Zaq (stylized in all caps, born March 16, 1988) is a Japanese singer, lyricist, composer and arranger signed to Lantis. Biography Zaq began to learn the piano at age three. During her college years
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 0x4a770b3c6d3c15bc5b34ff764b74120d41f1815fe40fd2ca0cd338aa6decffb4. 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/de020f8a-f55b-4d0f-9140-3d64d7ee7b99.json and https://artists.proofprofile.net/proofs/artist/de020f8a-f55b-4d0f-9140-3d64d7ee7b99.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 0x4049eb7af7209fd065b9a43bd3b8fd8ed7da9fe54be7ab1b590738986c9e23dd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRS182018156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2cd608daa251140d116a4e4c664e83de94c5b251dbf026cc0ba0e8385b7496. 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/FRS182018158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d07571e942d1c3f8caf98776b29a686b36ca0486c8d678cf22851f35349167. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRS182018159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301467c218d86e0e695385b42f99f926f35ca140ed5ea7c8b53ea378716489a4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRS182018160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8a9871fdb58bfd0cd11794f38020fe036c061cb25c14374b78d0061c1af15e. 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/FRS182018161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecd5a95e40b0cdc60f5025d27c463d5ed0fc54618090ec382a64afac4f9cb5e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRS182018164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03efe52478f1564402f32d03d461a818af00e4d8636fed35cd39f75747c4e7eb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX762149154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abe135868320bbdfefd32420636db53b65c1bdf7d0315644449f6f5f1bc3f09. 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/DGA072416090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477a4b1f1151d4b167ec0d945504c1c67adb6999fc003ad0ba46fe6c4069521f. 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/DGA072416091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9351d6766dabd816a8909af81bf9bb5eec5877e2de70c667b6450ae24777768a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA072416092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce55b5c291e15013b8ab1166b3fc55860ad581adec96ac5c6d1a4123125cf3. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA072416095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f1c0d28542d2dc6053a88d8e179b9a32eff3d020e202c1d5859d362b1ad4ce. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DGA072416096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5b986422b10b93272477a379042269b64057cb551bc6b54072571de06a3dc0. 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/DGA072416097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fded0ca44a9880b5a75835fd93f66f4fdc6d73ea4634bad0aec1275b6f6951. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DGA072416098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3a81be18428fb5f13dd9866eb971e7f30bd471a7861c18431ceb424e35d6bb. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DGA072416099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5221b37c5db727b0eb263652891e00535a4fcc1d0ddd8f77e9790d9ec7fa6e27. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DGA0R2414881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf870a14b55aa6ebcd08504fb136471d8723b23d0e43336970d6d211866211982. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DGA0R2414864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d814d033805d48eff18691523403adaa9aee9380b2d998acd40db67f60b137d. 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/DGA062512700.