Yoasobi is a Japanese musical duo formed in 2019. It consists of songwriter and producer Ayase and vocalist Ikura. Represented by the slogan "novel into music", the duo's narrative-driven songs are or
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 0x573e494e2337eb185dfc1df500a38a56adf53d8e35e11583a3817acbf1eac922. 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/58a163f4-fecc-45ec-814f-c3d530bf326b.json and https://artists.proofprofile.net/proofs/artist/58a163f4-fecc-45ec-814f-c3d530bf326b.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 0x3fba88d8498d06422aabc740c0f35fb92fc21ea203ff4951c6c648a0e5b03904. 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/JPP302000678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638565d316ca05de6519448250953f8f23e5ffe84b69b14d3edd862967f6aa46. 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/JPP302000677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d8627119b3f798be6034f33e282b6c1a461ed06d1b311005bf042a39de342c. 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/JPP302000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc78a8f2eafc0f81f646ee62a4f5764015ce8a33c8dea5d45a756fc8b3219a3. 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/JPP301900802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe493c320efdf1f21f98c96cc48f075e2812ba97a5723104539a116344ecad129. 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/JPP302000323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4ca6be1edb343095cb96567336abc111b3203a2113dc4eae30555c4e0a04d6. 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/JPP302000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650a1603b09198bb8f97c49e1b3717a718b941183e59c4e6d56b42018657c5b6. 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/JPP302000676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89ec8e6bc3c93217dce13a0efd0cfb4560160df0b820149f1d6b5abc4429822. 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/JPP301900716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b8218f7247d5a60818d19df3fa5cd882556d1c62df2a2b51a6d591800ec618. 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/JPP302000679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97be25d74a1d81f23a05bddde0f7799d95cf2792ad7777e2fc84396b65c11273. 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/JPP302300523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ff58d65df5bbe0f2f8d05b790ffad4ee7e2ca5a0a55757fc4d4c4af9a8cf12. 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/JPP302200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c015eb887f5c747c077ca4be9781377c5038dfed8e1bc9b045d6223e9ed4592. 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/JPP302300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc912822a373ee1f1bbc3ea14a47f3a3b714316e37fd93655a5543d038d118a85. 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/JPP302300808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d901dda3acd35ae521bbd61871553701166ae65430a6984319212ced43b79a6. 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/JPP302300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8557488e1afea317e69e99fc4915486fca5336bf8876105177fb8b8b8bd96c2. 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/JPP302000760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90466fcb5d50a46a8762c60dd49e00896cffcb19d7b6e697aa2d96b1afa73dbd. 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/JPP302200352.