Xuefei Yang (; born March 15, 1977) is a Chinese classical guitarist acclaimed as one of the world's finest classical guitarists. Classic FM named her one of the 100 Top Classical Musicians of Our Tim
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 0x248c2c1af076cfb2f190a4a0ac0755a6966e3d99618e974ba84d6f7297b4dceb. 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/bdff6add-1f37-49e9-ad1e-5c69c645e87e.json and https://artists.proofprofile.net/proofs/artist/bdff6add-1f37-49e9-ad1e-5c69c645e87e.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 0x14dcfd12849a5eae9fa28ae73b5af0edb47defbc2485c0b14238ea842da043d2. 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/CNUM71600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000f6b13d696d7179d9f3b360977b2a7bae360734f7713e1a2bf7e1651787c6d. 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/CNUM71600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9219b37d8f14ba572055e3909cb9254fe35bfc833ff46774e50125bd085930e. 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/CNUM71600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dca58407bf71b5b2c1e96aece05651e977099ce67206532d85be952e6cdd3cc. 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/CNUM71600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21521d0dc50a4046647cd718cd59563981ea6c4c37c2aeea028d3f871cfe988b. 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/CNUM71600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc137d03a219c45f1c7c9a5f2203ffe2597383b009dabaa833f5ba9623279ccf2. 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/CNUM71600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea560a2a0ac403f6a1138952fe57cc032c4c4a6cda3cb2e2f4dc1fa124c7d8. 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/CNUM71600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6483749a99cdd6577937e66b6389d844874b58dd9fc42200187fc7af6aa24fd9. 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/CNUM71600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f2401e08c510f0f76fe1f46fd1c7a778bb6ea04f7a87c323c55dacb58d87d3. 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/CNUM71600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422518850c52124c0db938f891d96b4180476ddd77b165b27fa258d43774e7f8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CNUM71600016.
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 0xeab13efa357c4c8d6e094e97e72712d6b94e9b1e39d1146dd7d1348a423ff506. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CNUM71600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f88f76bf2642c6df68f8745e198e588292f401f19f14b12765ae34bfa2439. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CNUM71600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5cd2d4e94180f285085b3f94130d540e42ccf67ea5373eb1a5dd292cf30114. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CNUM71600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00a07eead9fc28ebba9d0850b6f20bfbbb2f5cf909dbfa447fb9ed4c575a5d8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CNUM71600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef9dda0be50b694fcb758c683f74ca7253ab2353e497c9bbb6a4130dcab08a2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CNUM71600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f9b0b44f255215d2df21233b65290cad120486cd629c89e2b946b2c4537ee. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CNUM71600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2452e0423842c7c75f2de36ff4214501766bbc8ca6b4083ef0256718ef977aa2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CNUM71600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6157dc0593f789c3161fe9b37687f2bcc2f6d43e2593919c3b4433874a8a1d3d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CNUM71600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cc7639fcbd16f9fde9eafe4db94a6f59c175f138c32f528601fafb2c935674. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CNUM71600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7245e1a737b310ad400fc8f51badfe36d24953ce483ad4fd793b556f0edcb6d5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CNUM71600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8579d7978d4d0a98a63b79087d82381bcd29bffe9b7c28d85a3196ac02e2692. 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/CNUM72200252.