thumb|Rainer Küchl in 2019 Rainer Küchl is an Austrian violinist who was born in Waidhofen an der Ybbs, Austria, 25 August 1950. Background He started to play the violin at the age of 11, and was adm
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 0xa1360ab30c8f43c6cb295ddc935f37b22cdb0634e40c448b76e9a3a3f40458c6. Chain 2 (Bitcoin): anchored in block 954028 (2026-06-17T01:08:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a573625-f69e-428b-99c9-d09b2b58222f.json and https://artists.proofprofile.net/proofs/artist/3a573625-f69e-428b-99c9-d09b2b58222f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Richard Strauss : Walzer-Der Rosenkavalier
Strauss: Ein Heldenleben, Op. 40, TrV 190 & 4 Letzte Lieder, TrV 296
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 0x25f88bf3246afccfa60efbe8f83164dacd4433f439ab12563a96f5fde75b5587. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10301180 — a six-check JSON result.
Violin Concerto in C Major, Hob.VIIa:1: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa163255babd02275bfb40a1c397a73c374b381b26a697d166acefda4ef1c8d16. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBAJU9000200 — a six-check JSON result.