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 0x33fdaa61eb31eec32b0db18eca6695f3f305f4e81f21774335a7aea3e23f7a14. 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/f6caad16-4c3d-4872-8951-70f49cbb82d6.json and https://artists.proofprofile.net/proofs/artist/f6caad16-4c3d-4872-8951-70f49cbb82d6.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 0x754852912cfa0a31f29d8efa0652728aa879f1b42b567d36f6662f1443e2f6cc. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPSR00100641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b322bc99edfffb06213d972adb0d11e2f7688c366686b804bb98558ef5b509. 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/JPN300100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da77029c665dc79b964af6bb7404aa38ea15dd6df3bcdf7a7eaf2ec29f81d63. 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/JPN300100242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4d4398db7eba99f0a285841c5d0d6a5888d67783d2779c29f636b58223ce4c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCO00520470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e607e4bacbfa2316f4cf784e1808663956a0cac6ba69cc6fc0e04c8833a53b. 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/JPCO00520480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83065ce2f9c641566c9676f4bb58983776415877e233de673c4fc444ca69e7b2. 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/JPCO00616390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5001807233cefaabc314044db19ec85c03436147d5b6bc91665d7f964702033. 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/TCJPB2491588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1558114671c8d31db7b34f75dfcbc7ed64ae5fccbb577e7c42492f0152c912e. 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/TCJPB2491600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5413cf7dc5b0d7f92c81e066f11ede97ea7344bc49bcfeada12dfd5241f899. 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/TCJPB2491622.
Checkmate Pt.2 -Double Check- (feat. GOCCI)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2110f8af45e664e41fe91f975b804ffe051e8ff6bb839986b4419cbeb71ac078. 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/JPZ922105461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863e3e059e692b94c38fc838ad9d9c21fecaff75cf37c63158691e5aade4d2d6. 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/TCJPB2491627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d466f7511bcdee9e2e87059aa49c7182c968f6bd89e110b7998ae933a23ad9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPL2558472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c06a749cbd5322f446e6132a57744a9ccad29ec30f6ee5c72eaf2f95c267d5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS809915822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1354fd2bba3e9a41327580c4278092fb1d23af2988fac630b3d69a57f462040f. 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/JPTO00501771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a36c2623605b3dde90f9e45910267ef00a7f05a12530acd3bbd3ae5808a9df. 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/JPPO02102232.
Sweet 90's Blues（後方確認） - feat.K-BOMB, SUIKEN
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c35a1cd8888dbc5f879f3e99af77dc383f4bced56851bfd9c6d2af3a262ac2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPTO01001423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6b246c3e51c36beda228305a51b1456864936df14bff8b37e7050c8a5399be. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPPO00260290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74602ec39613f594eac8a9f7a1bbd6a14b76bc8935bb9b5f70ce7c1acebe702b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO00106780.
Live 09 (feat. BIGZAM, DABO, MACKA-CHIN, SUIKEN, S-WORD, XBS, DELI & GORE-TEX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce89868de6d67718a1691b8ee54ed173593ce9e94d5a9d06b25c11945793e82e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCJPI1992865.
Straight from the Underground (feat. BIGZAM, DABO, MACKA-CHIN, SUIKEN, S-WORD, XBS, DELI & GORE-TEX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540075c37a1ff5d0a0b95a6b5bd5f7a635b5e90b0ea36c29623240e4660075f7. 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/TCJPI1992869.
Special Force (feat. BIGZAM, DABO, GORE-TEX, MACKA-CHIN, SUIKEN, S-WORD, XBS & DELI)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c433cc993db3ee3d6a289fed1ddbd29b5070ab0e00f4fd9a8b3c6c546c2a49a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCJPI1992875.
Watack (feat. BIGZAM, DABO, MACKA-CHIN, SUIKEN, S-WORD, XBS & DELI)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b92fd97f9ad549da2a2ff137ada6b5bf9a40a15e88c39e6861f100c56d04464. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCJPI1992877.
Nitro Microphone Underground (feat. BIGZAM, DABO, MACKA-CHIN, SUIKEN, S-WORD, XBS, DELI & GORE-TEX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34bfd7947039f24af46653934f2ab99afb22aedd9d5bbb2fc8c743e72678950. 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/TCJPI1992879.