thumb|A zun with taotie dating to the Shang dynasty thumb|A rare Xi zun in the shape of an ox thumb|Western Zhou goose-shaped bronze zun. National Museum of China The zun or yi, used until the Northe
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e63a9364a4390c782ad9ea9a1a18f16c94453a7184df38039d83651381ba1. 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/9c34cddc-4a92-4f97-8386-a989aaf882c1.json and https://artists.proofprofile.net/proofs/artist/9c34cddc-4a92-4f97-8386-a989aaf882c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
獣王園の主題による小曲集 Op. 20 第2番 世界は可愛く出来ている
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36c80ac0a5af5aa0e2ae773f56c291b0e7a6ab1a6459f0173b841dda42b9250. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPW562110408.
獣王園の主題による小曲集 Op. 20 第5番 タイニーシャングリラ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd1f8ec3d89989ccdac8a31da9693c67fc49363c48851702726c01cc359f4aa. 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/JPW562110411.
獣王園の主題による小曲集 Op. 20 第6番 勇敢で有閑な妖獣
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f73321514c75ef675608a63b22ad717f42d57eb0e1c54440dcd457ea6cf927a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562110412.
獣王園の主題による小曲集 Op. 20 第10番 少女が見た日本の原風景
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954f9dc0f6d51cbfc91482fea522ad5c432bbe1deffc23dba6ce39672510331. 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/JPW562110416.
獣王園の主題による小曲集 Op. 20 第11番 妖々跋扈
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84934ddb7ae148b263c25eff855189c78e86516a9c2a39abf9ee1faf0511fd45. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW562110417.
獣王園の主題による小曲集 Op. 20 第1番 獣の知性
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e7830fff0f6dbde6358eb2d8cdbfcd00af4549c8fb31e7d6357e054ad15c47. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPW562110407.
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
獣王園の主題による小曲集 Op. 20 第3番 魔獣スクランブル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89f30de60baf80832634eca7e5f7f5611978e4108e0061943b1243a059f6928. 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/JPW562110409.
獣王園の主題による小曲集 Op. 20 第4番 鬼は悠久の山に
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb28489efcd1f994ed1f56e1d64981333d1f0335fe7ecd8aaa307e4b7245b27d. 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/JPW562110410.
獣王園の主題による小曲集 Op. 20 第7番 吸血怪獣チュパカブラ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86966c24c89a779c09d25fe5c964a1264716dc1f1164072abe76723a3689e014. 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/JPW562110413.
獣王園の主題による小曲集 Op. 20 第8番 振り向かない黄泉の道
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20277c725b62b9241c6e725e1d46682dff7d7f36868df0570a2c29694c22a32. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562110414.
獣王園の主題による小曲集 Op. 20 第12番 春の湊に
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e6a8e132f06886c48b61025dafa461bdbe8a0e2bcc4abd792d80a8a66cf854. 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/JPW562110418.
獣王園の主題による小曲集 Op. 20 第13番 忘れがたき、よすがの緑
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc67300e14574b5be85f4ad06b705e06e3d9a44fdc0cd0e335295498d9c4b1cc. 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/JPW562110419.
天空璋の主題による5つの小品 より 第4番 間奏曲 変ホ短調 Op. 7-4【一対の神獣】
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb623a1cc9f9c0bbd79ca1e5ce0a211054096025eea009b419f558a5ae12de845. 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/JPW562110422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557ab8230ccdc14532e15682681dc5bf1664c2f24975f8d754848197d68cec51. 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/JPW562106067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb10174ed46f575785d5b2acaa5608f505622ef371d2b75bf03bb08d07c60f2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW562106068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0361a560c082449111b30bdf4dc9216261b3a92bd611fc841cac3b39c63fb7b3. 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/JPW562106073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bd85d6a54751376de24dcade47850f4b8753cc61bd7eb8433be466dd73c40e. 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/JPW562106074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8012a2ab9b809bcd3f18342c086215f3e84be3b3f2dc4ac62dce5455ba2b6b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562106075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf50cf19b47f6f1597b000a01ad9c5e577b0a9e1126522811d7b58219452970e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562106076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe132fa26981e3745c2c8d0c4421d37a506c9261cca3e3325796f0fdddf699afb. 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/JPW562106079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a04a298b30297089aa37b5ca685c1ddf0a57b97521793340446db18379ae4b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562106081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c01b32c975caef0074d49fc2eca743a3e40932b48fb20f007e95c11f931a223. 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/JPW562106083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd329e70e8a5868032eef4e9842a0d583f648ce50d0fa4529ace778f2010c8160. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/JPW562106069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558f61c3456e01c8572677f0fc384cfa54bb968d57901a7bd6c211abd8afc31a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPW562106070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d84dd8f993fbc8a110e3fa2576e9a0ab28c152155de90d66ea44479567b1e6. 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/JPW562106071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8829d2e1b280d7ea7cae3bc12bda461fb7b66934c2fa50b5b0d4a19926d55f. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/JPW562106072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572a49f8516bcc7dd7680f6664e4094ffa4110ba6241d3d3814284aeb4b6f05a. 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/JPW562106077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aea211f5111a8f873ec4e013565caa816dd38d1bd13b472d6ad8f2589733e7. 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/JPW562106078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42596d8abf29740e1ea12ade2b7f36e9dfa91bb88cd91fc39c51a8dc66274b2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPW562106080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9ed3f592a88bde9d33a9c01a5fbe60367e1d426e9cbf1a15dcc433f9206255. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/JPW562106082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc931b950b9cc2b1613807999a328ad2efd2746d14f02111ad9de8cb5be4787. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPW562106084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7046d7fa28bb6b798be4511a1168cb5a8b3a0a5f02bc86e8360cfcbe6d55fb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562106085.
バラード ニ短調 Op.1-6【神々が恋した幻想郷】
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ab24ce5d2ffd548aeebc4f92ef5af71281260040bb6f0464d6abeb90e6789. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW562106086.