Tomotaka Okamoto may refer to: Tomotaka Okamoto (footballer), Japanese footballer Tomotaka Okamoto (singer), Japanese sopranist
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 0x336860bd1d215304e327e9e7493075d7f91ef00340b1073b4a6481a96d4f6481. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce3c6f03-7376-4266-b341-f894886b2d3a.json and https://artists.proofprofile.net/proofs/artist/ce3c6f03-7376-4266-b341-f894886b2d3a.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 0xc54ba017fbbdcbc9185161f1181266b7335a00c514a76dfd52facf1b5931a4ff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBUM71605834.
あなたに太陽を～CDデビュー20周年記念ベスト
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20f3ebd3f276f748a0af12dcf2d18568c028b48431648ff95cc2089bc85c6d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO02302494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a273d9ff90ed9d5e385a6bf346e04b52bbd68a14991df5be1381d3db098884. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/JPPO02302495.
Japan Maritime Self-Defense Force Band,Tokyo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3056928d91294a205b7b5b6c2d8cecac05c3d8a2b535d458b4cfeb034359b607. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO02302496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed3ee11ed510645de065403c98968df72a529a804a8405fb5c846bdd3366a97. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPPO01620195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ba661a1dce9533c1ab8f8077a96707aef79556dfee0b282de2aec269660882. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPPO01900510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed3ee11ed510645de065403c98968df72a529a804a8405fb5c846bdd3366a97. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPPO01620195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2622a388e222cf66809243be0f5e38affc227fc960a9f6a3aab68d7f673b62db. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPPO01620196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a88a111472736942383783a783f769bfce19b55c5199c1f8fda1331980d552c. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/JPPO01620197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64f492048426313e5cd0df3ff1b63d00d13e7a7bd53cb926f05622bd429faed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPPO01620198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc390ed491956d4cbb6876487ec6d84806429abc45a5fbb30c011d999573757ab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO01620203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaab4fe41db0c3ecc2c4c7dc06854fccd574fa15ce5a60acaccf3bda2f503bd7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO01102840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016b5b008ab8565678762fbee0aee335fac6dd8a7eeb9eac7ff15e594949b306. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO01073660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c116672ae28d2463b1b0d015fddf36fa75ba29205cd23271ccd73d4cd0cebbc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO01008550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa1e410e84ba642b1fd8eb5eed63657f913d19b6217e0ff03509f9d033ecec8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPPO00523750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18685ff31d7f81e9276fe4f091e9c08be5ab063390c28933477a54eb35d7596. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPPO00523820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e3496d4bd725362437589bed3f2e1a590f1f8043e27b85e3c6a3c5ea56b32f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/JPPO00523640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c28ff523f15fc12cef81907ed972e87da6149020a1fc644bf26c3ae39d49d33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPPO00523650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e453126e7719fbcb842610740ef2d698432f8629c1c3863b96949919bc0b7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPPO00523690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cfc0fe761b7cf618c4bcc20047a4e3aa6698addf587f50bf77562cf68de9fb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPPO00523720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa1e410e84ba642b1fd8eb5eed63657f913d19b6217e0ff03509f9d033ecec8. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/JPPO00523750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1ca0849852270198b20fa987c93424e70cd179acfe274e88ae36f68c5769d5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO00523800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d03004411a34bb63d89efc19e75556bfe9eb4e7b32bea612bf907a411a770a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO00427270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99fcefc2e31dd389e53923ef9dad05b3398224a64d73d501022267717f6e96c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPPO00320000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf176222a4d3ca8f324a7ed65136154bffc565b103467c115c63052a54701ee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO02102721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ba661a1dce9533c1ab8f8077a96707aef79556dfee0b282de2aec269660882. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPPO01900510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ba661a1dce9533c1ab8f8077a96707aef79556dfee0b282de2aec269660882. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO01900510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a06c577fbba90762590138d5fef2fd2059d3dfddd9c0dee5345b82ef2cacf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPPO01900513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9798c8c2c49da3c940569b8d849bd30507064f765306201629d5597cb074cc2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPPO01900515.
ラッシュ・バイ・タカシ・カトウ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264facc52930063c534367553ab4ec9234d51c1aaa20a148dfb5bcddfeea82aa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO00961100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dcc10d6a08170f480a7064a9f92a93eae7ebb7be4897523b6095e63ba29644. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPPO00961110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ba661a1dce9533c1ab8f8077a96707aef79556dfee0b282de2aec269660882. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO01900510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3969fb205104b813262662b1bdc1da386c8dfee251e4852116a42d9a5ebe75a2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/JPPO01102870.
Puccini: 歌劇≪トゥーランドット≫: 誰も寝てはならぬ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ca73ff752255dfb55ad36219ddbc806ee792af80822b435606c7721c332f7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO00319910.
Handel: 歌劇《セルセ》: オンブラ・マイ・フ(なつかしい木陰)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af669364095765017058e03a0f4c578da363d452b67808e1def0e1d2404325a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPPO00319860.
橋本晃作（海上自衛隊東京音楽隊所属）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e0c9eac62171d128d15234fa4c93651b59e84dc05e025f1b1a4949f372c2c0. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/JPPO02302549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d817c012d60148324af232285c568df46c70ecc7a932c5ff939e2242984e297. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPPO02302550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2ad61aafe8ba367c67ac7fe45424c0f23d1d07815f42226cc479c83a0cd825. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPPO02302552.