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 0x07e4cad58e1fbb14cb60c966a9d4e2885d36cb8e29ba48c775695e0c21317da6. 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/2cd2b908-5a5e-41c6-9dc1-6085882f6da2.json and https://artists.proofprofile.net/proofs/artist/2cd2b908-5a5e-41c6-9dc1-6085882f6da2.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 0x7157e0c73139684bfc3b4721b59f176b03cd5dd38ff8dd5df87dd218847f571c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/JPN261400174.
スーパーサマーライン 〜消えたはずのセレブのあいつ〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1468e1573b5ae81f22061924c85a87c9481b05d9d3fa3c13dd80203b052fbabf. 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/JPN261400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a584e834d8e2cfd6c9a16d26aaceb5dc9f0a379aed59d47b06e7c697ab454eb. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPN261400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc645f8a53a68099aaf5fd6dc565f0fbf9c6ab6f2595a05180475ca4060adea58. 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/JPN261400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34684654504f49c40b926fecdd9b60729a545e429286cfc3a24dee85d9dec901. 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/JPWP01570556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ac4e05d727e6b1e0b69de8f4f2592200f19e442d7f28a9e53e6b718684a81. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/JPWP01570559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce3dffd4832faaa5be73074e1fd32ad5445f767cc1565dd3e04cf1c61ea7107. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPWP01570557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f929c2fac9b02d95198255422ad96e8b60b1c4c4a6a24541f91c9d8d25d2f0d. 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/JPWP01570560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab7a11faecab7508da6aed21e373966d28412ea142b25ee9788d039ee5cca5f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JPWP01670024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538e0ef6e672c97fb984b91ab4ec775f6ccab187a527df19473ed1b5ab151fc8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPWP01670029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bdb9222302a55aa9f6b7666f41fba6c14e28eb869b38ba6e208c6f63aac7ac. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPWP01670032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a9873a6514ceb9e57da3be0ad9281b01b5e0727847c68c8330e0b321da557e. 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/JPWP01772054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812934589b555238f9b960e9a39fb292389c8228bdec8a9f82ba97ddb511c30f. 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/JPWP01772055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c723883885ea61719752dfa018f7b009dbc4d7e2e972a8eb6bfe85ea3b2e4b. 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/JPWP01772058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6501c254acc1fcb8865a1e66c62ed046dddfb447fb8ced37c74b813307133264. 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/JPWP01771227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd814a9fec1907ca06a5645c75e16c3cfe3d8f3514ccc83f0f15a70ce91be6205. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/JPWP01770001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5686956e78bfc082d70771ba3afdb7f4ee28167a61998f797c357546282e2c0. 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/JPWP01772062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce43ddc1c8c484183fd23ac6580100c4db2ffc4fc754d279a948f1f365b6184. 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/JPC621800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6356c36d5c048ae7de6a77580194f3529d340b9d6bc7c6b518a4a0a44a84ef52. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPC621800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18440818f1bebca5405f04e21cb8443296ad883664c09c8494fa3bbb48311e51. 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/TCJPJ1903566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b41e966a4f206444db04caf290d2d99da39b856f4a6a05d42e6e7797386e0c. 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/JPC622300902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f58abc142093037fa3ee98b1030f32197706452108e57ca6c93f62c73ca3b1. 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/JPC622300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340511d382e67f3ac00a1c8e17fa0a0621c5bf0bc2757b11c73bd5f5f36c3d3d. 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/JPC622400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabef2f31392cc262165441db0ea545ca570100905f27d2d9ed2fd9c35ae8daf2. 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/JPC622401401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a331b98c26dbc68ee7b025cbef380a50b9793d1b2632735b813e897dc3b2da8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/JPC622401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391bcdfc66b3c2ce786de9c82ed99592394e1de715dad7c9f406e7a5d935003a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPC622500714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4981a98e6755925e9cef87772478e80bce58277faf14cd8e443205638056f11b. 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/JPC622500702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e94288964c9480a6d817ad32f1a7a641e013586a3d8010fe294841c763aea2. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCJPK2560676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f669cd1320b0a76059efc86e697ec096731fcee059bed1efd10e8f32e02a76. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/JPC622500703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47637706fcc436d541b2b9b109eec47ac32d535cc919ca1f530b9dc3e0f435bc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPC622500704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3cf53f0622ad036c37ed6c05aaac7d44b36881c6a0c6f31da141f306c3067f. 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/JPC622500705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b265bec47b6e2264c91f699dd797ca8ca7a15c4ed467f271d2c79fddfb58f3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPC622500706.