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 0x8a6f7daec4299cd3853cddcea00115acca4f4b47908f6e5105169aa5c7a7c42d. 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/61fe3c8e-d80d-4c96-8451-156b6a3e3e90.json and https://artists.proofprofile.net/proofs/artist/61fe3c8e-d80d-4c96-8451-156b6a3e3e90.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 0x8bd7a272ee7f7ba70a183875c9feef6b736af44d547a988a1f01e782629201b2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPM792002360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb449c94ddbdd9d557cf0ba2188e68957a019d7da5b887ee6aa43dbc20396b966. 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/JPWP01770222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb260ca85c92ee30e1ec00b4d961db51919dd25699d3bdaea2f478aaf875f69cc. 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/JPWP01770223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511bfb0ba0f5fe71f34ff83eda006ac29495df54d4193e98263559633c809c1. 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/JPWP01770228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc039b19196033906409a6fa82e2eaabbd8cd6a94bcc8425816b60ffe73e2fb3c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPWP01700755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dfe39946121a9c7d15289d3691683aead6ca78ea3f93923c079e520ecb321c. 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/JPWP01772215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07575078b3073ec334d4ed1fdf49a42c119efb467d930ef2c05d9604d8dc4ab1. 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/JPWP01870082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a8419fb8ddb643e89bedd1c43f6712e6647980a7a7784a484d454a4e9eb6a. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/JPWP01870756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811d32d90e5cfedbcc1dfafd27df6e5bf0ea82e68ef78e72369b23d6e02bde1. 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/JPWP01800260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0942dfa1e6aa3a942790b31d0e76317026e343d3302032abafbe83b00ddaa35. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPWP01870080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0056a6a6875b1348352ecf1b858c73a479adc7572a801bfdf4b7fa55ba9342a. 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/JPW461800182.
ピアノの時間～ファンタスティックなメロディ・ボックス
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043d476f62e4613bd1731a0c195fb4542dee7e2576359cfd56153d8d8eac209d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPU901900895.
おいでよラジオパーク〜どっちかならYES！〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac47a597311dec938743e588c393d7b73d9554aaea4b10a37f6b90df8518705. 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/JPU901902283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d612f7e8c356707d4fa6974d1b164cd8fd70c797854232e9aebdba70000c6e. 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/JPU902001879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cecb0caf46a0b6d6a71ae613442a67ad61ffa4391b1a79e610481bf58ca16a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/JPU902002644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe532e0c3360b527573c60c52616a745db4e4d9424afeae8bbf44d271a051dd9d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPU902100870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf818ba356f4cd659f4f989a6e71c38e286c251be4c446c9b5f5c49655806d8d8. 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/JPU902000732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cecb0caf46a0b6d6a71ae613442a67ad61ffa4391b1a79e610481bf58ca16a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPU902002644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3db84ca822fc845d9024085d16fa5d30de68aafe449653c005d578a6b46ec4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPU902101631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262e92d6b2b9f95e7c3b6f3952dfd6254ab2f53680864bf4a64f6bb4a817a08c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JP92L2201750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667df4b4a90c0247fe822560f02c53c3d0be59cb65727f8317c5b4b7700ff2e2. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/JPJ902305750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b710da91cfc7efa03118f8d05cff99d7b9e36f4a569a77b9dbed132809dd1e. 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/JP92L2305860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8996b8296f26726c7cc1a4aaad9552b9ef800a9675d6a861d7b705ed6836311a. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/JP92L2201780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262e92d6b2b9f95e7c3b6f3952dfd6254ab2f53680864bf4a64f6bb4a817a08c. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/JP92L2201750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7ec15487c60a477dc21765582288872f1882bc8985a2cfe0e2f73291461443. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JP92L2302130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4245f7da0baaa60daff1e34652c2dd044cbffbcbe9ecd53bcec48dd765141ed3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/JPB622401524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2344a28613d658aa3575bad73f81485432328da3a8104e5db7a6978835c7a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SGW502581351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa419fceecc4dc270cd4d0965bd33026990bc511d8bb15c40647bee666e8804b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/JPB622502263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4245f7da0baaa60daff1e34652c2dd044cbffbcbe9ecd53bcec48dd765141ed3. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/JPB622401524.
不完全な僕の声と君の完璧なダンス
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4247bafff6e66a19e9b214798cb8cb8a983d9f31c5ab2caf8b544ea7d6a716c6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPB622502369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa419fceecc4dc270cd4d0965bd33026990bc511d8bb15c40647bee666e8804b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB622502263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05859374b573843b0dcc0bef28f95b1aa43dba5fad26568a8d82f6cf9aa2ed17. 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/JPB622502370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97137bb7faba82ca120633476f2fb7062c03d7d22a9eef8adb98b688f53246c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/JPB622502371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aa7d8952b8aa5146ad834b0a1cbc6ce56ebb2ed5aebbb4d84a71a294d14678. 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/JPB622502372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268038670b6449fe31bf33b02ba85fafaa4b36dd370c96606cc862bf23e731f6. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/JPB622502373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56a8e5400c3a646fc6b449265b4c79ca7b895c61360cd72bef6d4f3231ed0ad. 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/JPB622502374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf969809f07485da84cd99d71f2b400dfe38bf9a248f3e9ed7adbfc6d76aebfb7. 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/JPB622502367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2344a28613d658aa3575bad73f81485432328da3a8104e5db7a6978835c7a. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/SGW502581351.