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 0xc4a8f0412b10397b26fd42022e3a1be513fa0904c7681740b26344374acfe04d. 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/2ca43586-c8b9-4b55-85f0-52fb817fa6a4.json and https://artists.proofprofile.net/proofs/artist/2ca43586-c8b9-4b55-85f0-52fb817fa6a4.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 0xc84f17e8f6cf1a29340e717a21f10784e68a809c9cad1c9c77cef12e765a95cf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPQ322000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdd45778ac473704f422a775aa5af657f4c4c3d6cbed50327330c4e683e7d6b. 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/JPQ322000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3695d848a4053f2a14fe76e2498ee8ab282b4dbf9cf95d01f7bde56c396c66c5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/JPQ322000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdd45778ac473704f422a775aa5af657f4c4c3d6cbed50327330c4e683e7d6b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPQ322000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36b11481c55fe108b7a0f09f2657f7a24a1a24a23846379dd953415e415aff3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/JPQ322000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4e4295d0d9434e05495d3f17338abd2fdf94238d68ab57bc2e9c19efe54fa5. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/JPQ322000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01318d9cb19c7410e2d7abe28a1b742e467dbabd48847880ff6a865e04f6d2f7. 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/JPQ322000013.
ミュージカル『刀剣乱舞』 ～葵咲本紀～ (通常盤)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e2d203f823033f0c6bcb91b760ceb92b3dc2bc3573ff8c936b42e760eb8dd2. 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/JPQ322000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6dbd0d16b47a990ef9df3f0472673262389a9449608585a0f6bf1668f21d5f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPQ322000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb138ee49bdd7b54c5f98dc40c1bbe20b75b1d2be7561fa594e2fd95874c54e5. 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/JPQ322000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50faff1a8ea36483d510e6c99b96f12c21201fd58193ff6a66dd0e8cf06b9563. 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/JPQ322000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b54160b3305f60e6ad78f5fc3823fcbc4e433b689fbe41fdb0a9984968803d7. 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/JPQ322000029.
鶴の一声 song by 鶴丸国永 voice of 明石国行･蜻蛉切･御手杵･篭手切江
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc303504da3a99d87443ca9a666ae389447abc19650b7426699cf3361673a3553. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPQ322000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4737b961a2b3acd23731a0f86ef71b1fbb8cb50682ab24d47f41c2b567cd5cec. 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/JPQ322000031.
夢語り song by 明石国行･千子村正･蜻蛉切･御手杵･篭手切江･結城秀康･永見貞愛
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4c4f77d4f986c0c7a76f58bc1cc0950c0223f33b5e2bf83d08e10623740b88. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/JPQ322000035.
前進か死か song by 松平信康･結城秀康･永見貞愛･徳川秀忠
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87815eec9012d94bc85b9532ca759402dd4d0774e3e0eb8c9cf9041cd9cb2237. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPQ322000038.
Touken Ranbu:The Musical -Kishouhongi- Tsuujouban
Kimi to miageta anohi no sora ni song by Tsurumaru Kuninaga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc93dffe3a5982dcebb325979110a68ce2ab3f54d2e55c4c1ee0686c13376ca1. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPQ322000015.
Touken Ranbu:The Musical -Kishouhongi- (Tsuujouban)