Mikyung Sung (Korean: , sometimes spelled Mikyung Soung, born September 1, 1993, in Seoul, South Korea) is a classical double bass player. Education Born into a musical family, Mikyung Sung first s
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 0x64910c032563f98e502850a6fda5c6a71b9578e32194240bcb045b66e7a74031. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b9e0802-264d-448a-9c34-a2edd0a62c34.json and https://artists.proofprofile.net/proofs/artist/5b9e0802-264d-448a-9c34-a2edd0a62c34.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 0x4c9d75cd1477646f6f3a8abf8827a15cea936f3e6b4aa4d8c18167b1831f8173. 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/QZLYT2300104.
Montag: Sonata in E Minor for Double Bass and Piano: I. Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf462e960e0707033b65ee1129d8248c5e1c9e0a1f33bfdd35da2c714bcab3da7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZLYT2300108.
Mendelssohn: Cello Sonata No. 2 in D Major, Op. 58: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2a38b05536b0d7d23aab1317c3fe0b90878d947b6fe47b6a2e28d81717b4fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZLYT2300113.
Franck: Sonata in A major for Violin and Piano
Franck: Sonata in A major for Violin and Piano: I. Allegretto ben moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd381e775219e3f756e73d3a9c8a3378570c993c2185fb1f28ec49c7a61a7cf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZLYT2300116.
Franck: Sonata in A major for Violin and Piano: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13e9a3245cbee14d93f541288d4d9528a1273c6f504f6d1c881525d7ca701fc. 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/QZLYT2300117.
Franck: Sonata in A major for Violin and Piano: IV. Allegretto poco mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d23cf2273bbd1b5fbd193e92026534306271bc79b98447d786da2ed8742348. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZLYT2300119.
Rachmaninoff: Sonata in G minor for Cello and Piano, Op. 19: III. Andante
Mendelssohn: Cello Sonata No. 2 in D Major, Op. 58
Montag: Sonata in E Minor for Double Bass and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf462e960e0707033b65ee1129d8248c5e1c9e0a1f33bfdd35da2c714bcab3da7. 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/QZLYT2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d75cd1477646f6f3a8abf8827a15cea936f3e6b4aa4d8c18167b1831f8173. 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/QZLYT2300104.
Hindemith: Sonata for Double Bass and Piano
Hindemith: Sonata for Double Bass and Piano: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd85242de1b7f5011cf67e84824c9b0b2f2331b387f9eb22bcfcc71a7e76117. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZLYT2300105.
Hindemith: Sonata for Double Bass and Piano: II. Scherzo. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e287e8295610a34f44d97856cdfc095efd621ef75aa03bf6be18ed0a4aff4. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZLYT2300106.
Hindemith: Sonata for Double Bass and Piano: III. Molto adagio - Recitativo - Lied. Allegretto grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7faff1794991424cbc88fc8b368ccf494b9b28d3d87aeceddb2dd9ee4606f2a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZLYT2300107.
Bottesini: Double Bass Concerto No. 2 in B Minor
Bottesini: Double Bass Concerto No. 2 in B Minor: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b3689978d9873faf22e502989135298f44eb645fc2a7e69c73ac4f22f17c61. 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/QZLYT2300201.