Der Sitzungspräsident – Volker Weininger
{"copyright_id":"0xa67ea9f79f05923012bd5f40b9dfd18ab7bbf502fbf5d71ef1cbd533ccd2e428","name":"Der Sitzungspräsident – Volker Weininger","registered_at":"2026-06-14T17:51:56Z","symbol":"NIM0530209","token_address":"0x6d979e77fb52dd6806964d24afb3327ac37c25e6","type":"artist","uuid":"7ee7e17a-b5d0-4691-bcf0-a034faf947cf"}
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 0xa67ea9f79f05923012bd5f40b9dfd18ab7bbf502fbf5d71ef1cbd533ccd2e428. 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/7ee7e17a-b5d0-4691-bcf0-a034faf947cf.json and https://artists.proofprofile.net/proofs/artist/7ee7e17a-b5d0-4691-bcf0-a034faf947cf.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 0xa1a23e4d42793abb711e6acfea622571aa35fcca65231148334129965b5a1017. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEWE41700447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc74522b1211b7cf8197560b15ad8c44dbef4d54cfe3ee77ab8af149292bc302. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEWE41700454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00398aeb6fac5186055319edaf7b1a49d8595ae9620cd6230157336e9684272a. 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/DEWE41700460.