Hoffmann is a German surname. People A Adolph Hoffmann (1858–1930), German politician Albert Hoffmann (1846–1924), German horticulturist Alexander Hoffmann (born 1975), German politician Andrew Hof
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 0x385709f5d4de5b3e363b8e49b7a9307632d94e0ec501cf2b15b4c2bcbf68de27. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ecc525c-0080-450a-8603-34911ae02c1f.json and https://artists.proofprofile.net/proofs/artist/9ecc525c-0080-450a-8603-34911ae02c1f.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 0x1f0c09187c7bbdd6e95916c1ec83fb60067d4d98df7de720cc6be27b162e4ee7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:41Z), 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/QZTB92543294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2ff00205395faafeb5938dcacfb7a16a91025c1929bba88a876ab52de25878. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB92543295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07dad3a8969d3d8f565df6bb8fb7ae3288efdff0f4149940c1f0e68344fd7b9. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZTB92543296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182ba5cf11c7879b21130c592023fcece0afeadf29630830c1adf22844e91645. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB92543297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884464d8758c84dbf88e00aa7981fcbae23ce969fef4e061781d3644d35b2343. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:30:12Z), 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/QZTB92543298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee06efaabb6497cc45239e17ac2a338045c7413ea3ce7b684e45c3f2a922bd1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:40:40Z), 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/QZTB92543299.