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 0x9383cef0811d6c2d926855072d0eb55b0d29030b5d88b74a7af8b97270bd6e82. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a9af097-63c7-492f-9288-7bd57a3d20bb.json and https://artists.proofprofile.net/proofs/artist/4a9af097-63c7-492f-9288-7bd57a3d20bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
カレはヴォーカリスト❤CD 「ディア❤ヴォーカリスト Wired」 (エントリーNo.1 レオード CV.増田俊樹)
カレはヴォーカリスト♥CD 「ディア♥ヴォーカリスト」 (エントリーNo.1 レオード)
カレはヴォーカリスト❤CD 「ディア❤ヴォーカリスト Riot」 (エントリーNo.1 レオード CV.増田俊樹)
カレはヴォーカリスト CD「ディア ヴォーカリスト Xtreme」エントリーNo.1 レオード CV.増田俊樹
カレはヴォーカリスト♥CD 「ディア♥ヴォーカリスト Evolve エントリーNo.1 レオード CV.増田俊樹」
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 0xa42393efd32b9709e674cdc79eaad2c674a07fdbbaf22890f2bb5c6e03f30b22. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/JPZ921906191.
カレはヴォーカリスト♥CD 「ディア♥ヴォーカリスト Raving Beats!!!」 LUMIERE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2299fdef45ecd8d6ff94f782a57572bbfbef8aff451f6fd29a9443329bb0341e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPZ922015269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ae444463d0fe56dae895918b34d5cbe29bc85f9f617affdce98f9b0d322b0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/JPZ922015270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055f327c4dddc2e32adcbc016453821bb2320178a508ad80b480486274959a09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPZ921611476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42393efd32b9709e674cdc79eaad2c674a07fdbbaf22890f2bb5c6e03f30b22. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPZ921906191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caf3cef3cc7c36c3b59d8a745f3219ba6202dd0eb4083a9146c82a2b2213f46. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPZ921611477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7aa29a29d9783e2360326fa67c4bb7b4bcb95799d2d97e2a0466021db48f46. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPZ921511104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf082c7036e896925511f4400228370be2025cd5af3daeb4f1b9ad9be16f97415. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/JPZ921706557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2299fdef45ecd8d6ff94f782a57572bbfbef8aff451f6fd29a9443329bb0341e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPZ922015269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ae444463d0fe56dae895918b34d5cbe29bc85f9f617affdce98f9b0d322b0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPZ922015270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b31b4ebd9899bc579a80e7e1a3db828a17ea70ecb05593ed54b6978291211f8. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPZ922015271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42393efd32b9709e674cdc79eaad2c674a07fdbbaf22890f2bb5c6e03f30b22. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/JPZ921906191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf082c7036e896925511f4400228370be2025cd5af3daeb4f1b9ad9be16f97415. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPZ921706557.
Kare wa Vocalist♥CD「Dear♥Vocalist Unlimited」 (Entry No.1 LUMIERE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eddbb2f0d644c5829ed6e1773eaf6e239dff4f1dd311353df14158b929b4c18. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPZ922204112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25a79064cff1f409cfb797e505cdb35d0516bacfde6d8b2b2c134989be56196. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPZ922204113.
カレはヴォーカリスト♥CD 「ディア♥ヴォーカリスト Unlimited」 (エントリーNo.1 LUMIERE)
Kare Wa Vocalist CD Dear Vocalist Headliner Entry No.1 LUMIERE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b49b1bc41612ea52b509f522f84dff97aa94af9ce4397e1e9d568726be5a03f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/JPZ922402400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5649a6386a79d49dfb29f72a7e2c1f145aa7fc502bdab3e828a9e202d5c0a005. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/JPZ922402401.
カレはヴォーカリスト♥CD 「ディア♥ヴォーカリスト Headliner」エントリーNo.1 LUMIERE