Sweety was a Taiwanese musical duo formed by Esther Liu (; colloquially known as Yan Yan (言言); born August 8, 1988) and Joanne Tseng (; colloquially known as Qiao Qiao (喬喬); born November 17, 1988). 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 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 0xece0cdaa261a89764320f67782118529175ceb1c3399920db4235fdb96ab68f9. 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/d6a6efb6-1cec-4407-9970-8156cabfa330.json and https://artists.proofprofile.net/proofs/artist/d6a6efb6-1cec-4407-9970-8156cabfa330.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 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 0x148bdd9de8c4856c3b12321878e9c9cfe1bb3c9b2817c691381181a5b0097556. 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/TWB510643701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e88978140829ab81b99216ca2396635e52d7c4147ed09b989b2eefb6fbaf2. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TWB510643710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2bbd53c3eddc3fb6628ccc0141fea7b31b72a99ccf6e1b771d7a0c93bc7568. 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/TWB510643708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef9282fe6a1b373289eb1c9af1cfa09037148c5ac192ec9d746120d87ca0427. 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/TWB510643702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab8579dc4d70d7b32205f70c109ad28dd9a689dd6155b6e83f4f62ce222b8ab. 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/TWB510643703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3757579297d4889d084ec6008a1648eae4531109a3426e524ffffffd9e192b. 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/TWB510643705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf187410bf9f7768be7682d449eaedc80f210172c89730eb08a02905e9a5bd7a7. 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/TWB510643706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2a5e73b0e5c8bdb94d4cf296534d4520d2f48b3d8a842d7dba71988dc278c1. 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/TWB510643707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9dcd2355ee150b99b50ce00aab6d43eab406206815dfc239221309b8f8d650. 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/TWB510643709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527f1e93eae5392b661d74e06b8edf54e83dd29a886f0e878c602793c5508835. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWB510643704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527f1e93eae5392b661d74e06b8edf54e83dd29a886f0e878c602793c5508835. 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/TWB510643704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb20e792d60df84477105487808902031afcfbc98420605cad69b6d3fb2f13e3. 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/TWB510746603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708cb936959f7a9f3887cea87dfc3ce4ae412b37597870e8711bf3b3dea68c85. 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/TWB510645502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4821e6c8df8019389490db3e2f5d3dd58f62801d80fcdba1949a29fdffa0b5b9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWE670300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585943cd863fda057cf0ae5b3c0aef79b8c513e6083cfa5b0a95d373daea61f5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWE670300107.