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 0xbd9a9a319a109af6a37f70bec12d1f1c8d82e9ef0e7ea20402cd16da19581dd0. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89c620f9-072d-4b84-82a9-a0db5e25b3a9.json and https://artists.proofprofile.net/proofs/artist/89c620f9-072d-4b84-82a9-a0db5e25b3a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
朝の都会には乾いた花がよく似合う
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 0xe83645789773359a828ee26fcbc546a61a86c9fbb04dcacf9c237e201d313ef3. 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/JPCO07386680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa639a83df0b9f95ccc1e991e592f8d5e0b5ff5b7a59b946e5839e7a66bf826ae. 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/JPCO07386690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ca931a4a9cb7c3cb7adcd41f108a41b729f1d4a0478dad57263e6971eaac14. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/JPCO07386700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6f11cd0911b7f45e3009dd78a30238009d99caf4dc8d214f32301acbe9abff. 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/JPCO07386710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaca139094bd1b06d0304ab7fed8956fee02b92fc44b87ccbd12a81f36da1759. 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/JPCO07386720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986dc1f3e53d60d958a26ae79cc55c977676e5669a048ddbc8d2ae014c2e0bdb. 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/JPCO07386730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3703f122cc26e48cc1ffa52612e670ce2c716b0206ec8b3bd0bd1711ec5d8af3. 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/JPCO07386740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf708dbe8680d80e24cc879ff477faaeee6b23c56e730af3481d4198ef9519913. 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/JPCO07386750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a55f7c19628a831652947cc54ffc71bf509043599636af423ab2d95dc5a2d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPCO07386760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00106c4f67653e09897c1902a7e63718f17a809bde3f89bf4d3a26bffab8aa2e. 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/JPCO07386770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7041a91235f887f78891f02f19f40d2c34c6880eb3318170d5dac9874fad7eb5. 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/JPCO07386780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e5a2c24485de54765ef88b5063f09da91b6f6c35ab6cc2ca0776f4fb2bbbf3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPCO07386790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a957c3ec345762d0d73df0b468ac6697ae730faf02b6b2d866dbbacc37c7a23. 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/JPCO07284420.
スマック・ウォーター・ジャック
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef37dacc1d4e7dbd7c2ffe1c0c79e6c1a5150984c594e6d5550a2e3e54e3832b. 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/JPCO07284450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0967672da39e706364d06e73da68b67502b7e800f7c952c9b380de8bb7121375. 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/JPCO07284440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3309e864be83807126195c3a14a3be7505dbc2642166b54d8c6eacc0f66ca7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPCO07284390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d4aa2b128bf95cec572db06bc4ea1005906026e1980cfd9dd36f5066228557. 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/JPCO07284400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95665a63fd14ced5fa1d6b2893eeb46b35fc01e7e8fed620b1bd3b72160eed8d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/JPCO07284410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a957c3ec345762d0d73df0b468ac6697ae730faf02b6b2d866dbbacc37c7a23. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPCO07284420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d53d73d93058c1d9d41a3f3e21a48d33b1e06a2e266000ee224c63982b9cfd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPCO07284430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0967672da39e706364d06e73da68b67502b7e800f7c952c9b380de8bb7121375. 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/JPCO07284440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe835fdba83420573b33a6a25ee1f647b6e1923679ff46854783b56214b00e691. 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/JPCO07197970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734a665b762fa6383c3eb3c37c4e0c91acfe43df99af711e4e70e411ce2bf6bb. 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/JPCO07197980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af0d8f6301351199951be091ae71a09af6ad08c218024def802cbf428d8ae3f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/JPCO07198000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9565a4d16ef7fc157907f5b73852e220884bca2ed4dbb74b231dd6332dbc9f7e. 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/JPCO07198010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc09e331d668725ab7884e0fe120f1886d697489bfe4cb0bf4415ca04d68bd3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPCO07198030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06e999237eac7e9b63a9989afdc5822df29dd9b8adf20955f42869ed2287aca. 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/JPCO07198040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24299afa070ad01cfe02ddc70855beeb54bc7d4d84262c8309ece120d6211e90. 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/JPCO07198090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e86543b7309f85bf34addade4985f12bbfc5049fc91654fb8a61767fd2b241d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPCO07198100.