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 0x8aa3a94a80987daf07af349c980f4e05384f6661f2014268d2a527f8d0fcfdac. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbf1269a-09f5-41bf-9a49-d9ea80834b63.json and https://artists.proofprofile.net/proofs/artist/dbf1269a-09f5-41bf-9a49-d9ea80834b63.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 0x1078828968c6a77351f4fce1173eba2ca928aeeb63cff678188ac659aa4c097b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:57Z), 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/TCJPY2361759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d37dd437f935a43a43654fbcdebacef395f11b92d0bc66781b4fbaaa52549e3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:09:36Z), 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/TCJPY2361735.
Summer is just around the corner. (feat. KASANE TETO & HATSUNE MIKU)
Beyond, to the contrails (feat. Musical Isotope SEKAI & KAFU)
until it reaches zero (feat. KAFU & HATSUNE MIKU)
彼方、飛行機雲まで (feat. 音楽的同位体 星界 & 可不)
starry sky and isotopes (feat. KAFU & Musical Isotope SEKAI)
星空と同位体 (feat. 可不 & 音楽的同位体 星界)
If there were words of love (feat. KAFU)
In the night I want to disappear (feat. KAFU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d20dcecce4abe10ee7bfcb54774b220d39e2d0c8c2cd6938f38d3ef7dbf4ad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPA2469722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1078828968c6a77351f4fce1173eba2ca928aeeb63cff678188ac659aa4c097b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPY2361759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d37dd437f935a43a43654fbcdebacef395f11b92d0bc66781b4fbaaa52549e3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPY2361735.
生きてしまってごめんなさい (feat. 可不)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0503bb35fad4dbe744d28d39709c974269a7fcefb5a7c0eb2c381e836a0d47b8. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TCJPD2550620.
Dear Body, Dear Life (feat. KASANE TETO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7428a7576a3fce234c04b89b45e55d4320dbba7dc3799508b3521179e4e9f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:32Z), 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/TCJPF2555249.
"Lamentation, to the departed" (feat. KAFU)
You, Who Became Sparklers and the Wind (feat. KAFU)
"Dear God on Summer Vacation" (feat. KAFU)