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 0xb12af393efb3f5735400a3ebeab900151990ff2914aee0727e9f3e8d2acba2c2. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7124f6c6-fd4e-464a-a447-3ef71726235b.json and https://artists.proofprofile.net/proofs/artist/7124f6c6-fd4e-464a-a447-3ef71726235b.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」 (エントリーNo.3 ジュダ CV.斉藤壮馬)
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.2 ジュダ CV.斉藤壮馬)
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.3 ジュダ CV.斉藤壮馬
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.3 ジュダ CV.斉藤壮馬
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.3 ジュダ CV.斉藤壮馬」
カレはヴォーカリスト♥CD 「ディア♥ヴォーカリスト Raving Beats!!!」 篝火
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 0x68bbfd0a4af7816260640fe6dd37124fc696154b3fd21000a04d92125bc79985. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPZ922101571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6fe78773cf33b56824b620eb511c136839c9c190a80ac56b59a9f7a5b97d6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPZ921710218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe1b149db18abd846923bc70f4cfd0a9700e65d838a428aef9d30090e1d971b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/JPZ921809763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e69032bedf4c9d277089a9fb4da56be6c6fc61bf798941d5238bbc8c92bbd6. 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/JPZ921512398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5583a972d968bcb4c5c92e27c11b67e13bbd4d5b6c037c09c01a79cc0f2825f5. 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/JPZ921612693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b9594dcaa839e0ea9b3c4f2f6699c5c443cdc0774097897065e6c963943194. 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/JPZ921909271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4cd0fd10a9e6e499e2cb1c7a6b766474fa3ffa88970438dca7e11c496c8a3b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/JPZ922101570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bbfd0a4af7816260640fe6dd37124fc696154b3fd21000a04d92125bc79985. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPZ922101571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6fe78773cf33b56824b620eb511c136839c9c190a80ac56b59a9f7a5b97d6. 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/JPZ921710218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5583a972d968bcb4c5c92e27c11b67e13bbd4d5b6c037c09c01a79cc0f2825f5. 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/JPZ921612693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b9594dcaa839e0ea9b3c4f2f6699c5c443cdc0774097897065e6c963943194. 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/JPZ921909271.
Kare wa Vocalist♥CD「Dear♥Vocalist Unlimited」 (Entry No.3 篝火)
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.3 篝火)
Kare Wa Vocalist CD Dear Vocalist Headliner Entry No.3 Kagaribi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2427af8295445bad40a92ef35815d317ee21ccb4dfe3bf9db4e9f004e0060dba. 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/JPZ922403707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774ed50c4ea39545146b5720729cb920795af4f0610959b28086055e7d4c0bdc. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPZ922403708.
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.3 篝火