Outi Tarkiainen (b. February 7, 1985) is a Finnish composer of contemporary classical music. Tarkiainen grew up in Rovaniemi, the capital and commercial center of the Finnish Lapland region. She studi
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 0xeedd40779b851e57f5f964473c55f53bf8324f48b13460c2ce154778450dd725. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee898026-90bb-4f0a-9973-59561dc93394.json and https://artists.proofprofile.net/proofs/artist/ee898026-90bb-4f0a-9973-59561dc93394.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beyond Poems: Chamber Music of Outi Tarkiainen
Outi Tarkiainen: The Earth, Spring's Daughter & Saxophone Concerto "Saivo"
There Is More Light In This Room When You Are Here
Outi Tarkiainen: Midnight Sun Variations & Other Orchestral Works
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 0x430058320eaa414bda4b7e8f3e25a307967bff1b836d0423ca38ed621e8937c7. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FINDE2300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa06b6bf496e32981bf89d6f4a7af913808ffc912b5a5b1a48aa002e72e24c25. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FINDE2300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4535b63e425148481efd96e3dc057a402e534295d39cdab5fb3f72502006522a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FINDE2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deac2c6fb5793834b2d8c9fed61a3ef5d62c51566984cd49c1984e46ebb702f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FINDE2300219.
Milky Ways: III. At the Fountainhead of God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275b2820bd650d98f28b014e9c435537161cb54f392db975c970b659fd9cc738. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FINDE2300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0e9380dd29b7ca76f4d13b51ade8302e5dad9cfb9d9bca16f4f13d0b398193. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FINDE2300221.