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 0x203dd51587a1521c5a6e1f9882f65230ab49b6c5a96a957b361d9feff658ff6c. 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/a182fca2-f801-460a-98dc-8efb336454d0.json and https://artists.proofprofile.net/proofs/artist/a182fca2-f801-460a-98dc-8efb336454d0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xe7f6457cb180884b666c89b213b7e3895bbefbf97c846d2ad0c00fb7b1e1be63. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01206450 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cd5de9b3fb4c6e18eff0bcb5072c9ad37b362cc436a2c900bc3f51a0f3e308. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01206454 — a six-check JSON result.
The Final Time Traveler 『タイムトラベラーズ』エンディング・テーマ (English Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba273ac0a38548098c52fda60655ecef9756ebdeb5ed0feaeb0c7e86468514ec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01410044 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14afa2fb31fee1e18ed1caf35ba6029c3cfa902a982c610fc527bf3a1a4957a5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01410051 — a six-check JSON result.
Beyond the Sky 『ゼノブレイド』エンディング・テーマ - Japanese Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08065b3da9922838d05c37b97743dd8ae4d22a1ee77b8d12fc133c6bb6e03aff. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01410057 — a six-check JSON result.
You Are The Sunshine Of My Life (MRT宮崎放送イメージソング)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1d977110d4d608be45846791fefd8d33156ee9b44f9d622a7d727bf4200d2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01510317 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf131ae901f747cd93bc85c89a628a6dedf68d35271c2b80345dc1b2aff096d09. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01510322 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2481ef0719504218fe8b2a5c96793a59399b936f71033f78367119d2a07244f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01700085 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6501acd40db1c2ee563f2eac114e592c06730773f772fa4aa178811089325a03. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01616428 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a1c03b5af52adc805c6d0d46886ce8ef7723227e431b810b124519c528661c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01623127 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b6e93a1400126895dc69e787575d7f9344b133590a4d254cb8d285bacdb113. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01700089 — a six-check JSON result.
シネマ・パラディーゾ - 映画『ニュー・シネマ・パラダイス』より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb4b28a1c201602cc92014587275cbb4b4adacb25ccc4b773d026a6f2497272. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01705309 — a six-check JSON result.
君をのせて - 映画『天空の城ラピュタ』より / English-Japanese Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b55a11768e62daada413d137803f4b8fe6228b89d202f561aee62e77a18edd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01510320 — a six-check JSON result.
ついに自由に - 映画『グラディエーター』より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124b2b13334d15a4601520824bb59bdfc90ae1c650975e1007192f5bc97eecf1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01705311 — a six-check JSON result.
レット・イット・ゴー - 映画『アナと雪の女王』より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7438a12def2ee057d40abcb23ef5949aa7c59d6602ce456199268c99b45d5b1. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01503238 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b55a11768e62daada413d137803f4b8fe6228b89d202f561aee62e77a18edd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01510320 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf131ae901f747cd93bc85c89a628a6dedf68d35271c2b80345dc1b2aff096d09. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01510322 — a six-check JSON result.
The Final Time Traveler - English Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515d1871aa4e49e7a66412d4a6288cc73eaa6c36f9e7d83149cc3201a6cba25d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01410053 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899579dc6217eb86fb4a2395b13c49e7d29e92cde310fb7811cdaeab971762f9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01805063 — a six-check JSON result.
ディーヴァ・ダンス - 映画 『フィフス・エレメント』より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc133769e808f8e7bc9c11616be0ce1aa43f750b3e652d84e3c86efd067b1e99c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO02201543 — a six-check JSON result.
Beyond the Sky [ゼノブレイド] - Bilingual Vers. LIVE at Tokyo International Forum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41620f07c22e715437b503f5d75ce78f66d45c6bbfae56900a4ab7ce1713b145. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ442400016 — a six-check JSON result.
Beyond the Sky [Xenoblade Chronicles] - Bilingual Vers. LIVE at Tokyo International Forum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41620f07c22e715437b503f5d75ce78f66d45c6bbfae56900a4ab7ce1713b145. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ442400016 — a six-check JSON result.
闇に咲く花 ~The Catastrophe~ - Heart Of Gold Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c125505eba35b7d2f909d65955a8ee398599ffd11acab431461c922ff817c5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01707076 — a six-check JSON result.
闇に咲く花 ~The Catastrophe~ - Heart Of Gold Mix / Single Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d62c4def2b0f37a93f87caa7283ea5c0bcf5e9b28845a11de7ad03081c93d3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01707079 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb661b533fc90448ca56d102563de2099366ada101c0bd0f6c803e8c6c7e0851d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01705813 — a six-check JSON result.
Merry Christmas Mr. Lawrence (Somewhere Far Away) - From ''Merry Christmas Mr. Lawrence''
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08846c68ab73e78578248f58900513291637576bbd9a8471ddec281f2eee96f0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM72000650 — a six-check JSON result.