Mats Lidström (born 1959) is a Swedish solo cellist, recording artist, chamber musician, composer, teacher and publisher. His first teacher was Maja Vogl, of the music conservatory in Gothenburg. He
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 0xaf6ab04f6aa0d2702c3bd7a72a0e67e2584a33c0e59f9eb29ca7f3b99cc8592d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bff660b-745c-4403-8dea-182ebeac039b.json and https://artists.proofprofile.net/proofs/artist/4bff660b-745c-4403-8dea-182ebeac039b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Lidström: Rigoletto Fantasy - Shostakovich: Cello Concerto No. 1
Smörgasbord: Encores and Short Pieces for Cello and Piano
6 Pieces for Violin and Piano, Op. 79: VI. Berceuse
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 0x5c96b209effa0489d9a444fea24062fc4303dcc68cb4c829427442e5adf7971e. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0118405 — a six-check JSON result.
Shostakovich Doppeltes Spiel: No. 1, Roter Oktober
Schostakowitsch: Doppeltes Spiel -playing a double game (CD 1 - 3 in German)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127f51d63275815d50bc42529a7db3a6bad9aff93bf1387b063f1e1e0fcd58aa. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW72192901 — a six-check JSON result.