Klaus Mäkelä (; born 17 January 1996) is a Finnish conductor and cellist. He is the chief conductor of the Oslo Philharmonic, and music director of the Orchestre de Paris. Mäkelä is also chief cond
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 0xbaae6f0bf032b6d1739a8b04b4b385dfa4de82429b140467fa5659baf5ec12f8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4262a6b-c3ca-4060-938b-d8fb9a4c4d83.json and https://artists.proofprofile.net/proofs/artist/e4262a6b-c3ca-4060-938b-d8fb9a4c4d83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Petrushka, K12 (1947 Version): Ia. The Shrovetide Fair – The Crowds – The Conjuring-Trick
Stravinsky: Petrushka; Debussy: Jeux, Prélude
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 0xd0d0fd0346b7f8ff79b1e49e33eedb21b2ba1244896c8b4cbba2e4401b0330f9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBBBC2400059.
Petrushka, K12 (1947 Version): Ib. Russian Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15c5e7669c88030c25ca49e550021eacf497da5a194be723ec75c760e33f683. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBBC2400060.
Petrushka, K12 (1947 Version): II. Petrushka's Room
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd224255ec18443a3c3abde4572ec239e91c0b6b1826787656a48477a8c40f29c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:08:19Z), 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/GBBBC2400061.
Petrushka, K12 (1947 Version): IVh. Death of Petrushka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c36560aa3f469501a26cdae48ab414fe8402746a7bb7d0d650cf9cef1ce8a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBBC2400071.
Petrushka, K12 (1947 Version): IVi. The Police and the Charlatan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fb0bfc9acdfd312d0ecdb76e0091ea88b44c97b14fd981e5693c55d3b4f863. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2400072.
Petrushka, K12 (1947 Version): IVj. Apparition of Petrushka's Ghost
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61dde1de37ac606eaafec3f10441b2a5db8c3eb82ba3ff6fb23cbc9b9a3a67a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBBBC2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aea104dcb3592a567e34e9d1af4f5bb50a869fea8c3c248f4423f03500903e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBBBC2400074.
Violin Concerto in D Minor, Op. 47: I. Allegro moderato
Sibelius: Violin Concerto; Prokofiev: Violin Concerto No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836911612ec0d3d6d98c4aff93128ffa00513adc4539042e2e23fea8c99f6cdf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBBBC2400109.
Violin Concerto in D Minor, Op. 47: II. Adagio di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fc5b9c83a792d798d0322cd4c076168156255b6e636dcf449cf1ef349a2f5e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBC2400110.
Violin Concerto in D Minor, Op. 47: III. Allegro, ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2178dc8a3e0948ae2d09eb4c3c5652a2ba00f5352098b4d6abf8fbfe0e4b099. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBC2400111.
Petrushka, K12 (1947 Version): IIIa. The Moor's Room – IIIb. Dance of the Ballerina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89ede1fdda606be51fa29ebb2cef29aa319cde2d48360ee5ef0bea76286b110. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:59Z), 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/GBBBC2400062.
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
Petrushka, K12 (1947 Version): IIIc. Waltz. The Ballerina and the Moor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3bcd3b279132c98e3bbeeb3849119b17a687ed6a4d64328d2bc42498423914. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBBBC2400063.
Petrushka, K12 (1947 Version): IVa. The Shrovetide Fair (Evening)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86707ea32b19fe9a5d9eb8e13075fb42ee95ded78cf85dd97837b8c80e41ed3d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBBBC2400064.
Petrushka, K12 (1947 Version): IVb. Dance of the Wet-Nurses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc86c6da5b5dec4ff147881f9a702aff23909932c14e868064caab9c3d817e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBBBC2400065.
Petrushka, K12 (1947 Version): IVc. Dance of the Peasant and the Bear
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2a821140a2fe60638c733631288bdb809b076b12bf15d33abd01cdaad37e69. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBBBC2400066.
Petrushka, K12 (1947 Version): IVd. The Jovial Merchant with 2 Gypsy Girls
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28f2cb631f8e827444e2e399aca1a27ffedfd9df9e8f1f6df97dbdcb6a76a7d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBBC2400067.
Petrushka, K12 (1947 Version): IVe. Dance of the Coachmen and the Grooms
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce8e56b32905031417a2984a0922b640b0db8ac4a404493bf86f4f514140577. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBBBC2400068.
Petrushka, K12 (1947 Version): IVf. The Masqueraders
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5246c46679dad3c8cd7f76275d8bf292d1d342e9508e07ffd53a129a755c04e2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBBBC2400069.
Petrushka, K12 (1947 Version): IVg. The Scuffle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba53fc955ae14a98796d247be218d86148813c56d78b640abe83157e236c60. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBBC2400070.
Prélude à l'après-midi d'un faune, CD 87a
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dab1d2a4f60b26f15a1b910fd73b64e2a15a16a8f836e0a7eb5c75f030b24e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBBBC2400075.