By2 is a Singaporean duo based in China. The duo is composed of twin sisters Miko Bai and Yumi Bai. By2 gained attention at the start of their career with their first two studio albums (NC 16 and Twi
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 0xbed7ae72dc82cb7dacc229f4e1cc0f2108dc13138a1c7a40fba5920860b4bd1e. 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/18e5460d-7cd5-4943-85fe-bb21a4e62529.json and https://artists.proofprofile.net/proofs/artist/18e5460d-7cd5-4943-85fe-bb21a4e62529.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 0x91d20070976c106ea3e72f8ee3ab5fd411b528b9b77b3bfb5ca4eb9639532768. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TWB670804202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb3b520944b8d93d0e70840db0578738d30a264c8f42252fbeaa74cfd648cb0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TWB670804203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d197322c611c82a2b96a8c7ff84285b6b85c7498811bdc2d8e62c9b64f6381a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TWB670804204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ce376cacec4595afbcc7cc9d7c90c295a7f4408b03a2cadc8bace988a1768f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:11:52Z), 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/TWB670804210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd56bc303f28cdb434aa1f0efdf452c868b7b242af5d097a4333d48c2974b54. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TWB670804201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92780a4dc94af07a5530727c624cc27ff47eb75a706c9b2e5abad6eff20bac37. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CNA650859711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a77c97532bc73e132489e3e543521450501fdb676a8641f8254c656461380e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:54Z), 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/CNA650938406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f389b198630c5f8631e0987ebd879d87085268c22357885ebc36b36cdbad80b. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CNA650938409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a2499bb4edc0767c592fe6fd1b869fff1890073d5385c3638f2fba655b3f7a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TWB681003201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820e584312c0493a33916e444d0416da9d47571c6efa2909d2fafa3c13f1269c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TWB671002202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735319610233d41027cd0275cdd3c8b8425a122f9b55431c15d753cd5099dd7d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:22Z), 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/TWB671112206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c7dba340250447246b83a3efbbbc5ce5271400d43b8baca4885189dc7ea4d6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TWB671004201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d7f1f76e00ad5264143c69b3dfd2d2e68dc439e3736416184cc158667d6404. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWB671112203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e58cbd28d6ef6bafd35ec2bc3833c856b1f37381199da225f2c3bfa47a57d1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TWB671112209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d22f9e1ffc11ace3d1009cea4d83e48f64fed3a098c9d79fbc37c9eca882e24. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TWB671205201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f77aed7afe2fd7d662ab28049266c3060d2b2a6237a5f0df1dc574ccea96d4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TWB671205203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2616d10232a177fdae83b8f33a5f1513353f1796c68b891cd8ab0018df9fcbb2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HKE571516401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048dd7b8f0f9eceb1bfb1f3d403d02f012d23528980096d7529f0a0827eefb90. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:51:42Z), 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/HKE571516404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d3c5695d199d3453689e6d1ee869355fd96eafaa8c864889c63ff0838b5e4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:03:22Z), 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/HKE571516405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2029863ca392580015597b7aad0ea93d624d0688dfeeefa83f93a3847cfccf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CNZ171700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f4f13d8f73d77f9c5ec6bdd9adebfda23c8788c3c6bb4ea28c470978fd3df. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CNZ171601102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111a2a8dfe16ba336abf752937495a2a4f004589861280115da0f96c083b4aa3. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/CNZ171601103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c27f452eab600a97b4a2ad9bfa87886c6622e9ab52780b2fcb2893a743f66c6. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/CNZ171601104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb485259277e9131044ec78334f711f21a8f11176bd39f5bd0d77dea5f996c8a1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HKG732225691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb485259277e9131044ec78334f711f21a8f11176bd39f5bd0d77dea5f996c8a1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HKG732225691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0f98778a89ea0360645423033268f47673b45d4b0f2ed32f946f578687b5c1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWCC32201883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d2aaad069af73c8c75ed5311531a52a10f5e0f16520535e8ea2e08bc8cff44. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TWCC32206096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79748ddc107f221b4af04ff7030889b63eb6ed4d870f3fae6ca6cfddb039ef28. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:58Z), 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/TWCC32305162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf949c61cf57023ead0563c4e47468a141d4c3ce0b5785aa1e430cbe74f9b98a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX872577251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ac29e2752cab8349dfd3dff493e9a8789a01187e2dac24eacab85c252e9f7a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TWCC32310260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c1be0e28775993e8bebb9ad64d30505f260daca0bc4995bf6ba57daf906b04. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TWCC32322355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f0e4f9f9ec056642fd773fcb7c0c2660e58ba6454cefe030be8f26f87c305a. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/TWCC32401055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637eec82b2c3123c0f8cbeeb14632dee428d130250f4c64c6119529cdebaa28a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRX872532387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca2a4725177f1d71f21bf6e76ce7e5e23b3ea047cac7cb082785ba0a2c21aa5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX872532358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3ec97871dccc201a8de8a0e57ef448de3a2ece0d48c5ab45cebc2de2270bd9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872532321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe237e1f9b393941fcadbbc6890f3ef5fb47f4fa4ab1c974764de1b0fc2196e57. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX872540180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60c42b9fe2d82b9f0da534007833ab8a4ecdebaea97f7b7974fe709a459547f. 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/CNZ511600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e09c3ef34142003b6ea98614aefadb83ac7850fbd0622c06d014ebd82d665b5. 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/FR10S1615770.