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 0x179168bb86f71265358d6fb35071a7ba205f0ecca3557bce4ff6b0d52418dc45. 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/42937f55-2f69-4293-bc44-038d4af4010d.json and https://artists.proofprofile.net/proofs/artist/42937f55-2f69-4293-bc44-038d4af4010d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
宇宙ネコ子とラブリーサマーちゃん
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 0xabe371c20444e3582d0c6f303f2f1175c1ab1f50f8cdbe344c7ca90776e378e2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:28Z), 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/JPV251800461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c694df6fc8649157ebcde213a584cf96facbf6213e3afe862d1784afadfcd16. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPV251800462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129955de5d8ec4381cd2a404ed23b810674a338b0cccbd9e7a9f1d36e58b8f96. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/JPV501600467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e396681234fb0af499547fee90b740508959a6fdabbc204c28b8fd0605ccbbf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:22Z), 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/JPV501600484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a5092151c993fed83a211e76d938808c1df4df4b54f0e1bfd5f1e02a8869ce. 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/JPV501600463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fc6cbd762a91b0e27470db910a07e8a9ecfc0c03eb482215d5ec59ef5099ea. 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/JPV501600465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6771f9fc7618791c3ab83eb53868204d65b528326c77e86ca3e40effb74ae5e. 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/JPV252200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe959adff9aaf20a0ee96b166bd4e749694d6a46589e421389269bfb1a6fa4475. 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/JPV252200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547ff0ad4904f4f5e0954b7c2e36aa01e4eec84b146ce975f39db52a7e4c6a7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPV252200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9d64cb638385a0132f06d52432ff961d1aed31b597c3b45435d50d0ecaf2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPV252200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34bfd851d82648f7431a45e8472a40f6d1f8937cba6fff5301ea7df9e7e75ba. 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/JPV252200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aee8689111e4addb2ec8bb2a50cb4990f8c88e9085c1dab068a578de40b015. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPV252200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc88f144a1e244544a09b70695f15428de7e9f630f3f0855d96936539dae3a9. 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/QT66K2550350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6771f9fc7618791c3ab83eb53868204d65b528326c77e86ca3e40effb74ae5e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPV252200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe959adff9aaf20a0ee96b166bd4e749694d6a46589e421389269bfb1a6fa4475. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPV252200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547ff0ad4904f4f5e0954b7c2e36aa01e4eec84b146ce975f39db52a7e4c6a7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPV252200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9d64cb638385a0132f06d52432ff961d1aed31b597c3b45435d50d0ecaf2f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPV252200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c1a01c461cb52faef9cedc1094ebacb8f4dc0c9fc9e7e834980656dc971cc4. 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/JPV252200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34bfd851d82648f7431a45e8472a40f6d1f8937cba6fff5301ea7df9e7e75ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPV252200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aee8689111e4addb2ec8bb2a50cb4990f8c88e9085c1dab068a578de40b015. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPV252200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb759b949b504b17f4cad9879d63b56251ba6d9e4c320f7a5e7a08291e66585c. 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/QZES72306189.