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 0x1e9e1402673bb5ada54b8df2954c090ea55a17a56bb6e496a1f393d38e3f876f. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6b120f5-16e7-4b66-b281-b65002bbe5db.json and https://artists.proofprofile.net/proofs/artist/c6b120f5-16e7-4b66-b281-b65002bbe5db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ひな祭り〈桃の節句〉3月3日～節句や行事に聞きたい音楽まとめ♪～
うれしいひなまつり(ひばり児童合唱団)
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 0x6a967c4840c1198f354b6dc90aa42b16285efd7e26ca5766ff34a75af7dab8e7. 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/JPKI09017580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4155fff8b9b8b0bbc777263a90df63b5d1fccf95dea0abdc50facf2aeb5bc5. 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/JPKI00506987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd71174d57268b97c9cb6c87ae9af74859ae04222b772addefcb0a5a1e8e302d. 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/JPKI06633097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e279dd281ece24141c8a3a3d81566b820a0d79e17f6e5e7f21693a94e1289b. 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/JPKI01413035.
うれしいひなまつり(オーケストラ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ffd3a81347e1360ce4dd4e494ca6027a47dc93d2f640044c47b36e9b3f411c. 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/JPKI00311597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494c2285696cc634d659c08b1de0f54001771a2d0dfb74f53cc759ca03788d23. 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/JPKI09818080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f0a0e634651d69a8ccca02174259e5db992beedc1e55f237219b3d048a6c6. 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/JPKI00309371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49838acca62c0840194c27a6051b548bc3e5a9a2b72f9d9778c439233f06a3a. 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/JPKI01218387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b831684627093b4180c9e028be01ad2424321dc8a554b4997b29200d9b7353. 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/JPKI07972463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c33ebf46921bdadcf6580f8b986e8eab1386be3912da1e3d44c715041c70aa. 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/JPKI09120510.
ムード・ポップス・オーケストラ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcded454f87c30e0157f18539d9bca966c77030521c38df122007ba52c63ad747. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPKI07253924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08560537860db9fde37b49ca76b00e221444850068133e056f2191583a4151de. 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/JPKI08074506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0922a0d615a2a493d67ca5e715763edde726b1f472298f7d3717c5fa80751b. 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/JPKI06427183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e03eaf66f10fd2adee86227022944a559514a8229e4198132a5326010fb7ff. 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/JPKI09724850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf310ccfe1274ee376d84aa5fbefcf58bd199bd0c632191509778cefa5f337da4. 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/JPKI05713274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38ab0cf0cd0f96919f78d3fe82e5633f36d598bbd01a303df53be765c0b9298. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPKI06942794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57f46eae4e380c8b3e76cecd33c08fee42cbf96c262b118a79ab725091acf86. 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/JPKI06425600.
うれしいひなまつり(サカモト児童合唱団)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14f6a8c9b868757e2b18dbdf54d10d25888ad9e5426218d4546a4ae462387aa. 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/JPKI07046939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f156c491baa6df3cffc88c655d39274ef7a54fb94cfdaada462fef9f0c9c06. 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/JPKI07663276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567be6610e7d0693e1734792f9ab6a1a95cdc8c654ab9926c73a25cb163427f2. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/JPKI07664113.
レディス・オーケストラ・ジャパン
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df8627a64d0be987ccaff91904f379bb74f5692549a13b92f13c94eaf73296f. 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/JPKI09219810.
こどもの日 5月5日(端午の節句)～節句や行事に聞きたい音楽まとめ♪～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9600479fe2356e52172f290b488261e6111f8a8f1c6d3c1b7ede20873bfd8085. 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/JPKI06941763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016e4905ffa6412aaa932e38ef8890e1bd7de87fa3317e13c684a358a89d4624. 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/JPKI08692357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f27fb73438219d4acd0f817753945d3d8059753c0fce5f80cf4ffd78be9cf8. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/JPKI01715841.