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 0xc7de334a4dcd310e32a855fae9aae9140a52692eb0ca93243b606f04c8e218f2. 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/4d7d0e8c-ec20-46bf-9bbf-827d3650d5b5.json and https://artists.proofprofile.net/proofs/artist/4d7d0e8c-ec20-46bf-9bbf-827d3650d5b5.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 0xa1e88e8010b1827cb417acc3dcb890b8270b9320fa4562236b6713c2da09e356. 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/JPB602101693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fbb635c75f86839ff62b6a14bec754c87eb813fdcf3043d28f3072ad55bac9. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/JPB602102756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91723fb9e02b5a0d1fd045475b297806fd21e05bb5a6540aad1ef7461b7cf94b. 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/JPB602102757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b1865907033d1ee1b6acd9e7f23095186c668575a712ac8b535e9af7103a3b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:03:32Z), 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/JPB602102758.
ハンドメイド流星雨 (皐月ソラの場合／CV：楠木 ともり)
ハンドメイド流星雨 - 皐月ソラの場合／CV：楠木ともり
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9775c0de92254af1a1e57308cfda821de12b8433332cf13c641662e0f03c0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/JPB602104335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fa9685377b9398a4cb4b8c4c5aebfcca5e0b071dffed9c931633a5a3cc9053. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:02Z), 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/JPB602201963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100fc964b295b1cdd573e7db28194824662e08a706bb03ae324e465cdba50911. 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/JPB602202157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b49bd1dc87ff2bfb7071450ab2723d0a87afae378d27074838788eb0f60945. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/JPB602202158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c03233cdbe1c91afc8e1080c2af1cb23e02c5d502f2dd82aa32495a4b4610b. 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/JPB602202154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5569d08205fa59bd1641a86463b8f5e2eadbcdd93226a4c3a2966a65a05e00. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPB602202156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cfb71f746d46e8e225f431cc60a8671449973a9f07e4e6131c210579afdaea. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/JPB602203459.
八月三十二日(葉月ケイの場合 / CV:菅原圭)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9bf2c5d4a79e399a98cb43c16271379ef44c7b950b02890a468da1014d3d2f. 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/JPB602203460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff4a64fc2716c9a17bb813a31466cbf1fad3d229b3d9799270769b97b3d9113. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/JPB602300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d3ed14eb679933c5ed729432f87519c9f7823aaf720d1b1b2fc997fe3e0040. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPB602301030.
キミノイル世界線 (文月ランの場合/CV：綾瀬志希)
被投降拒否 (空木ムギの場合/CV：ファイルーズあい)
大人疑惑 (色取ネムの場合/CV：セツコ from 空白ごっこ)