Tiffany Poon (; born 29 December 1996) is an American classical pianist and vlogger, residing in New York City. Career Born in Hong Kong, Poon began taking piano lessons at the age of four. At nin
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 0xefbd3a4c7f8808dc7c32ef6e2f9e4242b32eac70c6f79c92df29eee906cec566. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67479fc0-82d6-4bcf-8f03-a9de8db3408a.json and https://artists.proofprofile.net/proofs/artist/67479fc0-82d6-4bcf-8f03-a9de8db3408a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x29a467fd68f78110a6352bf51bdad68279c97d3737ba03fe0c588fa190a6817a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USHM21410839 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b38ecf73cee26c8e21b638f77a5c21943d4018e894d225aa66ba2de0b7def5. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USHM21410840 — a six-check JSON result.
Hungarian Rhapsody No. 2 in C-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13513e06232edf98fa3daf1ed6e3f4e9f10bac4ae260c830626c384fc2de8bcd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21410841 — a six-check JSON result.
Suite bergamasque, L. 75: III. Clair de lune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b494ae6ec395a4c166c484480e7f9257a83a1730332bbece0ec7b0abb2f7e8f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM21410842 — a six-check JSON result.
Piano Trio No. 4 in E Minor, Op. 90, B.166, "Dumky": I. Lento maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3655e38d8914a975670f12e9e602b7dcac600bdfc6df35199f68acd9e591374. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEE862200656 — a six-check JSON result.
Piano Trio No. 4 in E Minor, Op. 90, B.166, "Dumky": II. Poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81271fdc3deb399806b0340b36d5e859b6ed7a46d681cf3d6dc163e6aac2a0ca. 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/DEE862200657 — a six-check JSON result.
Piano Trio No. 4 in E Minor, Op. 90, B.166, "Dumky": III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9973712184d65f7dac6412b3c69f7bf5bd860118b75ed7beb6320e3720844fab. 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/DEE862200658 — a six-check JSON result.
Piano Trio No. 4 in E Minor, Op. 90, B.166, "Dumky": IV. Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d355b566a54f2c1c315d69825f046ab232720c3ba1d7546a94545118621abbd. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DEE862200659 — a six-check JSON result.
Piano Trio No. 4 in E Minor, Op. 90, B.166, "Dumky": V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87eb4d6f709f8ff60cfdbe208ab9d90dfc40b2745b972c78dccfc42ac41c85. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862200660 — a six-check JSON result.
Piano Trio No. 4 in E Minor, Op. 90, B.166, "Dumky": VI. Lento maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdf3252c59b8a48ffb6a2a3f608cb4e373fc9eff7faaabdb1785fb7a5076108. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862200661 — a six-check JSON result.
Humoresques, Op. 101, B. 187: VII. Poco lento e grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf525d633c50f9e1e9725e68f7c5b526c321149b9ab3007b3ad1f15cb90dd7b99. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862200662 — a six-check JSON result.
Davidsbündlertänze, Op. 6: No. 18, Nicht schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd1f771c7a01ac76621e78e1df586d22b501eef5153aa505b0b0d3229509b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422412832 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf525d633c50f9e1e9725e68f7c5b526c321149b9ab3007b3ad1f15cb90dd7b99. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862200662 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3655e38d8914a975670f12e9e602b7dcac600bdfc6df35199f68acd9e591374. 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/DEE862200656 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d355b566a54f2c1c315d69825f046ab232720c3ba1d7546a94545118621abbd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEE862200659 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87eb4d6f709f8ff60cfdbe208ab9d90dfc40b2745b972c78dccfc42ac41c85. 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/DEE862200660 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdf3252c59b8a48ffb6a2a3f608cb4e373fc9eff7faaabdb1785fb7a5076108. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE862200661 — a six-check JSON result.