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 0xe1e7af3c1092618d316fb16040fd4751b83f3aed67c4475a53a7d830a67d7d93. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8f5abf1-7f49-48df-a40d-e71f8f73b688.json and https://artists.proofprofile.net/proofs/artist/b8f5abf1-7f49-48df-a40d-e71f8f73b688.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9428d62478620eb234c7a09d4620362b255e5624ba7ff030c3cb1ec0bed2104c. 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/JPB622201162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7203bcc6ea6c51e36c75039630b916387d6b99f8f1594878dd3dafed47f0384. 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/JPB622201163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2772e58d9255112c1f74edf7bc63cc84d8fbbf44d3086e8d37c2c1629f06a860. 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/JPB622201164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f65e21fd10a6f26c2f2c57ecc761babe35abfe0d60b0a7aea815c749a5a93c1. 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/JPB622201165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cc37e4f87a25d48bbaefd547e86d96df2407a00fc95016496853f4a3e30886. 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/JPB622201166.
回想録 #2: reconstruction feat.Eiko Ishibashi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d79aef7d1ccb317dbab5ff57585e2b66735a057ed02d5e0c76b429e6faf70. 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/JPB622201169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7229914aaa91d52879341b3e3f4d4fa5eb193dc972fd3ae3ebc48d0dfdb6b81a. 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/JPB622201170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee997fdb189965cb14e87f3be38ed57a4cea2b41fed2e3baf4cbbe899d924c9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPB622201167.
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 0x6f0a2f5f3cd2abef57656a9551071b440000e702346032ecea990c2a3508a463. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPB622201168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7192ad2779fee95421bacf35d88f280c8f394750ac8eceaa5bb2dc51d6f550. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPB622001482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b113f97298804fd26e1f852200185ccddcc0a2c8e502056e82cf2db779db0d. 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/JPB622001483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cd236ad6d6315082729567440c393abf3251eeb8933cb99effb97f0aa25708. 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/JPB622001487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944b599556d60b0669d992109f38339a0984dc2733eb91c4be382f661f3f2a01. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/JPB622001478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6271e18bdf19061e964b6cf6b0f52940415cd506de60906784be4c7a6bd379. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPB622001479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7894cd0cffbabfec9f4b769368beaca37b3946092a6c9dbc8c33d531356c7fcf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPB622001481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea3c93c1974505806503d47b078ac2f28e521fdf3dcfaa82ef1d0b935af2815. 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/JPB622001484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8190ccf4c296e6cd03b0d8a23d81aa24babea6d7e639f84a314691b251710d7c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPB622001485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5924d5670d1159a7634b82e61636f82bb6e0b3f5f391c3f4ab5c31b16c385c. 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/JPPO02301469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac4549822d306178a4aeb29ab297946ff6974b15c4f48cfe7f45b6359d22856. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPPO02301470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63997a069a7ced48abbead3c9458e7be9f19cd7ec8ac9e2b26d27952ae8b4b17. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPPO02301473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7376b142cdfec309e0275632c8ad877c6ede0e821b2eae769ed7509c6ccd43d3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPPO02301472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0785a276acffbf58b9a1976772596dbc7d1017789cd6f5d0599114b5d059ee12. 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/JPPO02301471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1b85b1bef6eaf4f7ec667bc76abb005fa65ce6a56d316156e6267b1dafc56b. 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/JPPO02301474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e93c20f71fff8d0a0234dc4b54bb0266322c29b75a97f987d53a1e6a916145. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPPO02301475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adb3982dd8badfbd27b3008a3369f33ab90a1dbc393d87a9ab9ad35dc522f05. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPPO02301476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8e81814817956807a672743987c493699e61d7f27dd690df13172fc57529be. 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/JPPO02301477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a705ebc8630eb1d95ffce53ad262e66cf7434043aa11c7fdd5ba25b1638a333. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPPO02301478.