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 0x890d5d54001f7084280ddb373ecf2ceb4ed11369ce88db60374bb0979da1e8f7. 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/2c444966-393c-46f3-94e3-9753a1ab316a.json and https://artists.proofprofile.net/proofs/artist/2c444966-393c-46f3-94e3-9753a1ab316a.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 0x972f5e3dff964a4e751b164f03cbbb37f2b0269a8c1e84bfdb23bb55166d1f81. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPQ322200160.
Touken Ranbu：The Musical ”Kosui sanka no yuki” (Tsuujouban)
Hana no ame kimi no nagori song by Yamanbagiri Kunihiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ef916ffc8853fd4ac68d7b3fdb34887f060b2e300ef53a00c06485f5ff97d9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPQ322300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057688b40dac07260881ebac92e2ea41617f44448a05d146c1074eeb1f34d76b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPQ322300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972f5e3dff964a4e751b164f03cbbb37f2b0269a8c1e84bfdb23bb55166d1f81. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPQ322200160.
Super Duper Day song by Koryuu Kagemitsu・Nansenichimonji
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e38a9600e979da801574d79b08ace5423102441f3d4cc49af0796ed81dcb3a9. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/JPQ322200170.
Dakishimete ame song by Izuminokami Kanesada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ddad31893a6e34ce3f4f9567a900c79c2f8e59194a1c4909d7958063a62645. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPQ322200161.
Burn Out song by Ookanehira・Hizen Tadahiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86330fc19aee0a65fc944d1b944343a0d51c27706ddf268e8bc75712b55fd20e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/JPQ322200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f40ff30279009a45973a49831b242c335cac676c6cbeb4b80c8781da1c33553. 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/JPQ322200168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4622cd04837937d83c309958d87ae3addf4d77b07f1f9a8a5ae94c988ec5f9a6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JPQ322200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616a4c1a6025dad29c13308a2be6ee0d5df1c6f8f5c6f65fa03b3f0ddb506441. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/JPQ322300014.
ミュージカル『刀剣乱舞』 ～江水散花雪～ (通常盤)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2e4d030a0d2507e83d9ea8ee4954d148d8baf26f8a58a972fa7a2c895fa750. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPQ322300003.
我が水戸学 song by 会沢正志斎・吉田松陰・小竜景光・水戸の人々
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f0f303f27398ecaca5725c2600919b819591d0358d46f0118c6edc77609a8a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPQ322300004.
昼下がりの雷鳴 song by 大包平・小竜景光・南泉一文字
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00348dcc318ad5be888e2d8b74833ec15ca01c817ccfcffba0b7757df008f298. 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/JPQ322300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0041ade99ade96ede5f7ed5f163222f58c7b5e98ee58e754fdcf60d183ea1e. 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/JPQ322300009.
不正 song by 和泉守兼定・大包平・小竜景光・山姥切国広・南泉一文字・肥前忠広・井伊直弼・吉田松陰・ハリス・徳川斉昭・一橋慶喜・水戸藩士たち・人々
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84ebb4e8517e1bc4aaf09197d4120cf80c42bcb2023c192abe7b8e1c4ea8cad. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/JPQ322300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb2ee7f7cb08a88bb8037bc6083aea556ff990c66c8244f8c3f88e8e3c1ceab. 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/JPQ322300015.