thumb|Karatsu ware yunomi, stoneware, Edo period, 16th–17th century A is a tall form of a Japanese teacup, typically made from a ceramic material and having no handle. Description Yunomi teacups ar
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 0x565c02e94a7179f4a9f7095c370d373db9ac4713bda6a3b0aba66df9443dc5e0. 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/4ecfeea7-b145-4141-91c1-8d9aafd5d2de.json and https://artists.proofprofile.net/proofs/artist/4ecfeea7-b145-4141-91c1-8d9aafd5d2de.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 0x3440cba4c01b32895251880a893fd8f0a5b9a7a1f0e2ffab2c7949aed3be3a92. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPX301607270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50688f6c6f04ed653128a64366cf845ef90312d40314a926501e4f442b68791a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:57:04Z), 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/JPX301607280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26645f47559e201c84c5c7a84f0c384a10f558c0dcff5d06eb67bdd437a713a5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPX301607300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665a96eebbc30429ac31b59857361adf404bc369dd53b34333604032916d26c7. 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/JPX301607310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5e71277ba7ccb7233b80f2afe99a340e2529298e8b019e4ac26a4669aa493f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/JPX301607320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3440cba4c01b32895251880a893fd8f0a5b9a7a1f0e2ffab2c7949aed3be3a92. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/JPX301607270.
Akenai Yoru, Samenai Yume (feat. nicamoq)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50688f6c6f04ed653128a64366cf845ef90312d40314a926501e4f442b68791a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPX301607280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa902d38a0847884ef00fcec7be8388a0d8ce13fee3750a1495fc2a1815ba90a2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/JPX301607290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665a96eebbc30429ac31b59857361adf404bc369dd53b34333604032916d26c7. 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/JPX301607310.
Oedo Controller [feat. TORIENA] - TORIENA Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfd587c2178ed2447cdf203b99d8fb80c26d681cfc1655ff9a3e1dc5ae4b585. 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/JPX301708550.
Bamboo Disco [feat. TORIENA] - TORIENA Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f202d8188a7af58946acf5f12eb49866797245b52180d39f9e2ce9a2e98276. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPX301708570.
Sayonara Invader [feat. TORIENA] - TORIENA Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7d3eabd574d909c55eedb72692b817b1dd6cd03f993b1b9cf01c762b2649c5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPX301708580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ffac0e10fc7a52ee8203e546b321020bc2c10101597545012783795cd2db58. 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/JPX301708540.
大江戸コントローラー [feat. TORIENA] - TORIENA Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfd587c2178ed2447cdf203b99d8fb80c26d681cfc1655ff9a3e1dc5ae4b585. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX301708550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45df0ee8aeab4a690f0f52f0159c57dad693f149512f9a2e3fd8c54600c3029. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPX301708560.
バンブーディスコ [feat. TORIENA] - TORIENA Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f202d8188a7af58946acf5f12eb49866797245b52180d39f9e2ce9a2e98276. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPX301708570.
さよならインベーダー [feat. TORIENA] - TORIENA Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7d3eabd574d909c55eedb72692b817b1dd6cd03f993b1b9cf01c762b2649c5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX301708580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098523bf060206ad131c03ae7d8766b13f660cc6065ee96be0dc522cff52e563. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPV751700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb601ff27c9f8fc9acc8cdf8a11cb72b205a79d3876265cd2503bfb939fc63574. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/JPV751700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbd12b5319cbddbafa1f9c70411836a72c388b1f37e5bfd1bf4a38fb67058e9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPV751700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a0e7ca669a42e602987edc9cff22da715f73fb3bd2cc06dc7897a0f7ee57ba. 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/JPE561703618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f7b42689eed65db0ab8ca95b9d3612cdb492b2f6d4dd69e177fdc0e8df6462. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPE561703627.
ジェリーフィッシュ (feat. ローラーガール)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0caab1b78bfae22f9e707ac2002068cf6ec412c8c9902eade6164d648f5605. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:21Z), 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/JPR841900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35bcfa716dbdabc676bea90fd167f08313948a2b8d36b35b8c4707703357871. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPR841900188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35bcfa716dbdabc676bea90fd167f08313948a2b8d36b35b8c4707703357871. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPR841900188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8ad3d69d4fccb52286e8358ce41d54733673b73a41899618d7ed1786f01506. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPQ462000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37e52d26564c98a58db5b9f60c5eacc86027b4f62d5c9aa775487ce2afc949a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:35Z), 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/JPQ462000194.