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 0x766d2f84400e79545d7a9d455f4f6279cfd431b9ba654f0e1240123728eb9fd9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca7ad62d-f922-4b01-8258-48a31e45479b.json and https://artists.proofprofile.net/proofs/artist/ca7ad62d-f922-4b01-8258-48a31e45479b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
おぼろ月夜の上州路/文句があるなら言ってみな
おぼろ月夜の上州路／文句があるなら言ってみな
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 0xa75b91dbed91936c63ae1319f865a17c452850ec040c2938169e2477440767c7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPTO01200818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf379031813f5aa55a4e3ef5d9d720cb74fc6463c7b2efe0f8dfd390cec28c9b7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPTO01200816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375ffa743a67608d83b756583a87451f54e2b3a04665069b9252fcdf6c090f7b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPTO00500184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966452111d088642a29a84c7e69fe25bce3e2146d477037ee9aecfb0a317129a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPTO00701355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe0ebade57ee985f0545905f8deaa3f88dd15dae04886c76b103166cc666f24. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/JPTO00503168.
忘れないで/骨から泣きたい雪子です
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c43917843ddcb8a298039cb0e39bc9085d0e176177491c1e6524f7ccd55ab. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/JPTO00701356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427494fef09e0b9cb55d0ed804f5d1b8605c463103e7bbb2e324d932ea56fd25. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPTO00900992.
会津追分 (スペシャル・パッケージ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c43917843ddcb8a298039cb0e39bc9085d0e176177491c1e6524f7ccd55ab. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/JPTO00701356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1400c1685b85c4566919d82c6b40686602708b2ce5bb1b0322b6cc92cb061564. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPPO01900493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb879486276fed03725b3ab1b03cc2c04699560c0a70d7d9aee625ae59b7910d7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPPO01900494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c799547fe59b3645d2f4c84fa56f67719a9f70f864aa916dedf8649fd3419b7. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/JPPO01904326.
宗右衛門町ブルース - ニューボーカル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cdcbdebf2b8dc83d81222fbd1326b0d60614d08e7322cff6b6cea76ecb3daa. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/JPPO01904327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34c1b08a444502888f921781b992e5a160f01d0c27f989f749cd26a456e8a2d. 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/JPPO01904331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533bd13761266f6c179b0d9cf5a93af26f4f38f334ff1fe28979d1bc5aaf32c5. 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/JPPO02001347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99771387ac9174b39e51fd02e9bcc23246164ecf68974767bf221add4d5c5f1b. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPPO02204862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf9394c55ef636bb32a12943603f57a0b1bc0a58a2f020310f7088420a66685. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCJPS2243512.