ära deutscher Tanzorchester)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ed7ee998d55836a3ca148c1bfe60ef4454bdc1e21846d426501fb400365818. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEHB51251221.