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 0x915fc2c3ea65fc9837627ac7e4cc0cab6a3e3ce7ddbfa10f299e27b46adfd8e9. 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/d2a97ee1-27c1-48c2-9619-85f4d67de914.json and https://artists.proofprofile.net/proofs/artist/d2a97ee1-27c1-48c2-9619-85f4d67de914.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
TVアニメ｢やはり俺の青春ラブコメはまちがっている｡続｣キャラクターソング集 やはりこのキャラソンはまちがっている｡続
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 0x2e7c6cb7e728259e01d068af99b5704a8c2f15e125ac6ee3c73e5a80bc2829b8. 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/JPPI01554470.
Yaharikono Charasong ha Machigatteiru.kan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7392a382cd10133313e990cb9ebc308485e1b894a1922d22f65eddf24476a9d. 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/JPPI02050360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35ab0b37d103332dd7a35e5960d20aa8660529c62936470071ba40f153b7bc. 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/JPPI01554530.
Yaharikono Charasong ha Machigatteiru.shu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8cf0ea4f8248bdad82b1cacf11dd6f49388471c19e356a1307e9eb5088409f. 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/JPPI01352910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4268570dabe9cce7c77e4d017a9ca83a308ab33952c3816cc9893994f80d5349. 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/JPPI01351260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1307ec9f99269c72101dd073f9e592b968a8713a299e3c301966b21e726610d6. 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/JPPI01351340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64c925bf94b866b6538c862c2947c93eb6ce9f8c3195625cbd3d313e1dece5. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/JPPI01351262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0a629994070041ad5d9c47e1b76581033bc061d34193c2509e66464726c655. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPPI01351263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078d70a2a60882b9a8765bc0546a8e21702d44da0c555185554a906f72231906. 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/JPPI01351341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744831d1552af25a6f01d6d81f1e06edb8356d298d84353eae1ef873eb4495b6. 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/JPPI01351269.
Hello Alone -Yui Ballade- - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a0301280fb755dc36990dce74c75c7d88c457526709f6c3f5e5350d48a7148. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPPI01351349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f2734f0d2c6e3646493cfd89753969d604d9110a223b6eea2ac319f6f03df0. 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/JPPI02050130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1986136cfae57d2ff7043bb2bc18e2c1ba6fa7268bece19f29b64847614473c. 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/JPPI02050131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a7ee437b46f36cf4a533e5307061f6717fc58ae85e9d3b506e15946d50565. 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/JPPI02050132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8b3867f7454ab2f50760526bae62ec8a6bfb1f06e50cba189308a4d8130820. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPPI02050139.
daiyamondonojundo - Yui Ballade Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534c6650d40827ed57309efd3f1cf12a6ca69fdc46957b0a28a14cde513f596. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPPI02050133.