Bruce Liu (; born Xiaoyu Liu on May 8, 1997) is a Canadian pianist. Born in Paris and raised in Montreal, he began to play the piano at eight years old and was performing by age 11. In 2021, he rose t
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 0x2ff0f9719a5fc1b07049e98a2aa22156cceda652c604abc547d735091b78667b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45d3afed-1a91-4547-bbcd-625c9280079e.json and https://artists.proofprofile.net/proofs/artist/45d3afed-1a91-4547-bbcd-625c9280079e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Satie: Gnossiennes: No. 1, Lent (Upright Version)
Gnossiennes: No. 1, Lent - Upright Version
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 0xa1b88b1dbd13db34b7b1c07c24752f237e47b7828c8b30a286a00cdb26a888b0. 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/DEN962400581.
Gavotte et six doubles, RCT 5/7: Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62306b38d81886f373b82b28b06d4f8ade639da9209134f79652b323431974f7. 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/DEN962301651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a0dd1f8f4ac6ca749da4f0157254aa5babe223940fae2a71c398a7a3cee1e. 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/DEN962301652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b33487ab1f951278c58b1196e2957a0746040153e3a28957da29c7dd69e55. 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/DEN962301653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f32c4f9d790dd6e3e55886346ee960025df711e02ec96393d50077d13515805. 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/DEN962301654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3e22d3b389fe22336c93a35ab75d93d45f0f0b44dae9710b896f6cd8465e99. 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/DEN962301655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e788d2d4572143978fd74a4c310ddf44f43464cd0eb5d2b70bd013545b8d98. 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/DEN962301656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94223923b6848195614bb1c255b12766392e02df5faabb2c0d4fcc86d2215a8f. 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/DEN962301657.
Recueil de chants, Op. 65: No. 6, Barcarolle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda807688b014c5adf94965c77420b41eb231779633d78b7dfe2e7e91a972bed4. 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/DEN962301530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477e30f7cdc63fe9842aace512bd72342821ee5ce701adfb479891088fcfc042. 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/DEN962301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dccf6faa6e16d0df952c79ba8d30a64284665d14318bd2b356762cc8bcdb07. 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/DEN962301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7902707f5201d801ed835b431ff0897b9a63995d83b0604251bffca16e19e9. 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/DEN962301552.
Miroirs, M. 43: No. 3, Une barque sur l'océan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4495ec9709bdc3facd2980271b2bc5a7343462cf8b22c70201db60e3f5632e. 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/DEN962301553.
Miroirs, M. 43: No. 4, Alborada del gracioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0606f4a0945a87bb8f5241d2d9ddb880eeb6a5d5f471419edefcfc55706a2ce2. 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/DEN962301554.
Miroirs, M. 43: No. 5, La vallée des cloches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07321fd89c1dde2f06414b2da56e7e26707676870cfff2ad6878dd6e559c7b5f. 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/DEN962301555.
12 Etudes in All the Minor Keys, Op. 39 / No. 12, Le festin d'Ésope: Thema – Var. 1 - Var. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb629d34e6b5239b28937d9268bdb15e7c4242fb9948c02909bff28ddf4ee3bf. 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/DEN962301661.
12 Etudes in All the Minor Keys, Op. 39 / No. 12, Le festin d'Ésope: Var. 8 - Var. 13
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d9c5cd8c7a43983612848d605a7f9d95d62cf0137b1e846a2fb3d91be1a47. 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/DEN962301662.
12 Etudes in All the Minor Keys, Op. 39 / No. 12, Le festin d'Ésope: Var. 14 - Var. 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025276adcde1beefc8b94d6e6ba814aebbc4e04c6d11028c4fd55ffff7ccfe2c. 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/DEN962301663.
French Suite No. 5 in G Major, BWV 816: IV. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ded72f71d9a193e7b86dbcf4a4910243daa1314fccf89d5d2cb4baf110201ad. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEN962200974.
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