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 0xd52d56d090ccf432fa79f34b1fd26d512ab7cca44f83b791d2afb4d2e18944eb. 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/03b759e9-83d5-4a7e-8b4e-689acb1a9bc1.json and https://artists.proofprofile.net/proofs/artist/03b759e9-83d5-4a7e-8b4e-689acb1a9bc1.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 0x012d1f4e4d59f6bcc0840640bc5a8dec7a8251c31c3d3661308784ed862f06db. 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/JPH440700773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80497c7629c39e63f9716905bd07384e00558480101f709d104978462d697a1. 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/JPH440700766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edcdd508d59d9f535e0983dd3dcb4b97127bde67bad7c27aef845690b3e0171. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPH440700767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb73f0e7742222a5c7ef55121952b7f5fa17528fc08cc2f958d28443711c2d40. 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/JPH440700737.
ラヴ・ソング・ベスト・セレクション①
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303780d7034181fca24189ba4f8e6d9e2c7519b2429c0e46638c9666f2597dde. 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/JPH440700605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aca3803da1fd66d080279a600d0f0cec36ac5f11316d5837f975abcc4e7977. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPH440700360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ef6e74c342fa2af811b428e4db2e0181ab4939574e79a237f1cb10c4650082. 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/JPH440700544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3ea5b1df90550c35141a2fe5c6d791b50e075d6cc3f9e3cc7b9b9bb1df79a7. 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/JPH440700623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deee9a2561b71da3dad8111daf940cf3cab17699d1482183d7aa86de8601f82. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/JPH440700595.
サンライズ・サンセット（「屋根の上のヴァイオリン弾き」）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde7e99ea33a9830afb62115796f2bf6541be20f9e699065db231b2f901d4b21. 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/JPH440700612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78526d63a7989a025c45d4910f8abc249940ae2c94923acba7bebb45575d441e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/JPH440700629.
エンドレス・ラヴ（「エンドレス・ラヴ」）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e1550703e7bf3c7b16f0b7d11461eb0f74e2b06a3c95a30a4cd02ff7af8455. 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/JPH440700422.
ラヴ・ソング・ベスト・セレクション②
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f72db0c2b9eede6c23ef891057606024bccbb3bf0cbd6e96a84bda74bfc3a9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPH440700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90335782de7c03aea9c1e48a3eb1767c0e707085ede18c2cc618055e4261dcba. 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/JPH440700455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf382740090d1241e018217eb0bdaefded3c12bd1f757117c516d1fcb6502dce0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPH440700579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242885df8e2a41eebedeedda12c4e07a4cd42c3ee00eacfc83a2364c1ba7ece7. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/JPH440700412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff60f740f727405d96d67a96082e153d23d8af2e5e9bae43b6e814f78dc433. 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/JPH440700493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab551a4af26c02a3b7df81bc50315d5bed4ac9ec19c7b07159374e581a3b3e7. 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/JPH440700677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ea4e08e7d9728de38cf8ff1a5e779cc2eaed845a3971a9c3cae68574ac99f. 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/JPH440700740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a27c0b574b79853e927cf3328979337ad41c352dc74dc9c916ab960e83cf43. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPH440700353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e3b6ec9e202b4396672fbdf9325c12cf327b3920787be15ad9cdab0a006f02. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/JPH440700449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000499c1b6e44356e611baa04dd227ca6285df9e6fde1c5f2aead9b975777e62. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPH440700568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2338793dbbe52760d4e93e7ba5677fb30c31ec108fdb4803e46318041cd1879c. 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/JPH440700426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7af9f749f5e58bf411fc91ca267e645360de68abb08120512a48d06621cb0f9. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/JPH440700532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526983416daaeb7ffda8c3ed7797954a8e5ceed3dd1804fa8890a2c904fcba4b. 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/JPH440700465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac093e138bb7e6d9bbff957a18e77052fc259b774a86324079e9194702c7e21. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPH440700476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75a607a66cfbf902d2a60d644751839a7f8bf12676fd403091e105f1e811ab5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPH440700511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100b82d8444ff011bd3bdb861aa409b7d64b6c212ea4142204a7e8785fe935ad. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/JPH440701326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0df304abba5655fb2d7b18181d40649d82913db499c72aa8b1b74093a28f614. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPH440700787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72779b5197c473d733ea1b66aa338f701de8b56143f8d1881de2e29892923480. 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/JPH441502587.
カヴァティーナ(映画「ディア・ハンター」より)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51191150a04ced2113b4cc7e9f2e75da158e060241a73dd2e0247e8cec81b58. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPH440900975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696898ea46092cdf94372e47faad2dd673f4dab506d79e8e23a63c9cdcff7abd. 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/JPH440900977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526983416daaeb7ffda8c3ed7797954a8e5ceed3dd1804fa8890a2c904fcba4b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/JPH440700465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b9fe782188c28094d78f16a6e7d018fe9f7d962e27ae507da2fcc47ce5e3f1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPH440700479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84900ce884b7d4c966a302080734591309fd51e6167b354563a7d745ede26e5. 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/JPH440700505.