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 0xf619d29f97e9487d7d0b1c8c8db4581fa0946b91a6cb6ccdbd6837f66434c746. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1582de96-a7e1-4485-8fd6-6783dbbb399c.json and https://artists.proofprofile.net/proofs/artist/1582de96-a7e1-4485-8fd6-6783dbbb399c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
U.N.オーエンは彼女なのか？ (6Tan Hardstyle Arrange)
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 0xd643e257c74386ee4f2c69ea08d1bfbf0e9ee97dc9cff607a5f0e70523524914. 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/JPW562107064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c2c967e54e75f6b279de9cc5bc443b8c889f1278f6a715749b16bdce7623ea. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPW562107070.
妖怪だらけの異世界に転生したから、そこに居た猫達ととりあえずニャーニャーまたたびぱーちーしてみた。 feat. ちょこふぁん
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae038d0d046927055852bf521ffe3ed62597a7bdcfbd1358e6f6d3d83af9cae8. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/JPW562107071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67d5f5b8729741982f208fd41047cc6cac620dbd8c25d21af7afc3a7c32e24e. 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/JPW562109370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b565567965fecd9b2c71592c3a78a01e940120b3ecccbedf0268cc12f4d4e6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW562109372.
うどん華院~地上の兎を添えて~ feat. 籠目サク&すばる
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08e5af04f7535050a734973ea98a95a5fb81dc1ee58aea792368547ccd489a7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/JPW562108542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deaff9e88c0dfcf18417b444eca2eeb6c62e038934eda7e4b877933ae70646c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/JPW562108543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dd62cdcd7f6cec73d071330653ed19c3796c05802cba3b983b0f19b141c01a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/JPW562108547.
こいしちゃんお悩み相談センター feat.籠目サク
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e79bc89939734887b566bfd8d37aa5d4185eb295b9af8c1482122205019329d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPW562111482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982d5369af2b85fb91e5d5b87b27205f492e1dc042da35bda0c24e71fad37247. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/JPW562111483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f58c26b5164ea2fc1aad383e722a6e70e81ec23c7f0d64ad9aa4e198c95275. 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/JPW562111485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9edceca04d7e8201413dba0efb6e6aa7990b5a9f64ee8e2ddfa1dc00167fba. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JPW562109364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab824d87dfa07a87f36efdfa368ae6869a6c483254268259d49148e34e2cd5b. 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/JPW562109366.
ストーカーの案内人に死ぬほど愛されて眠れないCD
全力前進！あややのゴシップ追跡大作戦 feat.miko
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83b05ed3f9dd0e59ae4f4c78dc7a5fd9ef7b11b82399d2679232ac75710bba4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPW562107795.